SMALL FOLDABLE SINGLE-SEATER ACQUATIC PEDAL-BOAT, TRANSFORMABLE INTO TROLLEY FOR TRANSPORT THEREOF

Description

BRIEF DESCRIPTION.

[0001] The invention is a small foldable single-seated human-powered boat, according to the preamble of claim 1, propelled by pedals and at least a single front paddlewheel, designed mainly for leisure purposes in calm waters, as a boat known from CA 2 522 858. It is made mostly of plastic materials for avoiding or minimizing maintenance and corrosion. Its main feature is that is foldable around an axis transverse to the boat, becoming a kind of trolley or wheeled cart with a handle for dragging it by land, shortening its length to next to the half when folded. By this way it is easily transportable by the user on land, or even on irregular terrain or stairs when folded. The storage and stacking is too easy, so it can be placed into a cabinet, trunk or any kind of small space. It has too an adjustable backrest and movable pedals and paddlewheel to suit the user, and two optional side boxes or chests for storing objects, whose lids can serve as armrests for the passenger once sit on the boat. Two levers at both sides control the two rear rudders with a string, and because both levers and wheels have the same rotation axis, these levers are automatically placed between the two main half floating bodies of the boat when it is folded and they are protected against hits by both transport wheels.

[0002] For improving stability in navigation, the foldable pedal boat is preferably a catamaran, with their two folding halves in form of floating bodies having each two lateral main floats with a central platform or bridge connecting both of them in form of a whole main folding piece or body that folds over the other one. This platform or bridge gives too a seat for the passenger.

[0003] The main advantage of the foldable pedal boat is the ability to be folded and unfolded in only few seconds, being firmly fixed in both open and closed positions and ready for navigation or for storage or transport by land. It uses one or two symmetrical U-shaped tube bars whose arms can slide longitudinally into holes molded, shaped or practiced in both the two main halves of the boat, and they are fixed with pins for fixing them in both folded and unfolded positions. In the unfolded position, both U-shaped bars are movable between two stoppers for adjusting the backrest and the pedals to the passenger in several positions, but with no possibilities that they can be accidentally loosen or released and the boat folded in navigation. These symmetrical U-shaped tube bars serve too as a handle and as a locking device for maintaining folded the boat into a trolley form, and for chaining, stacking or hanging it if necessary.

[0004] The small size and capabilities for saving time and for easy transport have the price to limit their uses into relatively calm waters such as lakes, pools, or calm beaches or rivers. It can be interesting for individuals who want to save leisure time or to have a very small boat portable by land, as for recreattonal and hotel companies or water parks that want to have a number of these easily storable boats for their guests or customers in especially equipped recreational areas.

BACKGROUND OF THE INVENTION.

[0005] There are many human-powered boats (mainly pedal boats) described of many sizes, structures, materials and number of seats. The most of them are designed for individuals and have foldable, collapsible, inflatable or detachable elements, mainly floats or inflatable structures based on frames with rods, screws and a lot of pieces for assembly and linkage, that are cumbersome to assemble and with low structural strength. These inventions have three types of main drawbacks:

a) A large number of metallic parts and components (frames, screws, washers, clamps, chains, etc.), which have corrosion problems that plastic components do not have, and because of that they require continuous maintenance and replacements or to be manufactured with marine alloys.

b) The presence in many of them of inflatable floats made in plastic or rubber, that have a high compactness, but also a low durability and low safety by easy puncture, aging or tearing.

c) The need of time for assembling and disassembling the structure, and / or the inflation and deflation of floats every time the boat is used, which means less time for leisure.

[0006] Other models are usually large and heavy pedalos with two seats or more, with no compacting or folding capabilities, that are mainly oriented for hotels, beach businesses, waterparks or other leisure companies. They are designed to be durable, robust and with low maintenance, not for easy transport or for saving time.

[0007] Although there are several folding boats described yet, and some of them are convertible into carts or have attachable wheels, the invention presented in this document has characteristics that are not presented in previous inventions. We must mention first the most notorius previous patent documents and then identify the new features that provide the presented invention.

[0008] The documents US3175234A1, SU1754568A1, US5353733A1 and US3594834A1 describe foldable single-hull boats or foldable dugout canoes split in two foldable halves, with the peculiarity that they are foldable along a middle axis transverse to it, to which can be attached optionally wheels or a frame with wheels for transforming them into a kind of trailer for being transported towed by a motor vehicle. The document ES2128887A1 describes a motorized catamaran for sailing that is foldable along an axis transverse to the boat with a frame convertible in a trailer for transportation by a vehicle. The document DE3302276A1 describes a motorized single-hull vessel that can be folded by a central transverse axis, and whose prow section has retractable wheels for converting it into a trailer and being towed by a vehicle. The document US3061845A1 describes a collapsible amphibian catamaran, in which the floats are split in two halve and can be folded one over the other. Its main particularity is that the floats are mounted on a trame with pivoting wheels that, being lowered by levers, convert the catamaran on a trailer towable by a car. All of these are single-hull foldable boats, when this invention is a catamaran-type foldable boat.

[0009] The document US5870966 "Folding Pontoon Boat" describes a collapsible foldable boat with two floats, each one divided into two halves. The floats have two side wheels each one, leaving them up and above the water level when the boat is open, and down when it is closed, transforming it into a kind of four-wheeled cart. The two side floats are folded rotating symmetrically 90° around two symmetrical longitudinal axes in relation of the vertical longitudinal symmetry plane of the boat, fitting under a horizontal frame that is a primary platform which has a seat for the passenger. The floats are divided too transversely in two parts, allowing a second folding of the structure along an axis perpendicular to the first ones, housing the seat among some holes especially practiced in both prow and stern of the floats, so that the whole boat is compacted into a wheeled box whose dimensions are half the length and half the width of the boat when is open.

[0010] The main previous inventions that are most similar to the one presented here are:
The document US2745118 "Catamaran" describes a collapsible catamaran. It has two floats attached to a horizontal platform, that is foldable according to a transverse axis, made of wood or any solid material, which can fold like a book, below of which the floats are attached thereto. The floats are split into three sliced sections (forward, middle and rear), so that when the middle section of such floats is attached simultaneously to both folding sides of the main folding platform, the folding is not possible due to rigidity. For these reasons it is not a foldable catamaran boat, but a catamaran whose main platform is foldable and to which two detachable floats must be attached later. The boat itself is then detachable but not foldable as the presented invention.

[0011] The document US3083382 "Watercraft" describes a collapsible catamaran in which a metal tube frame with a seat is supported on two parallel side floats that are splitt in three sections (forward, middle and rear), with the main feature that in each float both prow and stern sections can pivot around some transverse hinges that hold them together to the middle section of the same float, so by folding these sections below this middle section it is possible to shorten the length of the boat. After this operation the boat allows a horizontal sliding of the middle sections of the floats inwards along the transverse bars or crossbars for coming in mutual contact at the vertical longitudinal symmetry plale of the boat, reducing the width by compaction, not by folding movements. This invention is also not a folding catamaran as the invention presented here, but a catamaran compactable with some parts that are foldable over other ones, but where the whole is not foldable.

[0012] The document US3613136 "Catamaran" describes a collapsible catamaran foldable according to a middle axis that is transverse to the forward direction of the craft, so that the invention is constituted by two floating canoe-type bodies, having both of them two mutually foldable halves linked by a hinge that allows a mutual folding. These two floats remain together in parallel by a series of crossbars that bind them in a single structure.

[0013] A removable support with a leaf spring suspension system and wheels, which can change its position on the foldable boat, allows the conversion to a trailer for being towed by a motor vehicle. A longitudinal platform or box anchored simultaneously to each of the two folding parts maintains rigid the structure in the unfolded position. The main diference with the invention of this document is the securing elements of the unfolded boat. The presented invention obtains rigidity by two sliding U-shaped tube bars, front and rear, that can be introduced longitudinally and simultaneously into parallel holes practiced inside the other folding half platform of the boat. Also, the wheels in the previous invention are detachable and not coincident with the folding axis, while the presented invention has a common axis for folding movement, the steering levers and the transport wheels. Then, the invention presented in this document has no detachable elements because the compaction movements are by folding and sliding, with no necessity of removing pieces from the structure as this previous invention.

[0014] The document US2005/0034649A1 "Collapsible Watercraft" describes a catamaran-type watercraft with two side floats which are divided transversely into two halves. These floats are attached to a supporting horizontal metal tube frame that serves to place a passenger. This frame is divided into two equal parts, consisting of two rectangular frames, which can be folded one over the other like a book by a middle hinge placed transversely in relation to the forward direction of the boat. As the spiit floats are attached to both two rectangular frames, (the front ones to the front folding frame and the rear ones to the rear folding frame), all the structure can be folded around the transverse hinge. After this first folding movement the split floats can pivot separately 180° inwards around longitudinal hinges placed at the central frame so that the boat is finally packed in a box whose dimensions are about half of the length and half the width of the craft unfolded. This invention has two foding steps instead of a single one, and resembles in this aspect the document US5870966. The invention presented in this document too differs mainly from this one by the sliding elements that give rigidity to the structure when unfolded, as it is previously cited.

[0015] The most seemed previous invention is described in the document DE2OO9278A1 "Wassersportgerat". It describes a very simplified foldable pedal boat, constituted by pair of floats, split transversely in two halves and characterised by a stem half that is thicker than the prow half, so there is an increased buoyancy in the area where the passenger is placed. A simple fabric or a string mesh disposed between them serves as a seat for the passenger. The halves of the prow and stem of the floats are attached to a metal main frame tube, which has two U-shaped tube frame halves that fold one over another by a hinge placed in the central axis which is transverse to the direction of advance of the boat.

[0016] Thus, the folding of the two frame parts gives the folding of the entire structure and the floats being attached to them. The strenghtening of the structure is obtained by an inner rod or the ends of the U-shaped tube that can be inserted into the junction of the two halves, secured with a screw, preventing bending in navigation. Acrankshaft with two pedals and two symmetrical paddlewheels, which are placed on the outer sides of both floats, propel the boat. The crankshaft with pedals and paddlewheels can be placed on three symmetric pairs of notches in both floats, which let you select the most suitable position of the pedals for the user. The simple steering control is a paddlewheel placed at one side in one of the floats, which is operated by a crank, enabling the rotation of the craft depending on the direction of rotation given to the paddlewheel. These two U-shaped tube bars are responsible of rigidization and constitution of the structure, but in both folded and unfolded positions, as well as they are responsible of maintaining joined together both floats and of preventing its accidental folding at the same time.

[0017] This invention, defined in claim 1, where the two folding platforms or halves are entirely manufactured in molded plastic, and the folding axis is placed into a big central transversal hinge. The splitt floats can be manufactured in the same piece that these folding platforms or in separated pieces that must be attached later to them. There are no main metal tube frame structure for maintaning joined the floats, and the U-shaped metal tube bars are placed for preventing the mutual rotation of the two floating platforms. They are responsible for fixing the boat in both folded and unfolded positions. Another important difference is that the two U-shaped tube bars can be independent and not be mutually joined through a junction therebetween with screws as the previous invention cited. Much more, each one ot these U-shaped tube metal bars can be independently movable along two planes placed at different heights, not necessarily in the same horizontal plane as the commented invention. The pedals and the backrest are adjustable by longitudinal sliding of these two bars. In addition, there are many possible embodiments for the invention. The U-shaped metal tube bars give rigidity to both folded and unfolded positions, and in folded position they give a handle for easy dragging and tranporting of the boat by land.

[0018] This invention can be converted into a trolley resembling a wheeled suitcase as a main feature by these U-shaped metal tube bars, and has a commmon rotation axis for the folding parts, for the transport wheels and for the rotation planes of the steering levers, simplyfing all the structure. All compacting and decompacting steps, and all adjusting steps to suit the passenger are all due to rotating and sliding movements of the pieces, so there are no detachable pieces (except the securing pins), so the folding and unfolding movements are quick and easy and the most of the elements are always joined during the use.

DESCRIPTION OF THE FIGURES.

[0019] The described invention has several possible embodiments of the symmetrical U-shaped tube bars that can be manufactured, all of them with the same inventive concept. Several drawings of one of the possible embodiments of the foldable pedal boat are shown from Figure 1 to Figure 18, while Figures 19,20, 21 and 22 show simplified sections for other possible embodiments.

Figure 1 shows a perspective front view from above of the foldable pedal boat in unfolded position, with the five steps required for folding the boat, marked with arrows and sequentially letters.

Figure 2 shows a perspective front view from above of the foldable pedal boat in folded position.

Figure 3 shows a perspective rear view from above of the foldable pedal boat in unfolded positon.

Figure 4 shows a perspective rear view from above of the foldable pedal boat in folded position.

Figure 5 shows a side view of the pedal boat in unfolded position, showing the main one from the several possible embodiments of the two symmetrical U-shaped tube bars responsible for fixing the structure to open and closed positions. The pins that allow the fixation, releasing and limitation of the longitudinal displacement of these symmetrical U-shaped tube bars are shown, as also the holes practiced in both floating folding halves of the pedal boat where they fit in.

Figure 6 shows a side view of the pedal boat in folded position, showing the embodiment of the two symmetrical U-shaped tube bars and their fixation pins. The dotted line shows the position of the backrest when the pedal boat is folded.

Figure 7 shows a rear view of the foldable pedal boat in unfolded position.

Figure 8 shows a front view of the foldable pedal boat in unfolded position.

Figure 9 shows a top view of the pedal boat showing the symmetrical U-shaped tube bars and the different pieces for displacing and adjusting the pedals and backrest.

Figure 10 shows a bottom view of the pedal boat showing the symmetrical U-shaped tube bars and the different pieces for displacing and adjusting the pedals and backrest.

Figure 11 shows two views of the pedal boat when folded.

Figure 12 shows an exploded view of the pedal boat

Figure 13 shows from above the two floating bodies that fold over each other.

Figure 14 shows from the side the two floating bodies that fold over each other.

Figure 15 shows a detail from the side of the box or drawer with its lid, a rudder control lever with its rope in several positions, and the notches for adjusting the backrest.

Figure16 shows from above a detail of the seat and the rear floats without the frame of the symmetrical U-shaped tube bars.

Figure 17 shows in side and top views the front symmetrical U-shaped tube bar and the pieces that support, adjust and lock pedals and paddlewheel.

Figure 18 shows in side and top views of the rear symmetrical U-shaped tube bar and the pieces that support, adjust and lock the backrest.

Figure 19 shows simplified drawings of the top view and side view of the foms A1, A2 and A3 for implementing and manufacturing the invention. The top view is the same for all three of them.

Figure 20 shows simplified drawings of the top view and side view of the forms B1, B2 and B3 for implementing and manufacturing the invention. The top view is the same for all three of them.

Figure 21 shows simplified drawings of the top view and side view of the form C1 for implementing and manufacturing the invention.

Figure 22 shows simplified drawings of the top view and side view of the forms D1 and D2 for implementing and manufacturing the invention (wih the symmetrical U-shaped tube bars on dotted lines).

DESCRIPTION OF THE INVENTION.

[0020] The foldable boat has a single inventive concept in relation to its fixing system in folded and unfolded positions, but several compatible possible embodiments with this one, using the same parts and elements but changing the embodiment and placement along the boat. We describe in detail the most likely way of manufacturing and then later we will describe the rest of combinations based on the description of the first one.

[0021] The foldable boat consists, as shown in Figure 13 and Figure 14, of two floating platforms or halves, front (1) and rear (2), which can be folded one over the other coincidentally, according to a middle axis (3) transverse to the boat. They are similar but not necessarily identical. Both floating platforms or halves (1) and (2) are made in one or several separated pieces (in this case properly glued, screwed, riveted or connected by any method, for obtaining a single rigid and robust structural unit). The most suitable manufacturing method for these two floating platforms or halves (1) and (2) would be the rotomoulding of plastic materials, in a single piece or in detached pieces that must be joined later. Both of these floating platforms (1) and (2) are symmetric in relation to a longitudinal vertical plane of symmetry passing through the center of the boat.

[0022] Both floating platforms or halves (1) and (2) have each one a middle central piece or platform, like a tray, a front one (4) and a rear one (5), both symmetrical in relation to the longitudinal vertical symmetry plane passing through the center of the craft, which serve as a junction or bridge for both symmetrical front floats (6) and rear floats (7), placed at the sides of each floating platform or half (1) and (2), respectively. Both pair of symmetrical front floats (8) and rear floats (7) are symmetrical in relation to the longitudinal vertical symmetry plane passing through the center of the craft.

[0023] The central posterior bridge (5) or tray of the rear floating platform or half (2) have some moldings that prevent slipping (8) and serves as a seat for the passenger, having an appropriate shape for being comfortable when sitting in. The central bridge or tray (4) of the front floating platform (1) can be smaller than the previous one, and serves as a union between the two front symmetrical front floats (6), as the central bridge or tray (5) of the rear floating platform or half (2) makes the same between the rear floats (7).

[0024] Floating platforms (1) and (2) have tubes (9) and (10) as common hinge, inside of which is inserted, transversely to the craft, a rigid and thick cylindrical rod (11), which gives the folding axis of the craft, which is fixed with a washer (12) and a pin (13), as shown in Figure 12, Figure 13 and Figure 14. As shown in Figure 5 and Figure 6, when the boat is folded, the front floating platform or half (1) rests and coincides with the rear floating platform or half (2), touching between them on some parts of the floats or on attached elements or stoppers.

[0025] When the boat is unfolded, both pairs of symmetrical front floats (6) and rear floats (7) are aligned to constitute two elongated continuous side floats in the boat, making it a small foldable catamaran. The hull shape in the junction between the front float (6) and the rear float (7) at each side of the boat is continuous and with no recesses or protrusions, giving a streamlined profile that makes the sliding of the boat in the water easy. Each one has at its bottom, longitudinally and symmetrically, a keel-shaped thickening (14), which confers strength and resistance to impact or friction against the ground during transport, ending in a rearfin (15), fused to the rear float (7). These fins (15) are responsible for efficient channeling of water flow to the rudder (16), to increase the maneuverability of a boat so small. They are reinforced to prevent breakage due to shock or friction with the ground, as they also serve to protect both rudders (16) when transported by land.

[0026] As shown in the exploded view in Figure 12, the bar (11) of the folding axis of the pedal boat threads by its ends two symmetrical steering levers (17), two equal and symmetrical lateral transport wheels (18) that protect the steering levers (17) from impact or friction to the ground when the boat is folded and dragged by land, and two friction washers (19) that smooth the movement of these steering levers (17).

[0027] To avoid the accidental folding of the pedal boat in navigation, two symmetrical U-shaped tube bars with rounded, square, rectangular or polygonal section, (front (20) and rear (21)), which may be hollow or solid, maintain aligned and rigidly fixed the two floating platforms or halves, front (1) and rear (2).

[0028] As shown in Figure 9 and Figure 10, the front flotation platform or half (1) has at least a couple of pieces, bumps, protrusions or widenings of the float itself (22), placed on the inside, on the outside or on the top of the front floats (6), according to a different embodiment of the invention each.

[0029] Such pieces, bumps, protrusions or widenings of the float (22) are arranged symmetrically along the longitudinal vertical symmetry plane passing through the center of the craft. Each one of these pieces, bumps, protrusions or widenings of the float itself (22) is traversed lengthwise by a hole (23). The central platform or bridge (4) of the front floating platform (1) is also traversed symmetrically by a pair of holes (24), performed longitudinaliy and symmetrically in relation to the longitudinal vertical symmetry plane passing through the center of the boat (on the inside, on the outside or on top of the front floats (6), according to the embodiment of the invention).

[0030] The rear floating platform or half (2) is also traversed by one or two pairs of parallel holes (25), longitudinaliy and symmetrically practiced in relation to the longitudinal vertical symmetry plane passing through the center of the craft (on the inside, on the outside or on top of the rear floats (7), according to the embodiment of the invention), with the difference that at least a pair of holes (24) and a pair of holes (25) are practiced at the same height. The holes on the right side and on the left side of the boat are perfectly aligned, and are responsible of housing the front U-shaped tube bar (20).

[0031] The pairs of holes (23), (24) and (25) have all of them the same cross-section as both U-shaped tube bars (20) and (21). The two arms of the front U-shaped tube bar (20) can be introduced consecutively so on through the holes (23), (24) and (25) at both sides of the boat. They can slide longitudinally to the boat between two limits made by two stoppers, but always keeping the two floating platforms or halves (1) and (2) unfolded and unable to be folded when their ends are inserted into the pairs of holes (25) of the rear floating platform or half (2). By sliding the ends of the U-shaped tube bar (20) out from these pairs of hotes (25), the folding of the boat is allowed, at least by part of the front floating platform or half (1). This is shown in Figure 5 and Figure 8.

[0032] As shown in Figure 9 and Figure 10, the rear flotation platform or half (2) has at least a couple of pieces, bumps, protrusions or widenings of the float itsetf (26), placed on the inside, on the outside or on the top of the rear floats (7), according to a different embodiment of the invention each. Such pieces, bumps, protrusions or widenings of the float (26) are arranged symmetrically along the longitudinal vertical symmetry plane passing through the center of the craft. Each one of these pieces, or bumps, protrusions or widenings of the float itsetf (26) is traversed lengthwise by a hole (27). The central platform or bridge (5) of the rear floating platform (2) is also traversed symmetrically by a pair of holes (28), performed longitudinally and symmetrically in relation to the longitudinal vertical symmetry plane passing through the center of the boat (on the inside, on the outside or on top of the rear floats (7), according to the emodiment of the invention). The rear floating platform or half (2) is also traversed by one or two pairs of parallel holes (29), longitudinally and symmetrically practiced in relation to the longitudinal vertical symmetry plane passing through the center of the craft (on the inside, on the outside or on top of the rear floats (7), according to the embodiment of the invention), with the difference that at least a pair of holes (28) and a pair of holes (29) are practiced at the same height.

[0033] The holes on the right side and on the left side of the boat are perfectly aligned, and are responsible for housing the rear U-shaped tube bar (21). The pairs of holes (27), (28) and (29) have all of them the same cross-section as both U-shaped tube bars (20) and (21). The two arms of the rear U-shaped tube bar (21) can be introduced consecutively so on through the holes (27), (28) and (29) at both sides of the boat. They can slide longitudinally to the boat between two limits made by two stoppers, but always keeping the two floating platforms or halves (1) and (2) unfolded and unable to be folded, when their ends are inserted into the pairs of holes (29) of the front floating platform or half (1). By sliding the ends of the U-shaped tube bar (21) from these pairs of holes (29), the folding of the boat is allowed, at least by part of the rear floating platform or half (2). This is shown in Figure 5 and Figure 6. By having not just one but two U-shaped tube bars (20) and (21) keeping both the pedal boat unfolded, there is greater safety although one of them could be broken, released or loosen in navigation.

[0034] As shown in Figure 17 and Figure 18, the front U-shaped tube bar (20) has a pair of pedals (30) housed in a pair of bearings (31) that are transversely screwed to the symmetrical arms of this front U-shaped tube bar (20).

[0035] The pedals (30) are joined to at least a single central paddlewheel (32), whose size allows the easy folding of the structure of the pedal boat by fitting into the space between the pairs of front floats (6) and rear floats (7). The rear U-shaped tube bar (21) has two hinges (33) transversely screwed to their both arms, inside of which a bent rounded bar (34) is placed, which supports and allows to adjust the backrest (35) for suiting the passenger.

[0036] The front U-shaped tube bar (20) has in their both symmetrical arms a pair of vertical holes (36), equal and symmetrical to the longitudinal vertical symmetry plane passing through the center of the craft, and a pair of longitudinal slots (37), also equal and symmetrical to the longitudinal vertical symmetry plane passing through the center of the craft. Both into the pair of holes (36) and into the pair of longitudinal slots (37) a pair of pins (38) can be placed, that cross vertically the pieces, bumps, protrusions or widenings (22) of the pair of front floats (6). When the pair of holes (36) is crossed by the pair of pins (38), the front U-shaped tube bar (20) is blocked and can not slide longitudinally. If it is positioned in a way that their ends are not inserted into the pair or pairs of holes (25) of the rear floating platform or half (2), the rotation is not impeded and the foldable pedal boat can be folded around its axis (3).

[0037] When the pair of pins (38), through the pieces, bumps, protrusions or widenings (22) of the pair of front floats (6), are placed into the pair of longitudinal vertical slots (37), the front U-shaped tube bar (20) can displace longitudinally in the direction of the boat a distance equal to the length of this pair of longitudinal vertical slots (37). This allows that the pedals (30) and the paddlewheel (32) can be adjusted to the size of the passenger but always with the ends of the arms of the front U-shaped tube bar (20) introduced into the pair or pairs of holes (25) of the rear floating platform or half (2), impeding the accidental folding of the pedal boat in navigation.

[0038] For fixing intermediate positions of the front U-shaped tube bar (20), the pair of pedals (30) and the paddlewheel (32) in relation to the passenger, two small pivoting and / or sliding bolts or latches (39), symmetrically placed in both arms of the front U-shaped tube bar (20), can rotate and / or slide into some small hinges or supports (40), fitting into preset positions disposed in two rows of notches or holes (41), symetrically practiced on the inside, on the outside or on top of the pair of front floats (6), according to the embodiment of the invention. The passenger uses both hands to unlock such pivoting and / or sliding bolts or latches (39) and pushes the pedals forward or backward by using the feet, locking then the front U-shaped tube bar (20) in the desired position.

[0039] The rear U-shaped tube bar (21) has in their both symmetrical arms a pair of vertical holes (42), equal and symmetrical in relation to the longitudinal vertical symmetry plane passing through the center of the craft, and a pair of longitudinal vertical slots (43), also equal and symmetrical in relation to the longitudinal vertical symmetry plane passing through the center of the craft. Both into the pair of holes (42) and into the pair of longitudinal slots (43), a pair of pins (44) can be fitted vertically, which can be introduced at time through the pieces, bumps, protrusions or widenings (26) of the pair of rear floats (7).

[0040] When the pair of pins (44), placed across the pieces, bumps, protrusions or widenings (26) of the rear floats (7), are too placed across the pair of holes (42), the rear U-shaped tube bar (21) is blocked and can not slide longitudinally, being positioned so that their ends are inserted out from the pair or pairs of holes (29) of the front floating platform or half (1), so this does not prevent the folding of the boat around its axis (3).

[0041] When the pair of pins (44), placed across the pieces, bumps, protrusions or widenings (26) of the rear floats (7) are too placed across the pair of longitudinal slots (43), the rear U-shaped tube bar (21) is not blocked and can slide longitudinally in the main direction of the boat the same distance that the length of the pair of slots (43). This allows the displacement of the support bar (38) of the backrest (35) in relation to the position of the passenger, but so that in any position the arms of the rear U-shaped tube bar (21) are always inserted into the pair or pairs of holes (29) of the front floating platform or half (1), so that the pedal boat can not be folded around its axis (3).

[0042] For obtaining intermediate positions of displacement of the rear U-shaped tube bar (21) and inclinations of the backrest (35), two L-shaped horizontal bars (45), that are bolted, riveted or glued to the rear U-shaped tube bar (21), have at their extremes two handles with locking pivoting and / or sliding devices that can be placed into two symmetrical rows of notches or holes (47), performed on the outer sides of the pair of rear floats (7). These two symmetrical rows of notches or holes (47) fix the two L-shaped horizontal bars (45) in preset positions and adjust the backrest (35) in inclination. They can be easily catched by the passenger to unblock, move and relock the whole using both hands at once.

[0043] When the pedal boat is folded, the two U-shaped tube bars front (20) and rear (21) can be joined by two ending plastic pieces (48), placed both of them at the transverse middle segment of the two U-shaped tube bars front (20) and rear (21). These two ending plastic pieces (48) have a lock device for a secure joining and have a shape with a handle for dragging or pushing the folded pedal boat as a trolley or cart. The backrest (35) is joined to the rear floating platform or half (2) by a straight bar (50) and an ending washer (51) with a pin (52) that crosses and threads it by using the tube hinges (53) and (54). The backrest (35) can then rotate freely around the axis provided by this straight bar (50) when the pin (52) is secured, but is always joined to the boat. A pair of rear hooks (55) can be coupled and uncoupled to the supporting and adjusting bent bar (34) of the backrest (35), allowing the backrest (35) to be folded downwards when the boat is folding, making space for allowing the coupling of the paddlewheel (32).

[0044] The bearings (30) and the hinges (31) are screwed to the U-shaped tube bars front (20) and rear (21), respectively, and they can be used as stoppers for their longitudinal displacements. These elements stop in the pieces, or bumps, protrusions or widenings of the float itself (22) and (26), so unless they are unscrewed they prevent the U-shaped tube bars front (20) and rear (21) from releasing out from the pair of holes (23) and (24), and from the pairs of holes (27) and (28), respectively, and being lost. However, they do not prevent that the U-shaped tube bars front (20) and rear (21) can be out from the pair of holes (25) and (29), so the pedal boat can be folded around its axis (3), because the pins (38) and (44) are responsible of avoiding this fact.

[0045] The floating platform or half (2) have at each one of the stems of their floats (7) a vertical hole (56) for housing a rudder (16) which is confined on this position by a fixing piece that has an horizontal pulley (57). A single a rope or string (58) connects the two horizontal pulleys (57) of both rudders (16) and the two steering levers (17), synchronizing all of them. As shown in Figure 15, by pushing forward any of the two steering levers (17), the rope (58) is strained, both rudders turns at once in this direction, and the other steering lever (17) is pulled back. By pushing back any or the two steering levers (17), the rope (58) is loosen, which has the advantadge of allowing to fold the boat without disengaging or unhooking it, saving time. The steering levers (17) are protected from contact wiih the ground by the side transport wheels (18).

[0046] The boat has two side chests or boxes (59), consisting of two small openings or hollows (64) symmetrically practiced on top of the rear floating platform or half (7), so that they are placed at both sides of the seat and the backrest (35). Each one is closed with a small tilting lid or cover (60), which rotates on a transverse hinge (61). A small stopper (62) limits the opening angle of the cap or cover (60) and a small handle (63) makes more easy to open and to cióse it. The covers or lids (60) have a shape with a curved upper surface that allow them to be used as armrests. When the boat Is folded these covers or lids (60) and the top of the chests or boxes (59) fit into two hollows (64) practiced simetrically at the top of the floats (6) of the the front floating platform or half (1), so they do not not impede the folding of the structure. Both the chests or boxes (59) and the hollows (64) have small holes for water drainage.

[0047] To fold the pedal boat, they are five steps. For opening the pedal boat the process is the inverse:

a) By unlocking the pairs of pivoting and / or sliding handles (39) and (46), the pairs of pins (38) and (44) must be removed both from the pair of vertical holes that cross the pieces, bumps, protrusions or widenings (22) and (26) of the pair of front floats (6) and rear floats (7), respectively, as from the pair of longitudinal slots (37) and (43) of the U-shaped tube bars front (20) and rear (21), respectively.

b) By pulling outwards the U-shaped tube bars front (20) and rear (21), and by matching their pairs of holes (36) and (42) with the vertical holes that cross the pairs of pieces, bumps, protrusions or widenings (22) and (26) of the floating platforms or halves (1) and (2).

c) By passing the pairs of pins (38) and (44) through the vertical holes practiced in the pieces, bumps, protrusions or widenings (22) and (26) of the pair of front floats (6) and rear floats (7), respectively, and through the pairs of holes (36) and (42) of the U-shaped tube bars front (20) and rear (21), respectively.

d) By taking out the bar (34) from the flanges (55) of the backrest (35), and folding it back, leaving this backrest (35) hanging down between the paddlewheel (32) and the rear U-shaped tube bar (21).

e) By taking the front handle piece (48) and folding the front of the boat to the back, joining the two handle pieces (48), and closing them with the notch or locking device.

[0048] Following the inventive concept previously described, there are several possible embodiments of the invention, which simplified drawings can be seen from Figure 19 to Figure 22. In a group A of three possible embodiments of the invention, the arms of the two U-shaped tube bars front (20) and rear (21), the pieces, bumps, protrusions or widenings (22) and (26) of the pair of front floats (6) and rear floats (7), and the pairs of holes (23), (24), (25), (27), (28), (29), are located on the inner sides of the pair of front floats (6) and rear floats (7).

[0049] The arms of the two U-shaped tube bars front (20) and rear (21), and the elements that allow their hosting and longitudinal displacement can be placed at different heights in two different horizontal displacement planes for each one (case of the embodiments A1 and A2), or at the same height, with a single horizontal displacement plane for both U-shaped tube bars front (20) and rear (21) (case of the embodiment A3). In the last one, the arms of the two U-shaped tube bars front (20) and rear (21) are finished in tube ends that fit mutualty between them. For that the pieces, bumps, protrusions or widenings (22) and (26) and the pairs of holes (23), (24), (25), (27), (28), (29) are placed at the same height, with the peculiarity that the pairs of holes (24) and (29) and the pairs of holes (25) and (28) are now the same because they are in the same plane.

[0050] In a group B of three possible embodiments of the invention, the arms of the two U-shaped tube bars front (20) and rear (21), the pieces, bumps, protrusions or widenings (22) and (26) of the pair of front 25 floats (6) and rear floats (7), and the pairs of holes (23), (24), (25), (27), (28), (29), are located on the outer sides of the pair of front floats (6) and rear floats (7). The arms of the two U-shaped tube bars front (20) and rear (21), and the elements that allow their housing and longitudinal displacement can be placed at different heights, with two different horizontal displacement planes for the two U-shaped tube bars front (20) and rear (21) (case of the embodiments A1 and A2), or at the same height, with a single horizontal 30 displacement plane for both U-shaped tube bars front (20) and rear (21) (case of the embodiment A3). In the last one, the arms of the two U-shaped tube bars front (20) and rear (21) are finished in tube ends that fit mutually between them. For that the pieces, bumps, protrusions or widenings (22) and (26) and the pairs of holes (23), (24), (25), (27), (28), (29) are placed at the same height, with the peculiarity that the pairs of holes (24) and (29) and the pairs of holes (25) and (28) are now the same because they are in the same plane.

[0051] In a group C of a single possible embodiment of the invention, the arms of the two U-shaped tube bars front (20) and rear (21) are placed in the same diplacement horizontal plale, displacing both of them inside slots and holes aligned horizontally in the top surface of the pairs of front floats (6) and rear floats (7), along its vertical longitudinal plane of symmetry and below the tubes (9) and (10) of the hinge of the folding axis (3) of the pedal boat. In case of passing above this hinge the pedal boat could not be folded. The pieces, bumps, protrusions or widenings (22) and (26) of the pair of front floats (6) and rear floats (7), and the pair of holes (23), (24), (25), (27), (28), (29), are all of them placed at the same height and aligned at each one of the sides of the boat, along the vertical longitudinal plane of symmetry of each front float (6) or rear float (7). The ends of the arms of the two U-shaped tube bars front (20) and rear (21) are finished in solid or hollow extremes, as in the embodiment A3, so that each end is embedded and stuffed into the opposite one to form together a rectangular frame movable and extensible. As there is a single displacement horizontal plane as in the embodiment A3, the pairs of holes (24) and (29) and the pairs of holes (25) and (28) are also the same.

[0052] In a group D of two possible embodiments of the invention D1 and D2, the two U-shaped tube bars front (20) and rear (21) are placed in the same displacement horizontal plane, in longitudinal grooves and holes practiced at the top surface of the pairs of front floats (6) and rear floats (7), as in the embodiment C1. But in this case the ends are not mutually embedded or stuffed, and the pairs of holes (23), (24), (25) are all of them aligned at each side of the boat, but not with the pairs of holes (27), (28), (29). Both U-shaped tube bars front (20) and rear (21) have different widhts. In the D1 embodiment the rear U-shaped tube bar (21) is wider that the front U-shaped tube bar (20), and in the D2 embodiment to the contrary.

[0053] The C and D embodiments have the inconvenience of eliminating the drawers or boxes (59) at sides and their armrests (60).

[0054] The requirement for avoiding the folding of the boat is that each pair of holes (24) and (25), and (28) and (29), must be aligned with each other to allow the introduction of the arms of the two U-shaped tube bars front (20) and rear (21). In the A. A2, A3, 81, B2, and B3 embodiments the arms of the two U-shaped tube bars front (20) and rear (21) are straight, so that on each side of the boat the holes (23), (24) and (25) are aiigned, and the holes (27), (28) and (29) too.

[0055] Other different embodiments of the invention A1\ A2', A3', B1\ B2\ B3', differ from the previous ones in that the two U-shaped tube bars front (20) and rear (21) have their arms bent in a vertical and / or horizontal plane, so that the pairs of holes (23) are not aligned with the pairs of holes (24) and (25) and / or the pairs of holes (27) are not aligned with the pairs of holes (28) and (29). These curves can serve as a stopper for the front U-shaped tube bar (20) against the projections, pieces, bumps, protrusions or widenings (22) of the pair of front floats (6), so it is not released from its place.

[0056] By the same way, they can serve as a stopper for the rear U-shaped tube bar (21) against the pieces, bumps, protrusions or widenings (26) of the pair of rear floats (7), so it is not released from its place too. In the position of these stoppers the folding of the boat is allowed so the only way to extract the frame is disassembly by unscrewing the pairs of protrusions or widenings (22) and (26), and then necessarily they must be manufactured in separated pieces from the floating platforms or halves (1) and (2).

[0057] There can also be mixed combinations, in which the embodiment of elements of the floating platforms or halves front (1) and rear (2), and the U-shaped tube bars front (20) and rear (21), have two different ways for securing the locking of the pedal boat in unfolded position, but making more expensive and complicated the foldable boat. It is possible to combine them in pairs, applying them to the front floating platforms or halves (1) and rear (2) those realizations where the ends of the arms of the U-shaped tube bars front (20) and rear (21) are not mutually introduced, as can be the ways A1, A2, B1, B2, A11, A2\ B1', B2', D1\ D2', which give a large number of possible combinations. We said before that there might be one or two pairs of holes (25) mutually parallel to each other, and one or two pairs of holes (29) mutually parallel to each other. In the previous mixed combinations of different floating platforms or halves (1) and (2), they are needed two pairs of parallel holes (25) and two pairs of parallel holes (29) for placing inside the arms of the two U-shaped tube bars front (20) and rear (21) of different width and / or height.

Claims

1. A small single-seated pedal boat foldable around a central transverse axis, comprising:

- a front floating platform (1) and a rear floating platform (2), which are symmetric in relation to a vertical longitudinal plane of symmetry passing through the centre of the boat, so that they can be folded and matched one over the other, pivoting relatively to each other 180° around a central axis (3) which is transverse in relation to the boat;

wherein said central axis (3) is formed by a bar (11) or cylindrical tube, housed within transverse hollow tubes (9, 10) that are coaxially aligned, whereby the bar (11) is confined by stoppers (12) and pins (13) within the transverse hollow tubes (9,10), one or more of the tubes being joined to the front floating platform (1) and one or more of the tubes being joined to the rear floating platform (2), so that the axis (3) serves as a hinge for folding the boat;
wherein each of the two floating platforms (1) and (2) has a central horizontal surface (4, 5), placed above the water level, that rigidly connects two longitudinally elongated floats, two front ones (6) in the front floating platform (1) and two rear ones (7) in the rear floating platform (2), both of them symmetric in relation to the vertical longitudinal symmetry plane passing through the centre of the boat, so that, when the pedal boat is unfolded from its folded position by turning one of the two floating platforms (1, 2) 180° around the central transverse axis (3), the front float (6) and the rear float (7) of each side of the boat constitute together the external shape of a single continuous hydrodynamic longitudinal elongated float, whose surfaces are continuous, with no breaks or discontinuities between them for improving the water flow during navigation, and the centra! horizontal surfaces (4, 5) form an approximately horizontal flat surface with small bumps or slopes to be used or adapted as a seat or as a surface for lying down a passenger;
characterised by:

- two U-shaped tube bars, one (20) at the front and the other (21) at the rear of the watercraft when it is in unfolded position, both of them of square, rectangular, polygonal, circular or elliptic cross-section and symmetric in relation to the vertical longitudinal symmetry plane passing through the centre of the boat, wherein said U-shaped tube bars (20,21) can slide longitudinally, either in a same horizontal plane or each in a different horizontal plane;

- a plurality of pieces, bumps, protrusions or widenings (22, 26) of the floating platforms (1, 2), placed near the prow and the stern, respectively, of the floating platforms (1, 2), symmetrically in relation to the vertical symmetry plane passing through the centre of the watercraft, each of them being traversed to form a longitudinal hole, hollow, groove or slot (23, 27);

- at least a first pair of longitudinal and mutually parallel holes, slots, grooves or hollows (25,28) in the rear floating platform (2) extending in the longitudinal direction across its central horizontal surface (5) adjacent to the centre of the boat, and at least a second pair of of longitudinal and mutually parallel holes slots, grooves or hollows (24, 29) in the front floating platform (1) extending in the longitudinal direction across its central horizontal surface (4) adjacent to the centre of the boat, said at least one second pair (24, 29) being aligned with the at least one first pair (25, 28) in the unfolded state of the boat, so that the consecutive holes, slots, grooves or hollows in the front and the rear floating platforms, respectively, form a single and continuous hole, slot, groove or hollow crossing both floating platforms (1, 2), wherein each end of the front U-shaped bar (20) is received successively in at least three holes, slots, grooves or hollows, by introducing it firstly into a hole, slot, groove or hollow (23) of one of the pieces, bumps, protrusions or widenings (22) placed near the prow and then sliding it horizontally through two consecutive holes, slots, grooves or hollows (24, 25) in the front floating platform (1) and in the rear floating platform (2), respectively, and wherein each end of the rear U-shaped bar (21) is received successively in at least three holes, slots, grooves or hollows, by introducing it firstly into a hole, hollow, groove or slot (27) of one of the pieces, bumps, protrusions or widenings (26) placed near the stern and then sliding it horizontally through two consecutive holes, slots, grooves or hollows (28,29) in the rear floating platform (2) and in the front floating platform (1), respectively, so that the folding of the pedal boat is prevented, whereas, by sliding longitudinally the ends of the front U-shaped tube bar (20) out of the holes, slots, grooves or hollows (25) of the rear floating platform (2) and by longitudinally sliding the ends of the rear U-shaped tube bar (21) out the holes, slots, grooves or hollows (29) of the front floating platform (1) the folding of the boat is allowed, whereby, in the case that the two U-shaped tube bars (20, 21) have the same horizontal sliding plane, the pairs of holes, slots, grooves or hollows (24, 25, 28, 29) in the front and rear floating platforms (1,2), respectively, adjacent to the centre of the boat, are all placed in the same plane, so that the pairs of holes, slots, grooves or hollows (25) in the rear floating platform (2) receiving the ends of the front U-shaped bar (20) coincide with the pair of holes, slots, grooves or hollows (28) in the rear floating platform (2) receiving the ends of the rear U-shaped tube bar (21), whereas the pair of holes, slots, grooves or hollows (24) in the front floating platform (1) receiving the ends of the front U-shaped bar (20) coincide with the pair holes, slots, grooves or hollows (29) in the front floating platform (1) receiving the ends of the rear U-shaped bar (21), the ends of the U-shaped bars (20,21) the finished so as to allow their mutual plugging or coupling.

2. Small single-seated pedal boat according to claim 1, in which each U-shaped tube bar (20) and (21) has a pair of holes (36) and (42), respectively, symmetrically in relation to the vertical symmetry plane passing through the centre of the boat, each hole practiced or drilled vertically through one arm of the respective U-shaped bar, whereby when each U-shaped tube bar (20) and (21) slides to a correct preset longitudinal position in relation to the pedal boat, a fixation pin (38, 44) is inserted through its respective hole (36, 42), crossing in turn at least one from a pair of two other coaxial holes drilled symmetrically in the pieces, bumps, protrusions or widenings (22, 26) of the floating platforms (1, 2) near the prow and the stern, respectively, wherein the longitudinal positions where these holes (36, 42) are drilled in their respective U-shaped tube bar (20, 21) are such that when each pair of fixation pins (38, 44) crosses simultaneously the pairs of holes (36, 42) of the respective U-shaped tube bar (20, 21) and the pairs of holes crossing the pieces, bumps, protrusions or widenings (22, 26) of the corresponding floating platform (1, 2), this U-shaped tube bar (20, 21) is blocked, making impossible its displacement and its release from the foldable boat, while at the same time in this position the ends of their arms are not introduced into the holes, slots, grooves or hollows (25, 29) adjacent to the centre of the boat of the opposite floating platform (1) or (2), so that the folding of the boat around its centre axis (3) is not impeded, and wherein by joining the blocked U-shaped tube bars (20, 21) when the pedal boat is completely folded, they can be used as a handle for dragging and transporting the foldable pedal boat as a two-wheeled trolley.

3. Small single-seated pedal boat according to claim 2, in which each U-shaped tube bar (20, 21) has two parallel longitudinal vertical slots (37, 43), respectively, that each each one vertically crosses completely one arm of each U-shaped tube bar (20. 21), the slots being parallel to arms and disposed symmetrically in relation to the vertical longitudinal symmetry plane passing through the centre of the boat, and in which inside and crossing these two pairs of parallel longitudinal vertical slots (37, 43) two pairs of fixation vertical pins (38, 44) can be inserted, respectively, so that when these pairs of fixation pins (38, 44) cross consecutively the vertical holes practiced or drilled across the pieces, bumps, protrusions or widenings (22, 26) and these parallel longitudinal vertical slots (37, 43), each U-shaped tube bar (20, 21) can move and displace longitudinally a distance equal to the length of the respective pair of parallel longitudinal vertical slots (37, 43) between two positions determined by their position and length in the corresponding U-shaped bar (20, 21), serving then as stoppers or limits to the displacement of the U-shaped tube bars (20, 21), and wherein between these two respective displacement limits, both U-shaped tube bars (20, 21) always have, when the boat is in unfolded position, the ends of their arms placed inside the pairs of consecutive longitudinal holes, slots, grooves or hollows (25) or (29) adjacent to the centre of the boat of the opposite floating platform (1) or (2), impeding the folding of the pedal boat although both U-shaped tube bars (20, 21) can slide longitudinally.

4. Small single-seated pedal boat according to claim 3, in which once the pedal boat is folded, the central transverse segment of both U-shaped tube bars (20, 21) fits into or to the other one, said U-shaped tube bars (20, 21) optionally being bent or curved to facilitate this fitting, wherein the U-shaped tube bars (20, 21) can be mutually united and anchored by pieces of plastic (48) with hooks, clasps or anchoring tabs which serve both as a handle for dragging the pedal boat by land, and as a system which prevents mutual rotation of the floating platforms (1, 2) around its transverse central axis (3), avoiding accidental opening and unfolding on land.

5. Small single-seated pedal boat according to claim 4, in which the ends of the bar (11) or cylindrical tube which serves as folding axis (3) of the boat, protrude laterally at both sides by an additional distance, so that it is possible to thread in said ends two side transport wheels (18), attached to said stoppers (12) and secured with said pins (13) to the cylindrical bar (11) or cylindrical tube, so that such side transport wheels (18) allow the boat to be easily dragged or pushed by land as a wheeled suitcase or trolley when folded or even when unfolded if the wheels (18) have a sufficient size.

6. Small single-seated pedal boat according to claim 4 or claim 5, in which when the pedal boat is unfolded and the pair of pins (38, 44) are inserted simultaneously into their corresponding and respective pairs of slots (37, 43) of the U-shaped tube bars (20, 21) and into the pairs of holes crossing the pieces, bumps, protrusions or widenings (22, 26) of the floats (6, 7), both U-shaped tube bars (20, 21) can be displaced longitudinally and adjusted at intermediate distances between the two displacement limits imposed respectively by the length of each one of the pairs of slots (37, 43), wherein the intermediate displacement positions are due to a pair of bolts, pins or latches (39, 46) for each U-shaped tube bar (20, 21), placed symmetrically in relation to the vertical symmetry plane that crosses the centre of the boat and in relation to the respective U-shaped tube bar (20, 21), which can be either tilting around small hinges (40), or sliding by using pins to prevent them from leaving their holes, wherein said pairs of bolts, pins or latches (39, 46) can be inserted or fitted in said preset intermediate positions by using two rows of grooves, slots or holes (41, 47), so that each of these pairs of rows are placed on one of the floating platforms (1, 2), symmetrically in relation to the vertical longitudinal symmetry plane passing through the centre of the craft, so that, in order that the user can use his or her hands to catch easily the tilting or sliding bolts, pins or latches (46), a pair of connection bars (45), either straight, bent, curved in L-shape or curved in Z-shape, are bolted or riveted to the rear U-shaped tube bar (21) and contain the tilting or sliding bolts, pins or latches (46) in order to be inserted of fitted into the row of grooves, slots or holes (47) in the rear floating platform (2), that are used for adjusting a backrest (35).

7. Small single-seated pedal boat according to claim 6, in which there are two steering control levers (17), one at each side of the boat, that are placed on both outer sides of the floating platforms (1, 2) and can pivot around the bar (11) or cylindrical tube of the central axis (3), or placed on an additional axis parallel to the central axis (3), wherein each steering control lever (17) is formed by a rod or plate that turns perpendicularly to the folding axis (3), wherein each lever (17) has on the top a handle or knob for easy handling by the passenger, and on the bottom a ring, hole or crimping system on which one of the ends of a single string, cable or rope (58) for dragging the rudders (16) can be tangled, knotted or fixed, said string, cable or rope (58) passing horizontally inside tube-shaped guides or rings along the outer edges of the rear floats (7) and / or the rear floating platform (2), so that, by pushing forward one of the steering control levers (17), the string, cable or rope (58) drags both parallel rudders (16) to the desired direction synchronically, while the other steering control lever (17) is pulled back at the same time, and, by pushing back one or the two steering control levers (17), the string, cable or rope (58) for dragging the rudders (16) is loosened, wherein, in order to facilitate this effect of maintaining tight or loose the string, cable or rope (58) for dragging the rudders (16), the steering control levers (17) can be bent through a predetermined angle, so that it is not necessary to disengage the rudder control system in order to fold the boat, because the rudder control levers (17) are pivoted back in this situation, automatically protecting and locking their upper ends with handles between the floating platforms (1, 2) at each side of the boat, and protecting their lower ends from contact with the ground by the side transport wheels (18).

8. Small single-seated pedal boat according to claim 7, in which each front and rear float (6, 7) comprises at least a small wheel (49), placed symmetrically in relation to the vertical longitudinal symmetry plane passing through the centre of the boat, and extending vertically downward from the vertical longitudinal plane of symmetry of each float (6, 7), which help the transport on land when the boat is unfolded, but whose small size gives little drag or resistance to advance when navigating, while allowing that the pedal boat can stand without falling by being supported simultaneously on the two side transport wheels (18) and the pairs of lower small wheels (49),

9. Small single-seated pedal boat according to claim 8, in which a crankshaft with two pedals (30) is configured to rotate freely around a horizontal axis transverse to the boat by placing the ends of the crankshaft into a pair of bearings (31) symmetrically screwed or fixed to the front U-shaped tube bar (20), wherein these pedals (30) are joined to at least a central paddlewheel (32) placed between both pedals (30) and / or, in case that the horizontal displacement plane of the axis of the crankshaft would be placed above the front floats (6), to two lateral paddlewheels (32) placed at enlarged ends of the crankshaft that protrude laterally at both sides of the boat outside the front floats (6), so that the boat can be folded without interference therewith.

10. Small single-seated pedal boat according to claim 9, in which a foldable and detachable backrest (35) pivots freely around a horizontal axis transverse to the boat, said axis being formed by at least a cylindrical rod or bar (50), fixed with caps and washers (52) and pins (51), that thread a series of transverse coaxial parallel tubes (53) fixed on the rear end of the central horizontal surface (5) of the rear floating platform (2), and other parallel coaxial transverse tubes (54) fixed in the bottom of the backrest (35), with the particularity that said folding backrest (35) has some rear hooks on which the middle part of a U-shaped bar (34) of circular cross-section can be hooked or fixed, whose lower ends pivot in a pair of transverse hinges (33) symmetrically screwed to the rear U-shaped tube bar (21), to prevent the backrest (35) from falling under its own weight or the weight of the passenger, allowing the inclination of the backrest (35) to be adjusted by the horizontal displacement of the rear U-shaped tube bar (21).

11. Small single-seated pedal boat according to claim 10, in which there are, arranged at both sides of the top of the rear floating platform (2) and the rear floats (7), and at both sides of the seat and passenger, two chests or boxes, arranged longitudinally in relation to the boat, open at the top, which boxes can serve as side receptacles (59) for storing objects, and which boxes can be moulded in the same mould as the rear floating platform (2), or which boxes are made as detachable elements fixed with pins or screws, the boxes having little holes for water drainage and a lid (60) that pivots on a hinge (61) at the side or at the rear which closes on its corresponding chest or box (59), said lids (60) having an optimized shape to serve as armrests for passenger's comfort, wherein a receptacle (64) is formed as a hollow or a hole (64) in the top of each of the front floats (6) of the front floating platform (1), in which respective receptacle each side box (59) with its lid (60) fits perfectly when the boat is folded, allowing the full folding of the pedal boat.

Ansprüche

1. Ein kleines einsitziges Tretboot, das um eine zentrale Querachse faltbar ist, umfassend:

- eine vordere schwimmende Plattform (1) und eine hintere schwimmende Plattform (2), welche symmetrisch im Verhältnis einer vertikalen Längssymmetrieebene sind, die durch die Mitte des Tretbootes verläuft, sodass sie gegeneinander gefaltet werden können und eine von ihnen auf die andere passt, sodass dies geschieht, indem einer von ihnen um 180° in Bezug auf den anderen gedreht wird, indem er um eine Mittelachse (3) geklappt wird, die quer zum Tretboot liegt;

wobei die Mittelachse (3) von einer zylindrischen Stange oder Rohr (11) gebildet wird, welches in quer verlaufenden Hohlrohren (9, 10) untergebracht ist, die koaxial ausgerichtet sind, die zylindrische Stange oder Rohr (11) durch Stopper (12) und Stifte (13) innerhalb der quer angeordneten Hohlrohre (9,10) beschränkt ist, eines oder mehrere der quer verlaufenden Hohlrohre (9, 10) mit der vorderen schwimmenden Plattform (1) verbunden sind und eines oder mehrere der quer verlaufenden Hohlrohre (9, 10) mit der hinteren schwimmenden Plattform (2) verbunden sind, in einer Weise, die Mittelachse (3) als Gelenk zum Falten des Tretbootes dient;
wobei jede der zwei schwimmenden Plattformen (1) und (2) eine zentrale horizontale Oberfläche (4, 5) hat, die oberhalb des Wasserspiegels angeordnet ist, der zwei längsgestreckte Schwimmkörper starr miteinander verbindet, zwei vordere (6) in der vorderen schwimmenden Plattform (1) starr verbindet und zwei hintere (7) in der hinteren schwimmenden Plattform (2) starr verbindet, beide symmetrisch in Bezug auf die vertikale Längssymmetrieebene, die durch die Mitte des Tretbootes verläuft, sodass, wenn das Tretboot aus seiner zusammengeklappten Position entfaltet wird, indem eine der beiden schwimmenden Plattformen (1, 2) um 180 ° um die quer Mittelachse (3) gedreht wird, dann den vorderen Schwimmer (6) und den hinteren Schwimmer (7) jeder Seite das Tretboot bildet zusammen die äußere Form eines einzigen kontinuierlichen hydrodynamischen länglichen Schwimmers, dessen Oberflächen kontinuierlich sind, wobei zwischen ihnen keine Brüche oder Diskontinuitäten bestehen, um den Wasserfluss während der Navigation verbessern, und die zentralen horizontalen Oberflächen (4, 5) bilden eine annähernd horizontale Ebene ebene Fläche mit kleinen Unebenheiten oder Neigungen, die als Sitz oder eine Fläche zum Ablegen eines Passagiers verwendet oder angepasst werden soll;
gekennzeichnet durch:

- zwei U-förmige Rohrstangen, eine an der Vorderseite (20) und die an der Rückseite (21) des Tretbootes, wenn sich dieses in ausgeklappter Position befindet, wobei beide einen Querschnitt haben, der quadratisch, rechteckig, mehreckig ist kreisförmig oder elliptisch, und sind in Bezug auf die vertikale Längssymmetrieebene, die durch die Mitte des Tretbootes verläuft symmetrisch, die U-förmige Rohrstangen (20, 21) der Länge nach gleiten können, entweder in derselben horizontalen Ebene oder jeweils in einer anderen horizontale Ebene;

- eine Vielzahl von Stücken, Erhebungen, Vorsprüngen oder Erweiterungen (22, 26) der schwimmenden Plattformen (1, 2), welche in der Nähe des Bug und des Hecks des Tretbootes platziert sind, symmetrisch in Bezug auf die vertikale Symmetrieebene, die durch die Mitte des Tretbootes verläuft, wobei jede von ihnen durchquert wird, um ein Langloch, Langhohlraum, Langnut oder Langschlitz (23, 27) zu bilden;

- mindestens ein erstes Paar von in Längsrichtung und zueinander parallelen Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (25, 28) in der hinteren schwimmenden Plattform (2), die sich in Längsrichtung entlang ihrer zentralen horizontalen Oberfläche (5) neben der Mitte des Tretbootes erstrecken, und mindestens ein zweites Paar von in Längsrichtung und zueinander parallelen Längslöchern, Langschlitzen, Längsnuten oder Längsvertiefungen (24, 29) in der vorderen schwimmenden Plattform (1), die sich in Längsrichtung entlang ihrer zentralen horizontalen Oberfläche (4) neben der Mitte des Tretbootes erstrecken, wobei im entfalteten Zustand des Tretbootes das mindestens eines zweite Paar (24, 29) mit dem mindestens eines ersten Paar (25, 28) ausgerichtet wird, sodass die aufeinander folgenden Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (25, 28, 24, 29) in der vorderen schwimmenden Plattform (1) und in der hinteren schwimmenden Plattform (2), beziehungsweise, ein einzelnes und durchgehendes Längslöch, Langschlitz, Längsnut oder Längsvertiefung bilden und die beide schwimmenden Plattformen (1, 2) überqueren, wobei jedes Ende der vorderen U-förmigen Rohrstange (20) nacheinander in mindestens drei Längslöchern, Langschlitzen, Längsnuten oder Längsvertiefungen aufgenommen ist, zuerst in ein Langloch, Langhohlraum, Langnut oder Langschlitz (23) eines der Stücke, Erhebungen, Vorsprüngen oder Erweiterungen (22) sie sind mit versehen, die nahe dem Bug angeordnet sind, und dann horizontal durch zwei aufeinanderfolgende Längslöcher, Längschlitze, Längsnuten oder Längsvertiefungen (24, 25) in der vorderen schwimmenden Plattform (1) bzw. in der hinteren schwimmenden Plattform (2) geschoben werden, wobei jedes Ende der hinteren U-förmigen Rohrstange (21) nacheinander in mindestens drei Längslöchern, Langschlitzen, Längsnuten oder Längsvertiefungen aufgenommen ist, zuerst in ein Langloch, Langhohlraum, Langnut oder Langschlitz (27) eines der Stücke, Erhebungen, Vorsprüngen oder Erweiterungen (26) sie haben, die nahe dem Heck angeordnet sind, und dann horizontal durch zwei aufeinanderfolgende Längslöcher, Längschlitze, Längsnuten oder Längsvertiefungen (28, 29) in der hinteren schwimmenden Plattform (2) bzw. in der vorderrn schwimmenden Plattform (1) geschoben werden, so dass das Klappen des Tretbootes verhindert wird, sodass, durch Schieben der Enden der vorderen u-förmigen Rohrstange (20) in Längsrichtung aus den Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (25) der hinteren schwimmenden Plattform (2) und durch Schieben der Enden der hinteren U-förmigen Rohrstange (21) in Längsrichtung aus den Längslöchern, Langschlitzen, Längsnuten oder Längsvertiefungen (29) der vorderen schwimmenden Plattform (1), das Klappen des Bootes ist zulässig, wobei, in dem Fall dass die beiden U-förmigen Rohrstangen (20, 21) die gleiche horizontale Gleitebene haben, die Paare von Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (24, 25, 28, 29) in den vorderen und hinteren schwimmenden Plattformen (1, 2), beziehungsweise, die an die Mitte des Tretbootes angrenzen, sind alle in der gleichen Ebene platziert, sodass die Paare von Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (25) in der hinteren schwimmenden Plattform (2), die die Enden der vorderen U-förmigen Rohrstange (20) aufnehmen, die gleichen sind wie das Paar von Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (28) in der hinteren schwimmenden Plattform (2), die die Enden der hinteren U-förmigen Rohrstange (21) aufnehmen, während die Paare von Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (24) in der vorderen schwimmenden Plattform (1), die die Enden der vorderen U-förmigen Rohrstange (20) aufnehmen, dieselben sind wie das Paar von Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (29) in der vorderen schwimmenden Plattform (1), die die Enden der hinteren U-förmigen Rohrstange (21) aufnehmen, während der Enden der U-förmigen Rohrstangen (20, 21) sind fertiggestellt, um ein gegenseitiges Zusammenstecken oder Verbinden zu ermöglichen.

2. Ein kleines einsitziges Tretboot nach Patentanspruch 1, bei dem jede U-förmige Rohrstange (20) und (21) ein Paar von Löchern (36, 42) aufweist, die symmetrisch in Bezug auf die vertikale Symmetrieebene liegen, die durch die Mitte des Tretbootes verläuft, wobei jedes Loch vertikal durch im einen Arm der jeweiligen U-förmigen Stange geführt oder gebohrt wird, wobei, wenn jede U-förmige Rohrstange (20) und (21) in Längsrichtung in eine korrekte voreingestellte Längsposition in Bezug auf das Tretboot gleitet, Fixierungsstift (38, 44) ist durch sein jeweiliges Loch (36, 42) eingeführt, und es , die symmetrisch in die Stücke, Erhebungen, Vorsprünge oder Erweiterung (22, 26) in den schwimmenden Plattformen (1, 2) platziert nahe dem Bug und dem Heck, beziehungsweise, wobei die Längspositionen, in denen diese Löcher (36, 42) in ihre jeweilige U-förmige Rohrstange (20, 21) gebohrt werden, derart sind, dass, wenn jedes Paar von Fixierungsstiften (38, 44) gleichzeitig die Paare von Löchern (36, 42) der jeweiligen U-förmigen Rohrstange (20, 21) kreuzt und die die Stücke, Erhebungen, Vorsprünge oder Erweiterungen (22, 26) der entsprechenden schwimmenden Plattform (1, 2), diese U-förmige Rohrstange (20, 21) ist blockiert, was seine Verschiebung und seine Freigabe aus dem faltbaren Tretboot unmöglich macht, während in dieser Position gleichzeitig die Enden Arme nicht in das Längslöchern, Längschlitzen, Längsnuten oder Längsvertiefungen (25, 29) eingeführt werden der gegenüberliegenden schwimmenden Plattform (1) oder (2) nahe der Bootsmitte, sodass das Falten des Tretbootes um seine Mittelachse (3) nicht behindert wird, und wobei durch das Verbinden der blockierten U-förmigen Rohrstangen (20, 21) wenn das Tretboot komplett gefaltet ist, sie kann als Handgriff zum Ziehen und Transportieren des faltbaren Tretbootes als Trolley mit zwei Rädern verwendet werden.

3. Ein kleines einsitziges Tretboot nach Patentanspruch 2, bei dem jede U-förmige Rohrstange (20,21) hat zwei parallele vertikale Längsschlitze (37, 43), beziehungsweise, die jeweils einen Arm jeder Rohrstange (20, 21) vollständig kreuzen, wobei die parallele vertikale Längsschlitze (37, 43) parallel zu den Armen sind und symmetrisch in Bezug auf die vertikale Längssymmetrieebene angeordnet sind, die durch die Mitte des Tretbootes verläuft, und wobei innerhalb und über diesen zwei Paaren von parallelen vertikalen Längsschlitzen (37, 43) zwei Paare von vertikalen Fixierungsstiften (38, 44) jeweils eingefügt werden können, wenn sich diese Paare von Fixierungsstiften (38, 44) gehen durchlaufen vertikalen Löchern, die über die Stücke, Erhebungen, Vorsprünge oder Erweiterungen (22, 26) und diese parallelen vertikalen Längsschlitze (37, 43) ausgebildet oder gebohrt werden, sodass kann sich jeder U-förmige Rohrstange (20, 21) in Längsrichtung bewegen und verschieben Abstand gleich der Länge des jeweiligen Paars paralleler vertikaler Längsschlitze (37, 43) zwischen zwei Positionen, die durch ihre Position und Länge in der entsprechenden U-förmigen Rohrstange (20, 21) bestimmt sind, sodass die dann als Stoppern oder Grenzen für die Verschiebung dienen der U-förmigen Rohrstangen (20, 21), und wobei zwischen diesen beiden jeweiligen Verschiebungsgrenzen beide U-förmigen Rohrstangen (20,21) im aufgefalteten Zustand des Tretbootes immer die Enden ihrer Arme angeordnet haben in den Paaren aufeinander folgender Löchern, Schlitzen, Nuten oder Vertiefungen (25) oder (29) der gegenüberliegenden schwimmenden Plattform (1) oder (2) neben der Bootsmitte, sodass auf diese Weise die Faltung des Tretbootes behindert wird, obwohl beide U-förmigen Rohrstangen (20, 21) in Längsrichtung gleiten können.

4. Ein kleines einsitziges Tretboot nach Patentanspruch 3, bei dem wenn das Tretboot gefaltet ist, das mittlere Quersegment der beiden U-förmigen Rohrstangen (20, 21) in die andere oder zu der anderen passt, wobei die U-förmigen Rohrstangen (20, 21) gegebenenfalls gebogen oder gekrümmt sind für diese Montage erleichtern, wobei die U-förmigen Rohrstangen (20,21) durch Stücke aus Kunststoff (48) mit Haken, Klammern oder Verankerungslaschen, die beide als Griff zum Ziehen des Tretbootes auf dem Landweg dienen, miteinander verbunden und verankert werden können, und als ein System, das die gegenseitige Drehung der schwimmenden Plattformen (1, 2) um ihre quer verlaufende Mittelachse (3) verhindert, um ein versehentliches Öffnen und Entfalten an Land zu vermeiden.

5. Ein kleines einsitziges Tretboot nach Patentanspruch 4, bei dem die Enden der zylindrischen Stange oder des Rohrs (11), die als Klappachse (3) des Tretbootes dient, zu beiden Seiten seitlich um einen zusätzlichen Abstand vorstehen sind, sodass es möglich ist, in die Enden zwei seitliche Transporträder (18) einzufädeln, die an den Stoppern (12) befestigt sind und mit Stiften (13) an der zylindrischen Stange oder des Rohrs (11) befestigt sind, sodass solche seitlichen Transporträder (18) ermöglichen, dass das Tretboot leicht als Rollkoffer, Wagen oder Trolley gezogen oder geschoben werden kann, wenn das Tretboot zusammengeklappt ist, oder sogar im ausgeklappten Zustand, wenn die Transporträder (18) eine ausreichende Größe haben.

6. Ein kleines einsitziges Tretboot nach Patentanspruch 4 oder Patentanspruch 5, bei dem, wenn das Tretboot ausgeklappt ist wenn das Tretboot ausgeklappt ist und das Paar Fixierungsstifte (38, 44) gleichzeitig in ihre entsprechenden und jeweiligen Paare von Längsschlitzen (37, 43) der U-förmigen Rohrstangen (20,21) und in die Paare von Löchern eingeführt wird, wenn man die Stücke, Erhebungen, Vorsprünge oder Erweiterungen (22, 26) der Schwimmer (6, 7) und beide Stücke kreuzen, beide U-förmigen Rohrstangen (20, 21) in Längsrichtung verschoben und in Zwischenabständen zwischen den beiden jeweils auferlegten Verschiebungsgrenzen eingestellt werden durch die Länge eines jeden der Paare von Längschlitzen (37, 43), wobei die Zwischenversetzungspositionen auf ein Paar Bolzen, Stifte oder Riegeln (39, 46) für jede U-förmige Rohrstange (20, 21) zurückzuführen sind, die symmetrisch in Bezug auf die vertikale Symmetrieebene angeordnet sind, die die Mitte kreuzt das Tretboot und in Bezug auf die jeweilige U-förmige Rohrstange (20, 21), wobei die Paare von Bolzen, Stiften oder Riegeln (39, 46) entweder um kleine Scharniere (40) herum geneigt werden können oder unter Verwendung von Stiften gleiten können, um zu verhindern, dass sie ihre Löcher verlassen, wobei die Paare von Bolzen, Stiften oder Riegeln (39, 46) unter Verwendung von zwei Reihen von Nuten, Schlitzen oder Löchern (41, 47) in die voreingestellten Zwischenpositionen eingesetzt oder eingepasst werden können, sodass jedes dieser Paare von Reihen auf einer der schwimmenden Plattformen (1, 2) symmetrisch in Bezug auf die vertikale Längssymmetrieebene angeordnet ist, die durch die Mitte des Tretbootes verläuft, sodass damit der Benutzer seine oder ihre Hände verwenden kann, um die Kipp- oder Schiebebolzen, Stifte oder Riegel (46) leicht zu fangen mittels ein Paar Verbindungsstangen (45), entweder gerade, gebogen, in L gebogen oder in Z gebogen sind, welche an der hinteren U-förmigen Rohrstange (21) angeschraubt oder angenietet und enthalten die Kipp- oder Schiebebolzen, Stifte oder Riegel (46) sind, um in die Reihe von Nuten, Schlitzen oder Löchern (47) eingesetzt zu werden, in der hinteren schwimmenden Plattform (2), die zum Verstellen einer Rückenlehne (35) verwendet wird.

7. Ein kleines einsitziges Tretboot nach Patentanspruch 6, bei dem an beiden Außenseiten der schwimmenden Plattformen (1, 2) befinden sich zwei Lenksteuerhebel (17), einer auf jeder Seite des Tretbootes, die um die zylindrische Stange oder das Rohr (11) der Mittelachse (3) schwenken können oder auf einer zusätzlichen Achse schwenken können, das parallel zur Mittelachse (3) angeordnet ist, wobei jeder Lenkungssteuerhebel (17) durch eine Stange oder Platte gebildet wird, die sich innerhalb einer Ebene dreht, die senkrecht zur klappbaren Mittelachse (3) ist, wobei jeder Hebel (17) auf der Oberseite einen Griff oder Knopf für eine einfache Handhabung durch den Passagier aufweist, sie hat an der Unterseite einen Ring, ein Loch oder ein Kräuselungssystem, an dem eines der Enden einer einzelnen Schnur, Kabel oder Draht (58) zum Ziehen der Ruder (16) verheddert, verknotet oder befestigt werden kann, solche einen Schnur, Kabel oder Draht (58) zum Ziehen der Ruder (16), das horizontal in röhrenförmigen Führungen oder Ringen entlang den Außenkanten der hinteren Schwimmer (7) und / oder der hinteren schwimmenden Plattform (2) verläuft, sodass durch Vorwärtsschieben eines der Lenksteuerhebel (17) die Schnur, Kabel oder Draht (58) beide parallelen Ruder (16) synchron in die gewünschte Richtung zieht, während der andere Lenksteuerhebel (17) gleichzeitig zurückgezogen wird, weil der andere Lenksteuerhebel (17) ihn durch die Schnur, Kabel oder Draht (58) zum Ziehen der Ruder (16) zurückzieht, und durch Zurückdrücken eines oder der beiden Lenksteuerhebel (17) die Schnur, das Seil oder das Seil (58) zum Ziehen der Ruder (16) gelöst wird, sodass um den Effekt des Festhaltens oder Lockerns der Schnur, Kabel oder Draht (58) zum Ziehen der Ruder (16) zu erleichtern, können die Lenksteuerhebel (17) um einen vorbestimmten Winkel gebogen werden, sodasses nicht notwendig ist, das Rudersteuerungssystem zu lösen, um das Tretboot zu falten, weil die Rudersteuerhebel (17) in dieser Situation automatisch zurückgeschwenkt werden, wenn das Tretboot gefaltet ist, wobei oberen Enden mit Griffen zwischen den schwimmenden Plattformen (1, 2) auf jeder Seite des Tretbootes geschützt und auf diese Weise die unteren Enden werden dank der seitlichen Transporträder (18) vor Bodenberührungen geschützt.

8. Ein kleines einsitziges Tretboot nach Patentanspruch 7, bei dem jeder vordere und hintere Schwimmer (6, 7) weist mindestens ein kleines Rad (49) auf, das symmetrisch in Bezug auf die vertikale Längssymmetrieebene angeordnet ist, die durch die Mitte des Bootes verläuft, und sich senkrecht von der vertikalen Längssymmetrieebene aus nach unten erstreckt jeder Schwimmer (6, 7), mit diesen kleinen Rädern (49), die beim Transport über dem Boden helfen, wenn das Tretboot ausgeklappt ist, dessen geringe Größe dem Vormarsch in der Navigation jedoch wenig Wasserfestigkeit verleiht, wobei ermöglicht wird, dass das Tretboot stehen kann, ohne zu fallen, indem es gleichzeitig auf den beiden seitlichen Transporträdern (18) und auf den Paaren der unteren kleinen Räder (49) abgestützt wird.

9. Ein kleines einsitziges Tretboot nach Patentanspruch 8, bei dem eine Kurbelwelle mit zwei Pedalen (30) ist so konfiguriert, dass sie sich frei um eine horizontale Achse quer zum Tretboot dreht, indem die Enden der Kurbelwelle in ein Paar Lager (31) eingebracht werden, die symmetrisch an der vorderen U-förmigen Rohrstange (20) verschraubt oder befestigt sind, und/oder, für den Fall, dass die horizontale Verschiebungsebene der Achse der Kurbelwelle oberhalb der vorderen Schwimmer (6) angeordnet ist, diese Pedale (30) sind mit zwei seitlichen Schaufelrädern (32) verbunden, die an vergrößerten Enden der Kurbelwelle angeordnet sind, die an beiden Seiten des Tretbootes außerhalb der vorderen Schwimmer (6) seitlich hervorstehen, sodass das Tretboot ohne Störung mit diesem geklappt werden kann.

10. Ein kleines einsitziges Tretboot nach Patentanspruch 9, bei dem eine klappbare und abnehmbare Rückenlehne (35) um eine horizontale Achse quer zum Tretboot frei schwenkbar ist, wobei die Achse durch mindestens eine zylindrische Stange (50) gebildet wird, die mit Kappen und Scheiben (52) und Stiften (51) befestigt ist, diese zylindrische Stange (50) durchbohrt eine Reihe von quer parallelen koaxialen Rohren (53), die an dem hinteren Ende der zentralen horizontalen Oberfläche (5) der hinteren schwimmenden Plattform (2) befestigt sind, und weiteren parallelen koaxialen Querrohren (54), die am Boden des befestigt sind, gefädelt sind Rückenlehne (35), mit der Besonderheit, dass die klappbare Rückenlehne (35) einige hintere Haken aufweist, an denen der mittlere Teil einer U-förmigen Stange (34) mit kreisförmigem Querschnitt eingehängt oder befestigt werden kann, deren untere Enden sich in einem Paar Quergelenke (33) einschwenken, die symmetrisch mit der hinteren U-förmigen Rohrstange (21) verschraubt sind, um zu verhindern, dass die Rückenlehne (35) unter ihr Eigengewicht oder das Gewicht des Insassen fällt, sodass dieses Merkmal verhindert, dass die Rückenlehne (35) unter ihr eigenes Gewicht oder das Gewicht des Passagiers fällt, wodurch die Neigung der Rückenlehne (35) durch die horizontale Verschiebung der hinteren U-förmigen Rohrstange (21) eingestellt werden kann.

11. Ein kleines einsitziges Tretboot nach Patentanspruch 11, bei dem Oberseite der hinteren schwimmenden Plattform (2) und der hinteren Schwimmer (7) und an beiden Seiten des Sitzes und des Beifahrers befinden sich zwei Truhen oder Kästen (59), die in Bezug auf das Tretboot in Längsrichtung angeordnet sind oben, sodass diese Truhen oder Kästen (59) als seitliche Aufbewahrung von Gegenständen dienen können, und wessen Kästen in derselben Form wie die hintere Schwimmplattform (2) geformt werden können, oder welche Kästen als lösbare Elemente ausgebildet sind, die mit Stiften oder Schrauben befestigt sind, die Kästen mit kleinen Löchern für die Wasserableitung und einen Deckel (60), der an einem Scharnier (61) an der Seite oder an der Rückseite schwenkt, das an seiner entsprechenden Truhe oder Kästen (59) schließ, die Deckel (60) eine optimierte Form haben, um als Armlehnen für den Komfort des Passagiers zu dienen, wobei ein Behälter (64) als eine Aussparung oder ein Loch (64) in der Oberfläche jedes der vorderen Schwimmer (6) der vorderen schwimmenden Plattform (1), in die jedem jeweilige Truhe oder Kästen (59) mit ihrem Deckel (60) passt, wenn das Tretboot zusammengeklappt ist, wodurch das Tretboot vollständig zusammengeklappt werden kann.

Revendications

1. Un petit pédalo monoplace pliable autour d'un axe transversal central, comprenant:

- une plate-forme flottante avant (1) et une plate-forme flottante arrière (2) lesquelles sont symétriques par rapport à un plan de symétrie longitudinal vertical passant par le centre du bateau, de manière à pouvoir être repliées et ensemblées l'une sur l'autre en pivotant l'une par rapport à l'autre 180 ° autour d'un axe central (3) transversal par rapport au bateau;

dans lequel ledit axe central (3) est formé par une barre ou tube cylindrique (11), qui est logé dans des tubes creux transversaux (9, 10) qui sont alignés coaxialement, et la barre ou tube cylindrique (11) étant confinée par des bouchons (12) et des broches (13) dans les tubes creux transversaux (9,10), avec un ou plusieurs des tubes étant reliés à la plate-forme flottante avant (1) et un ou plusieurs des tubes étant reliés à la plate-forme flottante arrière (2), de sorte que l'axe (3) sert de charnière pour plier le bateau;
dans lequel chacune des deux plates-formes flottantes (1) et (2) présente une surface horizontale centrale (4, 5), placée au-dessus du niveau de l'eau, qui relie de manière rigide deux flotteurs allongés longitudinalement, de sorte qu'il y a deux avants (6) dans la plate-forme flottante avant (1) et deux arrières (7) dans la plate-forme flottante arrière (2), tous deux symétriques par rapport au plan de symétrie longitudinal vertical passant par le centre du bateau, de sorte que, lorsque le pédalo est déplié de sa position repliée en tournant l'une des deux plates-formes flottantes (1, 2) 180° autour de l'axe transversal central (3), le flotteur avant (6) et le flotteur arrière (7) de chaque côté du bateau constituent dans l'ensemble la forme extérieure d'un seul flotteur longitudinal allongé, hydrodynamique et continu, dont les surfaces sont continues, sans discontinuités ou ouvertures pour améliorer le flux de l'eau pendant la navigation, et les surfaces horizontales centrales (4, 5) forment une surface plane approximativement horizontale avec de petites bosses ou de faibles pentes pour être utilisée ou adaptée comme un siège ou comme une surface afin que le passager puisse se coucher;
caractérisé par:

- deux barres tubulaires en forme d'U, l'une (20) à l'avant et l'autre (21) à l'arrière de l'embarcation lorsqu'elle est en position dépliée, toutes deux de section transversale carrée, rectangulaire, polygonale, circulaire ou elliptique et symétriques par rapport au plan de symétrie longitudinal vertical passant par le centre du bateau, dans lequel lesdites barres tubulaires en forme d'U (20, 21) peuvent coulisser longitudinalement, soit dans un même plan horizontal, soit chacune dans un plan horizontal différent;

- une pluralité de pièces, bosses, protubérances ou élargissements (22, 26) des plates-tormes flottantes (1, 2), placés près de la proue et de la poupe, respectivement, des plates-formes flottantes (1, 2), et symétriquement par rapport au plan de symétrie vertical passant par le centre du bateau, chacun d'eux étant traversé pour former un trou, creux, rainure ou fente (23, 27) longitudinal;

- au moins une première paire de trous, creux, rainures ou fentes (25, 28) longitudinaux et mutuellement parallèles dans la plate-forme flottante arrière (2) s'étendant dans le sens longitudinal le long sa surface horizontale centrale (5) adjacente au centre du bateau, et au moins une deuxième paire de trous, creux, rainures ou fentes (24, 29) longitudinaux et parallèles dans la plate-forme flottante avant (1) s'étendant dans le sens longitudinal le long sa surface horizontale centrale (4) adjacente au centre du bateau, ladite au moins une deuxième paire (24, 29) étant alignée avec ladite au moins une première paire (25, 28) à l'état non plié du bateau, de sorte que les creux, rainures ou fentes (24, 39) et (25, 28) consécutifs,dans les plates-formes flottantes avant (1) et arrière (2), respectivement, forment un trou, creux, rainure ou fente unique et continu traversant les deux plates-formes flottantes (1, 2), dans lequel chaque extrémité de la barre tubulaire avant en forme d'U (20) est reçue successivement dans au moins trois trous, creux, rainures ou fentes, en l'introduisant d'abord dans un trou, un creux, une rainure ou une fente (23) d'une des pièces, bosses, protubérances ou élargissements (22) placés près de la proue, puis en la faisant glisser horizontalement à travers deux trous, creux, rainures ou fentes (24, 25) consécutifs dans la plate-forme flottante avant (1) et dans la plate-forme flottante arrière (2) respectivement, et dans lequel chaque extrémité de la barre tubulaire arrière en forme d'U (21) est reçue successivement dans au moins trois trous, creux, rainures ou fentes, en l'introduisant d'abord dans un trou, creux, rainure ou fente (27) d'une des pièces, bosses, protubérances ou élargissements (26) placés près de la poupe, puis en la faissant glisser horizontalement à travers deux trous, creux, rainures ou fentes (28, 29) consécutifs du la plate-forme flottante arrière (2) et dans la plate-forme flottante avant (1), respectivement, de manière à empêcher le repliement du pédalo, tandis que, en faisant coulisser longitudinalement les extrémités de la barre tubulaire avant en forme d'U (20) dehors des trous, creux, rainures ou fentes (25) de la plate-forme flottante arrière (2), et en faisant coulisser longitudinalement les extrémités de la barre tubulaire arrière en forme d'U (21) dehors des trous, creux, rainures ou fentes (29) de la plate-forme flottante avant (1), le bateau peut être replié, de sorte que, dans le cas où les deux barres tubulaires en forme d'U (20), 21) ont le même plan de glissement horizontal, les paires de trous, creux, rainures ou fentes (24, 25, 28, 29) dans les plates-formes flottantes avant et arrière (1, 2), respectivement, adjacentes au centre du bateau, sont toutes placées dans le même plan, de sorte que les paires des trous, creux, rainures ou fentes (25) de la plate-forme flottante arrière (2) recevant les extrémités de la barre tubulaire avant en forme d'U (20) coïncident avec la paire des trous, creux, rainures ou fentes (28) dans la plate-forme flottante arrière (2) recevant les extrémités de la barre tubulaire en forme d'U (21) arrière, tandis que la paire de trous, creux, rainures ou fentes (24) dans la plate-forme flottante avant (1) recevant les extrémités de la barre tubulaire avant en forme d'U (20) coïncident avec la paire des trous, creus, rainures ou fentes (29) de la plate-forme flottante avant (1) recevant les extrémités de la barre tubulaire arrière en forme d'U (21), et les extrémités des barres en forme d'U (20, 21) étant finies de manière à permettre leur emboîtement ou leur couplage mutuel.

2. Petit pédalo monoplace selon la revendication 1, dans lequel chaque barre tubulaire en forme d'U (20) et (21) présente une paire de trous (36) et (42), respectivement, symétriquement par rapport au plan de symétrie verticale passant par le centre du bateau, chaque trou pratiqué ou percé verticalement à travers d'un bras de la barre tubulaire en forme d'U (20, 21) correspondant, de sorte que chaque barre tubulaire en forme d'U (20) et (21) coulisse jusqu'à une position longitudinale prédéfinie correcte par rapport au pédalo où une broche de fixation (38, 44) est insérée dans son trou (36, 42) respectif, lequel à son tour traverse au moins l'un d'un une paire d'autres trous coaxiaux percés symétriquement dans les pièces, bosses, protubérances ou élargissements (22, 26) des plates-formes flottantes (1, 2) près de la proue et de la poupe, respectivement, dans lequel les positions longitudinales où ces trous (36, 42) sont percés dans leur barre tubulaire en forme d'U (20, 21) respective sont disposées de telle sorte que lorsque chaque paire de broches de fixation (38, 44) croise simultanément les paires de trous (36, 42) de la barre tubulaire en forme d'U (20, 21) respective et aussi les paires de trous traversant les pièces, bosses, protubérances ou élargissements (22, 26) de la plate-forme flottante correspondante (1, 2), cette barre tubulaire en forme d'U (20, 21) est bloquée, rendant impossible son déplacement et sa sortie du pédalo pliable, alors qu'en même temps, les extrémités de leurs bras ne sont pas introduites dans les trous, creux, rainures ou fentes (25, 29) adjacents au centre du bateau de la plate-forme flottante (1) ou (2) en face, de sorte que le pliage du bateau autour de son axe central (3) n'est pas empêché, et dans lequel en joignant les deux barres tubulaires en forme d'U (20, 21) bloquées lorsque le pédalo est complètement replié, elles peuvent être utilisées comme poignée pour traîner et transporter le pédalo pliable comme un chariot ou caddie à deux roues.

3. Petit pédalo monoplace selon la revendication 2, dans lequel chaque barre tubulaire en forme d'U (20, 21) présente deux fentes verticales longitudinales parallèles (37, 43), respectivement, qui traversent chacune d'elles un bras de chaque barre tubulaire en forme d'U (20, 21), les fentes étant parallèles aux bras et disposées symétriquement par rapport au plan de symétrie longitudinal vertical passant par le centre du pédalo, dans lequel à l'intérieur de ces deux paires de fentes verticales longitudinales parallèles (37, 43) deux paires de broches de fixation verticales (38, 44) peuvent être insérés, respectivement, lorsque ces paires de broches de fixation (38, 44) traversent consécutivement les trous verticaux pratiqués ou percés à travers les pièces, bosses, protubérances ou élargissements (22, 26) et ces fentes verticales longitudinales parallèles (37, 43), de sorte que chaque barre tubulaire en forme d'U (20, 21) peut se glisser et se déplacer longitudinalement une distance égale à la longueur de la paire respective de ses fentes verticales longitudinales parallèles (37, 43) entre deux positions longitudinales déterminées par sa position et sa longueur dans la même barre tubulaire en forme d'U (20, 21), de sorte qu'elles servent de butée ou de limite au déplacement des barres tubulaires en forme d'U (20, 21), et entre ces deux limites de déplacement respectifs, les deux barres tubulaires en forme d'U (20, 21) ont toujours, lorsque le pédalo est en position dépliée, les extrémités de ses bras placées à l'intérieur des paires des trous, creux, rainures ou fentes (25) ou (29) longitudinaux adjacents au centre du pédalo de la plate-forme flottante (1) ou (2) en face, en empêchant le pliage du pédalo, bien que les deux barres tubulaires en forme d'U (20, 21) puissent coulisser longitudinalement.

4. Petit pédalo monoplace selon la revendication 3, dans lequel une fois le pédalo est plié, le segment transversal central des deux barres tubulaires en forme d'U (20, 21) s'emboîte l'une dans l'autre ou l'une à côté de l'autre, lesdites barres tubulaires en forme d'U (20, 21) étant éventuellement courbées ou incurvées pour faciliter cet ajustement, où les barres tubulaires en forme d'U (20, 21) peuvent être réunies et ancrées par des pièces en matière plastique (48) avec des crochets, des fermoirs ou des languettes d'ancrage servant à la fois de poignée de traction pour traîner le pédalo par terre, et aussi de système qui empêche la rotation mutuelle des plates-formes flottantes (1, 2) autour de son axe central transversal (3), évitant ainsi un dépliage et déploiement accidentel à terre.

5. Petit pédalo monoplace selon la revendication 4, dans lequel les extrémités de la barre ou tube cylindrique (11) servant d'axe de pliage (3) du pédalo font saillie latéralement des deux côtés d'une distance supplémentaire, de sorte qu'il est possible d'enfiler dans ces extrémités deux roues de transport latérales (18), fixées auxdits bouchons (12) et fixées avec lesdites broches (13) à la barre ou tube cylindrique (11), de sorte que ces deux roues de transport latérales (18) permettent au pédalo d'être facilement traîné ou poussé par terre comme une valise, caddie ou chariot à roulettes lorsqu'il est plié ou même déplié si les roues (18) ont d'une taille suffisante.

6. Petit pédalo monoplace selon la revendication 4 ou la revendication 5, dans lequel lorsque le pédalo est déplié et la paire de broches de fixation (38, 44) est insérée simultanément dans les paires respectives de fentes verticales longitudinales parallèles (37, 43) des barres tubulaires en forme d'U (20, 21) et dans les paires des trous traversant les pièces, bosses, protubérances ou élargissements (22, 26) des flotteurs (6, 7), les deux barres tubulaires en forme d'U (20, 21) peuvent être déplacées longitudinalement et ajustées à des distances intermédiaires entre les deux limites de déplacement données respectivement par la longueur de chacune des paires de fentes verticales longitudinales parallèles (37, 43), de sorte que les positions de déplacement intermédiaires sont dues par une paire de boulons, goupilles ou verrous (39, 46) pour chaque barre tubulaire en forme d'U (20, 21), placés symétriquement par rapport au plan de symétrie vertical qui traverse le centre du pédalo et par rapport à la barre tubulaire en forme d'U (20, 21) respective, pouvant basculer autour de petites charnières (40) ou coulisser en utilisant des goupilles pour les empêcher de sortir de leurs trous, dans lequel lesdites paires de boulons, goupilles ou verrous (39, 46) peuvent être insérés ou montés dans lesdites positions intermédiaires prédéfinies en utilisant deux rangées de rainures, fentes ou trous (41, 47), de sorte que chacune de ces paires de rangées est placée sur l'une des plates-formes flottantes (1, 2), symétriquement par rapport au plan de symétrie longitudinal vertical passant par le centre du pédalo, de sorte que, pour que l'utilisateur puisse utiliser ses mains pour saisir facilement les boulons, goupilles ou verrous (46) basculants ou coulissants, il y a une paire de barres de connexion (45) qui sont droites, courbées, courbées en forme de L ou courbées en forme de Z, et aussi boulonnées ou rivetées sur la barre tubulaire arrière en forme d'U (21), et contiennent les boulons, goupilles ou verrous (46) basculants ou coulissants (46) afin de pouvoir être insérés dans la rangée de rainures, fentes ou trous (47) de la plate-forme flottante arrière (2) utilisés pour le réglage du dossier (35).

7. Petit pédalo monoplace selon la revendication 6, dans lequel se trouvent deux leviers de commande de direction (17), chaque placé à un côté du pédalo et chaque placé aux deux côtés extérieurs des plates-formes flottantes (1, 2) et pouvant pivoter autour de la barre ou tube cylindrique (11) de l'axe central (3), ou au lieu de cela placé sur un axe supplémentaire parallèle à l'axe central (3), dans lequel chaque levier de commande de direction (17) est formé par une tige ou une plaque qui tourne perpendiculairement à l'axe (3) de pliage, dans lequel chaque levier de commande de direction (17) a sur le dessus une poignée ou un bouton pour faciliter la prise en main par le passager, et sur le dessous, un anneau, un trou ou un système de sertissage sur lequel une des extrémités d'un seul cordon, câble ou corde (58) pour contrôler les safrans (16) peut être emmêlé, noué ou fixé, ledit cordon, câble ou corde (58) passant horizontalement à l'intérieur de guides ou d'anneaux en forme de tubes le long des bords extérieurs des flotteurs arrière (7) et/ ou de la plate-forme flottante arrière (2), de sorte que, en poussant vers l'avant l'un des leviers de commande de direction (17), le cordon, câble ou cordee (58) entraîne les deux safrans parallèles (16) vers la direction souhaitée de manière synchronisée tandis que l'autre levier de commande de direction (17) est tiré en même temps, dans lequel, pour faciliter cet effet de maintenir serré ou desserré le cordon, câble ou corde (58) pour contrôler les safrans (16), les leviers de commande de direction (17) peuvent être courbés un angle prédéterminé, donc il n'est pas nécessaire de désengager le système de commande du gouvernail pour plier le pédalo, car les leviers de commande de direction (17) sont pivotés automatiquement dans cette situation de pliage, en protégeant et introduisant automatiquement leurs extrémités supérieures avec ses poignées entre les plates-tormes flottantes (1, 2) de chaque côté du pédalo et en protégeant leurs extrémités inférieures du contact avec le sol par les roues de transport latérales (18).

8. Petit pédalo monoplace selon la revendication 7, dans lequel chaque flotteur avant et arrière (6, 7) comprend au moins une petite roue inférieure (49) placée symétriquement par rapport au plan de symétrie longitudinal vertical passant par le centre du pédalo et s'étendant verticalement vers le bas depuis le plan longitudinal vertical de symétrie de chaque flotteur (6, 7), ce qui facilite le transport à terre lorsque le pédalo est déplié, mais dont la petite taille offre peu de résistance pour avancer lors de la navigation, tout en permettant au pédalo de rester debout sans se tomber en étant soutenu simultanément sur les deux roues de transport latérales (18) et les paires de petites roues inférieures (49).

9. Petit pédalo monoplace selon la revendication 8, dans lequel un vilebrequin à deux pédales (30) est configuré pour tourner librement autour d'un axe horizontal transversal au pédalo en plaçant les extrémités du vilebrequin à deux pédales (30) dans d'une paire de paliers (31) vissés symétriquement ou fixés à la barre tubulaire avant en forme d'U (20), où ces pédales (30) sont reliées à au moins une roue à palettes (32) centrale placée entre les deux pédales (30) et/ou, dans le cas où le déplacement horizontal de l'axe du vilebrequin serait placé au-dessus des flotteurs avant (6), sont reliées à deux roues à palettes (32) latérales placées aux extrémités du vilebrequin qui font saillie latéralement des deux côtés du pédalo à l'extérieur des flotteurs avant (6), afin que le pédalo puisse être plié sans interférence avec ceux-ci.

10. Petit pédalo monoplace selon la revendication 9, dans lequel un dossier pliable et amovible (35) pivote librement autour d'un axe horizontal transversal au pédalo, ledit axe étant formé par au moins une tige ou une barre cylindrique (50) fixée avec des capuchons et des rondelles (52) et des broches (51), ladite flietant une série de tubes transversaux coaxiaux parallèles (53) fixés sur le côté arrière de la surface horizontale centrale (5) de la plate-forme flottante arrière (2), et d'autres tubes transversaux coaxiaux parallèles (54) fixés dans le fond du dossier (35), avec la particularité que ledit dossier rabattable (35) présente des crochets arrière sur lesquels la partie médiane d'une barre en forme d'U (34) de section transversale circulaire peut être accrochée ou fixée, et ses extrémités inférieures en pivotant dans une paire de charnières transversales (33) vissées symétriquement à la barre tubulaire arrière en forme d'U (21), pour empêcher le dossier (35) de se plier ou se tomber sous son propre poids ou sous celui du passager, permettant l'inclinaison du dossier (35) à régler par le déplacement horizontal de la barre tubulaire arrière en forme d' U (21).

11. Petit pédalo monoplace selon la revendication 11, dans lequel sont disposés, de part et d'autre du haut de la plate-forme flottante arrière (2) et des flotteurs arrière (7), et des deux côtés du siège et du passager, deux coffres ou coffrets (59), disposés longitudinalement par rapport au pédalo , ouverts vers le haut, dont peuvent servir de réceptacles latéraux (59) pour ranger des objets, et qui peuvent être moulées dans le même moule que la plate-forme flottante arrière (2), ou qui sont constituées en éléments amovibles fixés avec des broches ou des vis, Ises boîtes ayant de petits trous pour l'évacuation de l'eau et un couvercle (60) qui pivote sur une charnière (61) latérale ou arrière qui se ferme sur son coffre ou coffret (59) correspondant, lesdits couvercles (60) ayant une forme optimisée pour servir d'accoudoirs pour le confort du passager, dans lequel un réceptacle (64) est formé d'un creux ou d'un trou (64) au sommet de chacun des flotteurs avant (6) de la plate-forme flottante avant (1), à chacun de lesquels chaque coffre ou coffret (59) avec son couvercle (60) correspond et convient parfaitement lorsque le pédalo est plié, permettant ainsi pliage du pédalo.

Drawing