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(11) | EP 1 254 072 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
HAND HOLDABLE PUMP SPRAY APPARATUS VON HAND BETÄTIGBARES PUMP-SPRÜHGERÄT APPAREIL PORTATIF DE VAPORISATION A POMPE |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
TECHNICAL FIELD
[0001] The present invention relates to a hand holdable pump spray apparatus and more particularly to a hand holdable pump spray which is reliable, easy to use, safe and inexpensive.
BACKGROUND ART
[0002] Non-aerosol pump spraying devices have been developed primarily to eliminate the use of propellants which have a detrimental effect on the environment and to eliminate the use of pressurized containers which pose a safety hazard. Pressurized containers may explode and cause injury, and when the containers have ingredients such as insecticide, weed and grass killer and fertilizer, there may be undesirable environmental affects. Examples of non-aerosol pump spray apparatus may be seen by reference to U.S. Patents Nos. 2,789,396; 5,938,116; 5,918,782; 5,860,574; 5,816,447; 5,810,211 and 4,174,055.
[0003] A drawback to all of such non-aerosol pump apparatus is that the pump device is located in the container having the liquid to be pumped. There is then a flexible tube connecting the container to a hand holdable spray device or "wand". Typically, the container is sold as a disposable unit to be discarded when there is no more liquid to be pumped. This results in a relatively high cost to both the manufacturer and the consumer because the pump mechanism, located within the container, is also discarded along with the container. Another problem of pump-in-container designs is that the hand held wand must be set down or held in an awkward position when the pump is to be operated because two hands are necessary to manipulate the pump. For example, when it comes time to operate the spraying device, the pump must be activated to pressurize at least part of the system. Usually this means there is a need to pull upwardly on a handle attached to a piston located in the container. While this is done with one hand, the other hand must hold the container "down" to counteract the upward pull on the handle. Hence, it is difficult to also hold the wand at the same time.
[0004] There are also safety issues made especially more relevant because of the nature of the liquid being sprayed. First, there is a need to have a sealed container when it is shipped from the factory and again when it is stored by a consumer. Further, there may also be a safety problem regarding pressurized liquid contained in the flow path from the container to the spray device.
[0005] The numerous prior attempts to improve upon non-aerosol pump spray devices have yet to produce an optimal system.
DISCLOSURE OF THE INVENTION
[0006] The difficulties encountered by the previous devices have been overcome by the present invention. What is described here is a hand holdable pump spray apparatus characterized by:
a housing having first and second end portions, said housing being spaced from a reservoir of fluid to be sprayed;
a piston being movable in said housing between said first and said second end portions;
a first chamber in said housing between said piston and said second end portion, said first chamber being formed and/or enlarged when said piston is moved toward said first end portion, said first chamber being in operative communication with the spaced apart reservoir of fluid to be sprayed;
a handle connected to said piston adapted to be operated by a user of said hand holdable pump spray apparatus to move said piston toward said first end portion of said housing;
a first spring operably connected to said piston to bias said piston toward said second end portion of said housing, to provide a biasing force against fluid in said first chamber;
a first valve positioned between the fluid reservoir and said first chamber, said first valve being open when said handle is operated to move said piston toward said first end portion of said housing;
a nozzle operatively connected to said housing and positioned to receive fluid from said first chamber;
a second valve separating said chamber from said nozzle; and
an actuator operatively connected to said second valve for opening said second valve to pass fluid from said first chamber to said nozzle.
[0007] There are a number of advantages, features and objects achieved with the present apparatus not available in prior devices. For example, one advantage is that the present invention provides a non-aerosol hand holdable pump spray apparatus having the pump contained in the wand, thereby eliminating prior potential safety hazards relative to pressurized liquid in the flow path. Another advantage of the present invention is that it enables elimination of various previously required components. Yet another advantage of the present invention is that the pump spray wand and the container combination is relatively inexpensive and that the container is disposable after use but the pump mechanism in the wand is separate and may be reused. Still another feature of the present invention is to provide a simple container valve whose position is visually apparent to ensure that the container is sealed when not in use or when it is transported, thereby preventing inadvertent leakage of possibly environmentally hazardous liquids. A further feature of the present invention is to enable the container to be emptied more completely than can be accomplished by prior pump spray devices. A further object of the present invention is that the wand is reliable, easy to use, inexpensive and safe.
[0008] A more complete understanding of the present invention and other advantages, objects and features thereof will be gained from a consideration of the following preferred embodiments read in conjunction with the accompanying drawings provided herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009]
FIG. 1 is a front elevation view of a hand holdable pump spray system.
FIG. 2 is an enlarged front elevation view, partially broken away showing a hand holdable pump spray system as it would be in storage or during shipping and further illustrating a container safety valve in a closed position in solid line and in an open position in phantom line.
FIG. 3 is a sectional view taken along line 3-3 of FIG. 2 but without the hand holdable wand.
FIG. 4 is an enlarged sectional elevation view of a variation valve cap for the container, where the valve is shown in a closed position.
FIG. 5 illustrates the valve cap of FIG. 4 with the valve in an open position and connected to a supply tube.
FIG. 6 is an enlarged front elevation view of an embodiment of a hand holdable pump spray apparatus.
FIG. 7 is a side elevation view of the hand holdable pump spray apparatus shown in FIG. 6.
FIG. 8 is a top plan view of the hand holdable pump spray apparatus shown in FIGS. 6 and 7.
FIG. 9 is a sectional view taken along line 9-9 of FIG. 8.
FIG. 10 is an enlarged sectional view taken within the circle 10-10 of FIG. 6 showing the valve in the apparatus in a closed position.
FIG. 11 is a partial view like that shown in FIG. 10 except the illustrated valve is shown in an open position.
FIG. 12 is an enlarged section view taken along line 12-12 of FIG. 10.
FIG. 13 is an enlarged section view taken within the circle 13-13 of FIG. 8.
FIG. 14 is a section view taken along line 14-14 of FIG. 13 showing a handle of the hand holdable spray apparatus in a restrained position.
FIG. 15 is a view of the handle shown in FIG. 14 in an unrestrained position.
FIG. 16 is an elevation view, partially diagrammatic, of a variation of the present invention with part of the casing removed to show the internal mechanism.
FIG. 17 is an enlarged sectional elevation view of the variation shown in FIG. 16.
FIG. 18 is a sectional elevation view of the variation of FIG. 16 illustrating the filling of the hand holdable spray apparatus.
FIG. 19 is a sectional elevation view of a further embodiment similar to the embodiment shown in FIGS. 16-18 but illustrating the use of a pulley to reduce the force needed to fill the hand held spray apparatus.
FIG. 20 is a sectional elevation view of the embodiment of FIG. 19 with the handle extended.
FIG. 21 is an elevation view of another embodiment of the pump spray apparatus of the present invention.
FIG. 22 is a perspective view of another embodiment of a pump spray apparatus of the present invention.
FIG. 23 is a perspective view of yet another embodiment of the present invention illustrating a pump spray apparatus attached to the top of a container.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010] While the present invention is open to various modifications and alternative constructions, the preferred embodiments shown in the drawings will be described herein in detail. It is understood, however, that there is no intention to limit the invention to the particular forms disclosed. On the contrary, the intention is to cover all modifications, variations, equivalent structures and methods, and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.
[0011] Referring now to FIG. 1, the hand holdable non-aerosol pump spray system is defined generally to include a container 10 acting as a liquid reservoir, to which is connected a supply tube 12 which in turn is connected to a hand holdable pump spray apparatus or wand 14. As mentioned, there are a number of advantages to having a pump placed in the wand rather than in the container as shown in the earlier patents listed above. By placing the pump in the wand, the pump is much easier to use. There is no need to release the wand nor to hold it in an awkward position when operating the pump. A user can use one hand to hold the wand 14 while the other hand draws back the pump's piston as will be explained below. When this is being done, there is no need to hold down or even to touch the container itself; unlike the previous devices, there is no need to hold the container down in opposition to an upward force on the pump because there are no additional forces acting upon the container when the pump of the present invention is manipulated. A second major feature is that manufacturing costs are reduced. This comes about in two ways. First, the placement of the pump in the wand simplifies the design and reduces the number of parts thereby reducing cost. Second, not having the pump mechanism in the container means that the disposable container is a much cheaper item to make.
[0012] Another advantage relates to the handling of liquid in the container. Because it may not be desirable to directly touch the liquid in the container 10, even though only a relatively small residual amount is left after use, it is desirable and often necessary to dispose of the container. By having the pump mechanism in the wand, the wand and the supply tube may be disengaged from the container and used again with a new, completely filled container. The wand and supply tube are simply disconnected from the spent container and the container is sealed using a simple but effective valve.
[0013] Referring now to FIGS. 2 and 3, the container will be described in more detail. The container may be made of any suitable synthetic resin, such as high density polyethylene, using a blow molding technique, to achieve a container having an integral handle 20, a spout 22 and a storage sleeve or compartment 24. A special safety cap 26 is also provided. This cap has a pivotal valve 28. The pivotal valve provides a safety feature. It allows a user to determine by simple visual inspection whether the valve is open or closed. The pivotal valve 28 is connected to the top of the cap 26 which in turn is attached or threaded to the container spout 22. The pivotal valve includes a central opening 30 which forms a passageway from a first end 32 of the valve toward an opposite end portion 34. Connected to the end portion 34 in any suitable fashion is the supply tube 12.
[0014] The valve is pivotally mounted to the cap. The first end 32 rotates from a position shown in solid line in FIG. 2, where the valve 28 is generally horizontal, as is the central opening 30, to a position shown in phantom line where the valve 28 is generally vertically aligned. This vertical position allows the central opening 30 to align with a liquid transferring internal tube 36 extending downwardly from the cap 26 to or very near the bottom 39 of the container 10. By having this central opening 30 aligned with the internal tube 36, there is a direct passageway between a liquid 38 in the container 10 and the wand 14. The passageway extends through the internal tube 36, the valve 28 and the supply tube 12. However, when the valve 28 is pivoted to its horizontal position, it can be seen that this passageway is closed or blocked between the internal tube 36 and the supply tube 12. This seals the liquid within the container. The pivoting valve is safe, relatively inexpensive and provides by visual inspection immediate information to a user or operator as to whether the container is open or closed.
[0015] A further advantage is that when the container is emptied, except for a residual, the container, the cap, and the internal tube may be properly discarded after the supply tube has been disconnected from the valve 28. It may now be appreciated that the elements of the system being made for disposal are simple and relatively inexpensive while the more complicated and expensive elements, such as the pump in the wand, are reuseable.
[0016] The storage/shipping sleeve 24 is provided to allow storage of the wand 14 when the system is shipped or stored. Between the sleeve and the container is an integral bridge flange 40. The flange provides a base around which the supply tube may be wrapped when the wand is placed in the sleeve. As shown in solid line in FIG. 2, the system is in condition to be shipped in a relatively compact arrangement and, of course, in a non-pressurized state. Again, this feature reduces costs and enhances safety.
[0017] Referring now to FIGS. 4 and 5, there is illustrated a variation of the cap and the valve connected to the top of the container. The modified cap 21 has an internal thread 23 for engaging a complementary thread (not shown) about the spout of the container. The cap 21 includes an integral sleeve 25 for receiving the upper end portion 27 of the internal tube 36. A slot 29 is formed in the top of the cap to which is pivotally mounted a valve element 31. The valve element 31 is generally tubular and includes a central passageway 33 for receiving a connector 35 affixed to the end of the supply tube 12. The connector has a central opening 45 and may engage the valve element 31 in the central passageway 33 as shown in FIG. 5. The valve element also includes an end opening 37 which communicates with the central passageway so that the valve element may have liquid pass through its entire longitudinal length. A vent opening 47 is also provided in the cap to allow pressure equalization during use, and a liquid opening 41 is provided to align with the internal tube 36 and the end opening 37 of the valve element 31 as shown in FIG. 5.
[0018] As with the valve embodiment in FIG. 2, the valve element 31 is closed when in the horizontal position as shown in FIG. 4. When horizontal, both the liquid opening 41 and the vent opening 47 are blocked so that the container is sealed. Also, because of the geometry of the slot 29 and the connector 35, the connector must be removed before the container is sealed. This is another safety feature because, if properly used, all of the liquid in the wand and the supply tube will be returned to the container as will be explained below.
[0019] When an operator wishes to dispense the liquid, the valve elements is pivoted upwardly about a pivot point 43 and the connector is plugged into the central passageway 33 as shown in FIG. 5. When the valve element is fully upright, there is a clear passage for the liquid in the container to the wand through the internal tube 36, the liquid opening 41, the end opening 37, the central passageway 33, the central connector opening 45, and the supply tube 12.
[0020] Referring now to FIGS. 6-9, the hand holdable pump spray apparatus is shown in more detail. The wand 14 includes a hand holdable tubular housing 44 having a first or left end portion 46 and a second or right end portion 48. Within the housing is a piston 50 movable between the first and the second end portions of the housing. Connected to the piston is a handle 54. A piston rod 52 joins the piston to the handle. The piston includes a front face 58 and a rear face 60. Between the rear face 60 of the piston and the first end portion of the housing is a first coil spring 62 which biases the piston toward the right or second end portion 48 of the housing. Attached to the left end portion 46 of the housing is a cap 64. Attached to the right end portion 48 of the housing is a nozzle 66. As will be explained below, the right end portion of the housing also contains two valves, two chambers and two springs.
[0021] Surrounding the housing about its right end portion is a trigger sleeve 68 including a thumb lever 70. Adjacent the nozzle 66 is a fluid return mechanism 72 and a connector 74 for engagement with the supply tube. Located between the front face 58 of the piston 50 and the right end portion 48 of the housing is a first or main chamber 80 into which the liquid 38 (FIG. 2) from the container is drawn when the handle 54 is moved by a user to the left or away from the cap 64. In FIGS. 6-9, the wand is shown in a relaxed or non-pressurized mode as it would be during shipment, storage or when the wand is removed from the container.
[0022] Referring now to FIGS. 10-12, the relative simplicity and reliability of the pump and spray mechanisms may be seen. The sectional view of FIGS. 10 and 11 is of the right end portion 48 of the housing 44. The supply tube 12 is attached to the connector 74 which communicates with a second or small chamber 82. Separating the small chamber 82 from the main chamber 80 is a first or intake valve 84, commonly called a check valve, which opens in one direction usually in response to a pressure differential across the valve. As the piston 50 (FIG. 9) is pulled to the left by a user, the main chamber 80 expands. This causes the pressure in the main chamber to decrease while the pressure acting on the liquid is atmospheric, thereby creating a pressure differential across the check valve 84. The pressure differential causes the valve to open, as shown in an exaggerated phantom line, and the liquid 38 to move from the container 10 through the supply tube and the small chamber 82 into the main chamber 80. In addition, as the piston 50 is pulled to the left, the coil spring 62 (FIG. 9) is steadily compressed. When the piston reaches the limit of its travel or the user stops the leftward movement of the handle, the main chamber 80 is filled with liquid and the spring 62 is completely or partially compressed. This compressed spring provides a biasing force against the rear face 60 of the piston and the liquid, thereby closing the check valve 84.
[0023] In parallel alignment with the check valve, there is a second valve including a valve stem 88 positioned within the housing at its right end portion. The valve stem has a central longitudinal opening 90, a first or left radial passage 92 and a second or right radial passage 94 close to the valve stem nose 93. A plug 96 seals the upstream end of the longitudinal opening 90. The second valve also includes a first O-ring seal 98 positioned about the outer circumference of the valve stem. The seal acts as a valve face. There is also included a second O-ring 100, a third O-ring 102 and a fourth O-ring 104 to seal various portions of the valve. There is also an outer threaded portion 106 about the circumference of the valve stem which engages an inner thread 108 on the nozzle 66. The threaded engagement of the valve stem and the nozzle ensures that they move or slide together when an external force is applied, and yet the nozzle and the valve stem may be moved relative to one another to adjust the spray projected from the nozzle. The nozzle 66 includes a rounded head 110 having a spray opening 112. Immediately internal to the nozzle and between the nozzle and the valve stem is a third or nozzle chamber 114. The nozzle also includes a ring shoulder 116, a ring edge 118 and an external shoulder 119.
[0024] The right end portion 48 of the housing includes a first sleeve portion 120 having an annular flange 122 about the outer circumference of the sleeve portion and an oblique annular surface 124 which functions as part of the second valve by being a valve seat. Between the flange 122 and the ring edge 118 is a second coil spring 126.
[0025] Positioned about a portion of the nozzle and the sleeve portion 120 is the trigger sleeve 68 which has an annular radially directed flange 130. This flange is constructed to abut the shoulder 119 of the nozzle. If the trigger sleeve is moved to the left by a user's thumb on the lever 70, FIGS. 6 and 7, it will cause the nozzle to slide to the left thereby moving the valve stem to the left and causing the O-ring seal or valve face 98 to move away from the oblique annular surface or valve seat 124 as shown in FIG. 11. When this happens, liquid represented by the arrow 132 may move around the end of the valve stem 88, past the valve face 98 and the valve seat 124, through an annular space 91 around the valve stem 88, through the radial passage 92, then to the longitudinal opening 90, through the radial passage 94, into the nozzle chamber 114 and out of the spray opening 112. When the user removes his thumb from the thumb lever 70, the second spring 126 will push the ring edge 118 of the nozzle to the right thereby causing both the nozzle and the valve stem to also slide rightwardly, which in turn, causes the valve face 98 and the valve seat 124 to abut each other to block the flow of liquid to the nozzle chamber 114.
[0026] Referring now to FIG. 12, the valve stem 88 includes a longitudinal slot 121 for receiving a longitudinally extending key 123. This mechanism is used to allow a user to rotate the nozzle relative to the valve stem while the valve stem is kept rotationally stationary. Nevertheless, the valve stem is allowed to move in a longitudinal direction in response to the rotation of the nozzle.
[0027] Referring now to FIGS. 13-15, there is illustrated another example of the elegant simplicity of the apparatus here. The left end portion 46 of the housing 44 is shown in more detail. The cap 64 is threadedly engaged with the housing and includes an outer surface 138 and a central opening 139. The central opening allows the piston rod 52 to extend beyond the end of the housing. The cap includes an arcuate flange 140 extending over an acute angle. Integral with the rod is an arcuate radially extending flange 142. When the piston 50 is in its most rightward position as generally shown in FIG. 9, the rod flange and the cap flange are in position to allow the rod flange to be trapped by the cap and the cap flange. The cap may also include a flange shape opening 143. Since the rod is cylindrical in form, it may be rotated from a trapped or restrained position as shown in FIGS. 13 and 14 to an untrapped or unrestrained position as shown in FIG. 15. In the trapped position, the pump is inoperative and unpressurized. This means that the first spring 62 is in a relaxed or almost relaxed condition. When in the restrained position, the rod flange and the opening 143 align and the rod flange slides into the opening and is restrained against rotation as well as outward linear movement. However, by backing the handle to the left and simply rotating the handle 54 a half turn, or 180°, the rod flange moves to the unrestrained position and the wand may be pressurized by the user or operator gripping the handle and pulling it to the left against the force of the compression spring.
[0028] Returning to FIG. 10 and as mentioned earlier, the liquid return mechanism 72 is provided as a safety feature to allow liquid in the main chamber 80 and the small chamber 82 to return to the container if it is not sprayed through the nozzle. This is done by forcing open the check valve 84. The liquid return mechanism includes a plunger 141, an activation button 145 and a third spring 144. The plunger 140 rides within a short second sleeve 146 of the housing 44 located in the right end portion 48. When the button 145 is pressed, it moves to the left by sliding on the outer circumference 148 of the second sleeve 146. In turn, an internal annular flange 150 of the button engages an annular shoulder surface 152 of the plunger causing the plunger to push against the check valve 84. This forces the check valve to open allowing the liquid in the main chamber 80 to enter the small chamber 82 and from there to the supply tube 12. From the supply tube, the liquid will flow back into the container 10. The driving force moving the liquid is provided by the first spring 62 (FIG. 9) applied to the rear face 60 of the piston 50.
[0029] Referring now to FIGS. 16, 17 and 18, there is shown yet another embodiment of the present invention. Illustrated is a hand holdable pump spray apparatus 200 including one-half of an outer casing 202 within which is a cylindrical housing 204 having a first or lower end portion 206 and a second or upper end portion 208. Within the housing is a movable piston 210 which travels between the first and the second end portions of the housing. A handle 212 is connected to the piston by a rod 214. A coil spring 216 is positioned around the rod and provides a biasing force to urge the piston toward the upper end portion 208 of the housing.
[0030] As can be best seen in FIG. 18, when the handle is extended, the coil spring 216 is compressed thereby increasing the biasing force against the piston. Extending the handle also creates a chamber 220 in the housing between the upper end portion 208 and the piston 210. This chamber is filled with the fluid or liquid to be sprayed as the piston is moved to the lower end portion 206.
[0031] A first or intake valve 222 is positioned at the end of an intake conduit 224 which is shown in diagrammatic form to be connected to a reservoir 226. It is understood that the reservoir may take the form of a liquid holding container, such as the container 10 shown in FIGS. 1 and 2. And as with the earlier mentioned embodiment of the hand holdable pump spray apparatus, it is intended that the apparatus be spaced from the container or reservoir as is shown in FIGS. 1 and 16. The intake valve consists of a loose ball 230 usually seated on a valve seat 232 and constrained by a cage 234. When the handle is extended, the chamber 220 is created and is at a lower pressure than the pressure on the liquid in the reservoir 226. Because of the pressure differential, the liquid will flow through the conduit 224 unseating the ball from the valve seat 232. The liquid will flow through the cage 234 and enter a second chamber or manifold 240. From there the fluid will enter the chamber 220. In this fashion, the hand holdable pump spray apparatus is primed for operation.
[0032] Ultimately, the liquid is to be expelled through a nozzle 242. However, between the chamber 220 and the manifold 240 is a second or outlet valve 244. This valve includes a slidable valve element 246, a coil spring 248 and an opening 250 in a conduit 252 which leads to the nozzle. An actuator 254 is attached to the outer casing 202. The actuator includes an operating button 255, a pivot shaft 256 and an extended arm 258. The extended arm is connected to the slidable valve element 246 so that when the operating button 255 is depressed, it and the arm rotate in a counterclockwise direction causing the valve element 246 to slide to the left and compress the spring 248. By sliding to the left, the valve element exposes the opening 250 to the liquid in the chamber and the manifold. When the operating force on the button 255 is relieved, the coil spring 248 will bias the arm and the button to pivot clockwise thereby returning the valve element 246 to its original position as shown in FIG. 17. As can now be appreciated, the hand holdable pump spray apparatus 200 is simple, reliable and inexpensive as well as being easy to use and efficient in operation.
[0033] Referring to FIGS. 19 and 20, there is illustrated another embodiment of a hand holdable pump spray apparatus 280 which includes an outer casing 282, a cylindrical housing 284, an internal piston 286 and a handle 288. As in the previous embodiments, the housing has a first end portion 290 and a second end portion 292. The construction of the embodiment is very similar to the embodiment shown in FIGS. 16-18 except that instead of a rod connecting the piston to the handle, there is a cable 294. One end 295 of the cable is attached to a lower end 296 of the cylindrical housing while the opposite end 297of the cable is attached to an anchor 298 in the handle. Between these two terminal points of the cable is a pulley 300 which is mounted to the piston. When an operator pulls on the handle to move the piston toward the first end portion, a low pressure chamber 302 is created and the biasing spring 287 is compressed. The advantage of the cable and pulley arrangement is that only about half of the force is required on the handle 288 to move the piston when compared to the embodiment of FIGS. 16-18.
[0034] As with the embodiment shown in FIGS. 16-18, the embodiment in FIGS. 19 and 20 includes an input conduit or tube 303, a first valve 304, a second valve 306 and a nozzle 308. Further, the embodiment of FIGS. 19 and 20 is operated by the identical actuator 310 as already described in relation to FIGS. 16-18.
[0035] Referring to FIG. 21, another embodiment of the wand is illustrated. This hand holdable pump spray 160 is configured with a pistol grip 162 and a trigger 164. A supply tube 166 engages the bottom of the grip. A handle 168 is designed to be visually integrated with the remainder of the wand to provide a more aesthetically pleasing unit. Referring now to FIG. 22, there is shown another embodiment of the wand. The illustrated wand 180 is similar to the wand of the FIG. 16 embodiment except that the FIG. 21 variation has a pistol grip 182. Still another embodiment is shown in FIG. 23 which is similar to the FIG. 1 embodiment except that the wand 190 is attached directly to the liquid container 192. The wand in all embodiments may be made of any suitable material such as polypropylene.
[0036] In operation of the FIGS. 1-15 embodiment, a user first removes the wand 14 from the sleeve 24 and unwraps the supply tube 12 from the bridge flange 40. The user then lifts the end 34 of the valve 28 to open the valve sealing the container. In the alternative structure the user lifts the valve element 31 to open the valve (see FIGS. 4-5) and plugs in the connector 35. Either of these actions communicates the valve with the internal tube 36, and thereby, the liquid 38 in the container 10.
[0037] To pressurize the system, the user holds the spray apparatus housing 44 in one hand and pulls the handle outward or to the left when viewed in FIGS. 6, 7 and 9. Liquid is drawn into the main chamber 80, while at the same time the coil spring 62 is compressed. When the main chamber 80 is filled, such as when the coil spring is fully compressed, the user or operator may release the handle 54 and place his/her hand around the trigger sleeve 68 with his/her thumb on the thumb lever 70. When it is desired to actuate the system, the user pulls back on the trigger sleeve 68 causing the nozzle/valve stem combination to slide leftwardly and unseat the valve face 98 from the valve seat 124. When this is done, liquid will flow around the valve stem in the annular space 91, through the radial passage 92, through the longitudinal opening 90, out of the radial passage 94, and into the nozzle chamber 114. From there the liquid will be ejected through the nozzle opening 112. The nozzle spray may be adjusted by rotating the nozzle relative to the valve stem so as to change the relative location of the valve stem nose 93 to the nozzle opening 112. The liquid will be sprayed out of the nozzle opening 112 as long as the coil spring 62 biases the piston 50 to the right, causing the main chamber 80 to contract. When the coil spring 62 has reached its relaxed position, or if the piston is stopped such as by the shaft flange, the piston will no longer provide pressure on the liquid and the user will have to repressurize the wand by again moving the handle 54 to the left thereby compressing the spring 62 again, and enlarging and filling the main chamber 80. This may be done repeatedly until most of the liquid 38 has been drawn out of the container 10. At that time or before, the valve 28 or the valve element 31 may be rotated to a horizontal position to seal the container. The supply tube 12 and the wand may be removed and the container and residual liquid may be discarded. The supply tube and wand may then be reused by connecting the supply tube to a new, fully filled container.
[0038] Should the spraying operation be finished before the spring 62 has reached its relaxed position, the button 145 of the fluid return mechanism may be depressed. This causes the plunger 141 to open the check valve 84, allowing the liquid in the main chamber 80 to pass into the small chamber 82 and from there, into the supply tube 12 and back to the container. In this manner the wand is depressurized and the liquid in the wand and supply tube is once again stored in the container. Once the liquid has returned to the container the pivot valve member may be rotated to a horizontal position to seal the container. Also the supply tube may be wrapped about the bridge flange and the wand may be inserted into the storage sleeve 24.
[0039] In operation of the embodiments shown in FIGS. 16-23, loading of the hand held pump spray apparatus is occasioned by the extension of the handle whereby the piston in the cylindrical housing is moved from the second end portion to the first end portion. This creates the lower pressure formed chamber and causes the liquid in the reservoir or container to be sucked through the intake tube, into the manifold and then into the formed chamber. After the chamber is filled, the intake valve closes because of the reverse pressure differential caused by the biasing spring acting on the piston which in turn acts on the liquid to be sprayed. The liquid to be sprayed is now contained between the intake and outlet valves. When the user depresses the operating button, the outlet valve opens and the liquid in the manifold and the chamber is expelled from the hand holdable pump spray apparatus until the button is released. When this occurs, the outlet valve is closed and no further liquid is sprayed. Operating the button causes the pump spray apparatus to dispense liquid until the manifold and the chamber are evacuated at which time the user will have to recharge the apparatus by extending the handle once again.
[0040] The specification describes in detail several embodiments of the present invention. Other modifications and variations will, under the doctrine of equivalents, come within the scope of the appended claims. For example, different actuator mechanisms, valve set-ups and nozzles are considered equivalent structures as are different aesthetic designs of the casing. Also, different handles, rods, pulleys, cylinders and pistons are also equivalent structures. Still other alternatives will also be equivalent as will many new technologies. There is no desire or intention here to limit in any way the application of the doctrine of equivalents.
a housing (44; 204; 284) having first (46; 206; 290) and second (48; 208; 292) end portions, said housing being spaced from a reservoir (10; 226; 192) of fluid to be sprayed;
a piston (50; 210; 286) being movable in said housing between said first and said second end portions;
a first chamber (80; 220; 302) in said housing between said piston and said second end portion, said first chamber being formed and/or enlarged when said piston is moved toward said first end portion, said first chamber being in operative communication with the spaced apart reservoir of fluid to be sprayed;
a handle (54; 212; 288; 168) connected to said piston adapted to be operated by a user of said hand holdable pump spray apparatus to move said piston toward said first end portion of said housing;
a first spring (62; 216; 287) operably connected to said piston to bias said piston toward said second end portion of said housing, to provide a biasing force against fluid in said first chamber;
a first valve (84; 222; 304) positioned between the fluid reservoir and said first chamber, said first valve being open when said handle is operated to move said piston toward said first end portion of said housing;
a nozzle (66; 242; 308) operatively connected to said housing and positioned to receive fluid from said first chamber;
a second valve ([88, 96, 98, 100, 102, 104 and 124]; 244; 306) separating said first chamber from said nozzle; and
an actuator ([68 and 70]; 254; 310) operatively connected to said second valve for opening said second valve to pass fluid from said first chamber to said nozzle.
an outer casing (202; 282), said casing enclosing said housing, said piston, said first spring, said first valve and said second valve.
a supply conduit (224, 303) located within said outer casing and being connected to said first valve.
said second valve includes a movable element (246), an opening (250) and a second spring (248), said second spring for biasing said movable element to close said opening.
a second chamber (240) located between said first and said second valves.
said actuator includes an operating button (255), a pivot shaft (256) connected to said operating button and an arm (258) for engaging said second valve.
said second valve includes a movable element, an opening and a second spring, said second spring for biasing said movable element to close said opening; and
said arm of said actuator engages said movable element of said second valve for moving said movable element against the bias of said second spring.
an outer casing, said casing enclosing said housing, said piston, said first spring, said first valve and said second valve.
a supply conduit located within said outer casing and being connected to said first valve.
a second chamber located between said first and said second valves.
a second chamber (82) in connection with said housing operatively connected to said reservoir;
said first valve separating said second chamber from said first chamber;
a second spring (126) to engage and bias said nozzle; and
said actuator including a hand operated trigger (68 and 70) connected to said nozzle to move said nozzle and said second valve whereby fluid in said first chamber may be ejected through said nozzle.
said second valve includes a valve stem (88) engaged to said nozzle;
said trigger causes a spray of fluid by moving said nozzle and said valve stem toward said first end portion of said housing whereby said second spring is compressed to provide a force to return said valve stem and said nozzle to a closed position; and
said housing includes a first sleeve portion (120) in which is mounted said valve stem.
said housing includes a second sleeve portion (146) to mount a plunger (141) for opening said first valve.
a plunger mounted in said second sleeve to engage and open said first valve to allow fluid located in said first chamber to flow into said second chamber and back to said reservoir.
a third spring (144) biasing said plunger away from engagement with said first valve.
a third chamber located between said second valve and said nozzle; and
a third spring biasing said plunger away from engagement with said first valve.
said trigger is a generally tubular shaped element mounted about said housing.
an end cap (64) connected to said first end portion of said housing, said end cap having a flange (140) and wherein:
said handle includes a flange (142) for engaging said flange of said end cap to restrain said handle from moving said piston.
said second valve has a central opening (90) operatively communicating with an opening (112) in said nozzle.
a third chamber (114) located between said second valve and said nozzle; and wherein
said handle extends beyond the first end portion of said housing;
said second chamber is formed in said second end portion of said housing; and
said first valve is located in said second end portion of said housing.
a container (10; 192) including said reservoir;
a second chamber (82) in communication with said second end portion of said housing operably connected to said reservoir;
said first valve separating said second chamber from said first chamber;
a second spring (126) to engage said nozzle; and
said actuator including a trigger (68 and 70) connected to said nozzle to move said nozzle and said second valve whereby fluid in said first chamber may be ejected through said nozzle.
a supply tube (12) connecting said container to said second chamber; and
a storage sleeve (24) connected to said container to store said housing.
said second valve includes a valve stem (88) engaged to said nozzle;
said trigger moves said nozzle and valve stem toward said first end portion of said housing when said trigger is activated whereby said second spring is compressed to provide a force on said valve stem and nozzle; and
said housing including a sleeve (120) in which is mounted said valve stem.
a supply tube connected to said container and to said second chamber; and
a safety valve (28) connected to said container and said supply tube.
a plunger (141) for engaging and opening said first valve to allow fluid in said first chamber to flow into said second chamber and back to said container.
a third spring (144) biasing said plunger away from said engagement with said first valve.
an end cap (64) connected to said first end portion of said housing, said end cap having a flange (140); and wherein:
said handle includes a flange (142) to engage said flange of said end cap to restrain said handle.
a third chamber (114) located between said second valve and said nozzle.
a container (10) including said reservoir;
a supply tube (12) being removably connectable to said container;
said housing having a first sleeve (120) and a second sleeve (146), said second sleeve being connected to said supply tube;
a second chamber (82) formed in said second sleeve;
said first valve located in said housing separating said first chamber from said second chamber;
said second valve located in said first sLeeve of said housing; and
a plunger (141) engageable with said first valve.
a second spring (126) in contact with said second valve to bias said second valve to a closed position; and
a third spring (144) to bias said plunger away from said first valve.
said second spring is mounted about said first sleeve.
said second valve includes a valve stem (88); and including
an O-ring (98) mounted about said valve stem; and
a valve seat (124) formed by a portion of said first sleeve.
ein Gehäuse (44; 204; 284) mit einem ersten (46; 206; 290) und einem zweiten (48; 208; 292) Endabschnitt, wobei das Gehäuse von einem Reservoir (10; 226; 192) mit zu versprühendem Fluid mit Abstand angeordnet ist;
einen Kolben (50; 210; 286), der im Gehäuse zwischen dem ersten und dem zweiten Endabschnitt bewegbar ist;
eine erste Kammer (80; 220; 302) im Gehäuse zwischen dem Kolben und dem zweiten Endabschnitt, wobei die erste Kammer gebildet und/oder vergrößert wird, wenn der Kolben zum ersten Endabschnitt hin bewegt wird, wobei die erste Kammer in betrieblicher Verbindung mit dem mit Abstand angeordneten Reservoir mit zu versprühendem Fluid steht;
einen mit dem Kolben verbundenen Griff (54; 212; 288; 168), der angepasst ist, um durch einen Benutzer des handhaltbaren Pumpsprühgerätes betrieben zu werden, um den Kolben zum ersten Endabschnitt des Gehäuses hin zu bewegen ;
eine erste Feder (62; 216; 287), die betrieblich mit dem Kolben verbunden ist, um den Kolben zum zweiten Endabschnitt des Gehäuses hin vorzuspannen, um eine Vorspannkraft gegen Fluid in der ersten Kammer bereitzustellen;
ein erstes Ventil (84; 222; 304), das zwischen dem Fluidreservoir und der ersten Kammer angeordnet ist, wobei das erste Ventil offen ist, wenn der Griff betrieben wird, um den Kolben zum ersten Endabschnitt des Gehäuses hin zu bewegen;
eine Düse (66; 242; 308), die betrieblich mit dem Gehäuse verbunden und angeordnet ist, um Fluid aus der ersten Kammer aufzunehmen;
ein zweites Ventil ([88, 96, 98, 100, 102, 104 und 124]; 244; 306), das die erste Kammer von der Düse trennt; und
ein Betätigungselement ([68 und 70]; 254; 310), das betrieblich mit dem zweiten Ventil verbunden ist, zum Öffnen des zweiten Ventils, um Fluid aus der ersten Kammer zur Düse hindurch zu lassen.
einen äußeren Mantel (202, 282), wobei der Mantel das Gehäuse, den Kolben, die erste Feder, das erste Ventil und das zweite Ventil umschließt.
einen Zuführschlauch (224, 303), der im äußeren Mantel angeordnet und mit dem ersten Ventil verbunden ist.
das zweite Ventil ein bewegliches Element (246), eine Öffnung (250) und eine zweite Feder (248) einschließt, wobei die zweite Feder zum Vorspannen des beweglichen Elementes dient, um die Öffnung zu verschließen.
eine zweite Kammer (240), die zwischen dem ersten und dem zweiten Ventil angeordnet ist.
das Betätigungselement einen Betriebsknopf (255), einen Gelenkbolzen (256), der mit dem Betriebsknopf verbunden ist, und einen Arm (258) zum Eingriff mit dem zweiten Ventil einschließt.
das zweite Ventil ein bewegliches Element, eine Öffnung und eine zweite Feder einschließt, wobei die zweite Feder zum Vorspannen des beweglichen Elementes dient, um die Öffnung zu verschließen; und
der Arm des Betätigungselements in Eingriff steht mit dem beweglichen Element des zweiten Ventils, um das bewegliche Element gegen die Vorspannung der zweiten Feder zu bewegen.
einen äußeren Mantel, wobei der Mantel das Gehäuse, den Kolben, die erste Feder, das erste Ventil und das zweite Ventil umschließt.
einen Zuführschlauch, der im äußeren Mantel angeordnet und mit dem ersten Ventil verbunden ist.
eine zweite Kammer, die zwischen dem ersten und dem zweiten Ventil angeordnet ist.
eine zweite Kammer (82) in Verbindung mit dem Gehäuse, die betrieblich mit dem Reservoir verbunden ist;
wobei das erste Ventil die zweite Kammer von der ersten Kammer trennt;
eine zweite Feder (126), um mit der Düse in Eingriff zu kommen und diese vorzuspannen; und
wobei das Betätigungselement einen handbetriebenen Auslöser (68 und 70) einschließt, der mit der Düse verbunden ist, um die Düse und das zweite Ventil zu bewegen, wodurch Fluid in der ersten Kammer durch die Düse ausgestoßen werden kann.
das zweite Ventil eine Ventilstange (88) einschließt, die mit der Düse in Eingriff steht;
der Auslöser einen Fluidsprühnebel erzeugt, indem er die Düse und die Ventilstange zum ersten Endabschnitt des Gehäuses hin bewegt, wodurch die zweite Feder zusammengedrückt wird, um eine Kraft bereitzustellen, um die Ventilstange und die Düse in eine geschlossenen Position zurück zu bringen; und
das Gehäuse einen ersten Hülsenabschnitt (120) einschließt, in dem die Ventilstange aufgenommen ist.
das Gehäuse einen zweiten Hülsenabschnitt (146) einschließt, um einen Ventilkolben (141) zur Öffnung des ersten Ventils aufzunehmen.
einen Ventilkolben, der in der zweiten Hülse aufgenommen ist, um mit dem ersten Ventil in Eingriff zu kommen und dieses zu öffnen, um zu ermöglichen, daß Fluid, das sich in der ersten Kammer befindet, in die zweite Kammer hinein und zurück zum Reservoir strömt.
eine dritte Feder (144), die den Ventilkolben vom Eingriff mit dem ersten Ventil weg vorspannt.
eine dritte Kammer, die zwischen dem zweiten Ventil und der Düse angeordnet ist; und
eine dritte Feder, die den Ventilkolben vom Eingriff mit dem ersten Ventil weg vorspannt.
der Auslöser ein im allgemeinen röhrenförmiges Element ist, das um das Gehäuse herum angebracht ist.
eine Endkappe (64), die mit dem ersten Endabschnitt des Gehäuses verbunden ist, wobei die Endkappe einen Flansch (140) aufweist, und wobei:
der Griff einen Flansch (142) zum Eingriff mit dem Flansch der Endkappe einschließt, um den Griff vom Bewegen des Kolbens zurückzuhalten.
das zweite Ventil eine zentrale Öffnung (90) aufweist, die betrieblich mit einer Öffnung (112) in der Düse verbunden ist.
eine dritte Kammer (114), die zwischen dem zweiten Ventil und der Düse angeordnet ist; und wobei
der Griff sich über den ersten Endabschnitt des Gehäuses hinaus erstreckt;
die zweite Kammer im zweiten Endabschnitt des Gehäuses ausgebildet ist; und
das erste Ventil im zweiten Endabschnitt des Gehäuses angeordnet ist.
einen Behälter (10; 192), der das Reservoir einschließt;
eine zweite Kammer (82) in Verbindung mit dem zweiten Endabschnitt des Gehäuses, die betrieblich verbunden ist mit dem Reservoir;
wobei das erste Ventil die zweite Kammer von der ersten Kammer trennt;
eine zweite Feder (126), um mit der Düse in Eingriff zu kommen; und
wobei das Betätigungselement einen Auslöser (68 und 70) einschließt, der mit der Düse verbunden ist, um die Düse und das zweite Ventil zu bewegen, wodurch Fluid in der ersten Kammer durch die Düse ausgestoßen werden kann.
einen Zuführschlauch (12), der den Behälter mit der zweiten Kammer verbindet; und
eine Aufnahmehülse (24), die mit dem Behälter verbunden, um das Gehäuse aufzunehmen.
das zweite Ventil eine Ventilstange (88) einschließt, die mit der Düse in Eingriff steht;
der Auslöser die Düse und die Ventilstange zum ersten Endabschnitt des Gehäuses hin bewegt, wenn der Auslöser aktiviert wird, wodurch die zweite Feder zusammengedrückt wird, um eine Kraft auf die Ventilstange und die Düse bereitzustellen; und
wobei das Gehäuse eine Hülse (120) einschließt, in der die Ventilstange aufgenommen ist.
einen Zuführschlauch, der mit dem Behälter und der zweiten Kammer verbunden ist; und
ein Sicherheitsventil (28), das mit dem Behälter und dem Zuführschlauch verbunden ist.
einen Ventilkolben (141) zum Ineingriffkommen mit dem ersten Ventil und öffnen desselben, um zu ermöglichen, daß Fluid in der ersten Kammer in die zweite Kammer hinein und zurück zum Behälter strömt.
eine dritte Feder (144), die den Ventilkolben vom Eingriff mit dem ersten Ventil weg vorspannt.
eine Endkappe (64), die mit dem ersten Endabschnitt des Gehäuses verbunden ist, wobei die Endkappe einen Flansch (140) aufweist; und wobei:
der Griff einen Flansch (142) einschließt, um mit dem Flansch der Endkappe in Eingriff zu kommen, um den Griff zurückzuhalten.
eine dritte Kammer (114), die zwischen dem zweiten Ventil und der Düse angeordnet ist.
einen Behälter (10), der das Reservoir einschließt;
einen Zuführschlauch (12), der lösbar mit dem Behälter verbindbar ist;
wobei das Gehäuse eine erste Hülse (120) und eine zweite Hülse (146) aufweist, wobei die zweite Hülse mit dem Zuführschlauch verbunden ist;
eine zweite Kammer (82), die in der zweiten Hülse ausgebildet ist;
wobei das erste Ventil, das im Gehäuse angeordnet ist, die erste Kammer von der zweiten Kammer trennt;
wobei das zweite Ventil in der ersten Hülse des Gehäuses angeordnet ist; und
einen Ventilkolben (141), der mit dem ersten Ventil in Eingriff bringbar ist.
eine zweite Feder (126) in Kontakt mit dem zweiten Ventil, um das zweite Ventil in eine geschlossene Position vorzuspannen; und
eine dritte Feder (144), um den Kolben vom ersten Ventil weg vorzuspannen.
die zweite Feder um die erste Hülse herum angebracht ist.
das zweite Ventil eine Ventilstange (88) einschließt; und einschließlich eines O-Rings (98), der um die Ventilstange herum angebracht ist; und eines Ventilsitzes (124), der von einem Abschnitt der ersten Hülse gebildet ist.
un boîtier (44 ; 204 ; 284) doté d'une première (46 ; 206 ; 290) et d'une deuxième (48 ; 208 ; 292) parties d'extrémité, ledit boîtier étant espacé d'un réservoir (10 ; 226 ; 192) de fluide à pulvériser ;
un piston (50 ; 210 ; 286) étant déplaçable dans ledit boîtier entre ladite première et ladite deuxième parties d'extrémité ;
une première chambre (80 ; 220 ; 302) dans ledit boîtier entre ledit piston et ladite deuxième partie d'extrémité, ladite première chambre étant formée et/ou agrandie lorsque ledit piston est déplacé vers ladite première partie d'extrémité, ladite première chambre étant en communication fonctionnelle avec le réservoir espacé de fluide à pulvériser ;
une poignée (54 ; 212 ; 288 ; 168) connectée audit piston conçue pour être actionnée par un utilisateur dudit appareil portatif de pulvérisation à pompe pour déplacer ledit piston vers ladite première partie d'extrémité dudit boîtier ;
un premier ressort (62 ; 216 ; 287) connecté de manière fonctionnelle audit piston pour solliciter ledit piston vers ladite deuxième partie d'extrémité dudit boîtier, pour fournir une force de sollicitation contre un fluide dans ladite première chambre ;
une première soupape (84 ; 222 ; 304) positionnée entre le réservoir de fluide et ladite première chambre, ladite première soupape étant ouverte lorsque ladite poignée est actionnée pour déplacer ledit piston vers ladite première partie d'extrémité dudit boîtier ;
une buse (66 ; 242 ; 308) connectée de manière fonctionnelle audit boîtier et positionnée pour recevoir un fluide depuis ladite première chambre ;
une deuxième soupape ([88, 96, 98, 100, 102, 104 et 124]; 244; 306) séparant ladite première chambre de ladite buse ; et
un actionneur ([68 et 70] ; 254 ; 310) connecté de manière fonctionnelle à ladite deuxième soupape pour ouvrir ladite deuxième soupape pour faire passer un fluide de ladite première chambre à ladite buse.
un logement extérieur (202 ; 282), ledit logement contenant ledit boîtier, ledit piston, ledit premier ressort, ladite première soupape et ladite deuxième soupape.
un conduit (224, 303) d'alimentation situé à l'intérieur dudit logement extérieur et étant connecté à ladite première soupape.
ladite deuxième soupape comprend un élément déplaçable (246), une ouverture (250) et un deuxième ressort (248), ledit deuxième ressort servant à solliciter ledit élément déplaçable pour fermer ladite ouverture.
une deuxième chambre (240) située entre ladite première et ladite deuxième soupapes.
ledit actionneur comprend un bouton (255) d'actionnement, une tige (256) d'articulation connectée audit bouton d'actionnement et un bras (258) pour s'engager dans ladite soupape.
ladite deuxième soupape comprend un élément déplaçable, une ouverture et un deuxième ressort, ledit deuxième ressort servant à solliciter ledit élément déplaçable pour fermer ladite ouverture ; et
ledit bras dudit actionneur s'engage dans ledit élément déplaçable de ladite deuxième soupape pour déplacer ledit élément déplaçable contre la sollicitation dudit deuxième ressort.
un logement extérieur, ledit logement contenant ledit boîtier, ledit piston, ledit premier ressort, ladite première soupape et ladite deuxième soupape.
un conduit d'alimentation situé à l'intérieur dudit logement extérieur et étant connecté à ladite première soupape.
une deuxième chambre située entre ladite première et ladite deuxième soupapes.
une deuxième chambre (82) en connexion avec ledit boîtier connectée de manière fonctionnelle audit réservoir ;
ladite première soupape séparant ladite deuxième chambre de ladite première chambre ;
un deuxième ressort (126) pour s'engager dans et solliciter ladite buse ; et
ledit actionneur comprenant un déclencheur (68 et 70) à commande manuelle connecté à ladite buse pour déplacer ladite buse et ladite deuxième soupape par lequel un fluide dans ladite première chambre peut être éjecté à travers ladite buse.
ladite deuxième soupape comprend une tige (88) de soupape engagée dans ladite buse ;
ledit déclencheur provoque une pulvérisation de fluide en déplaçant ladite buse et ladite tige de soupape vers ladite première partie d'extrémité dudit boîtier par lequel ledit deuxième ressort est comprimé pour fournir une force pour renvoyer ladite tige de soupape et ladite buse dans une position fermée ; et
ledit boîtier comprend une première partie (120) de manchon dans laquelle est montée ladite tige de soupape.
ledit boîtier comprend une deuxième partie (146) de manchon pour monter un plongeur (141) pour ouvrir ladite première soupape.
un plongeur monté dans ledit deuxième manchon pour s'engager dans et ouvrir ladite première soupape pour permettre à un fluide situé dans ladite première chambre de s'écouler dans ladite deuxième chambre et de retourner audit réservoir.
un troisième ressort (144) sollicitant ledit plongeur pour l'empêcher de s'engager dans ladite première soupape.
une troisième chambre située entre ladite deuxième soupape et ladite buse ; et
un troisième ressort sollicitant ledit plongeur pour l'empêcher de s'engager dans ladite première soupape.
ledit déclencheur est un élément de forme généralement tubulaire monté autour dudit boîtier.
un embout (64) connecté à ladite première partie d'extrémité dudit boîtier, ledit embout étant doté d'une bride (140) et dans lequel :
ladite poignée comprend une bride (142) pour s'engager dans ladite bride dudit embout pour empêcher ladite poignée de déplacer ledit piston.
ladite deuxième soupape a une ouverture centrale (90) communiquant de manière fonctionnelle avec une ouverture (112) dans ladite buse.
une troisième chambre (114) située entre ladite deuxième soupape et ladite buse ; et dans lequel
ladite poignée s'étend au-delà de la première partie d'extrémité dudit boîtier ;
ladite deuxième chambre est formée dans ladite deuxième partie d'extrémité dudit boîtier ; et
ladite première soupape est située dans ladite deuxième partie d'extrémité dudit boîtier.
un récipient (10 ; 192) comprenant ledit réservoir ;
une deuxième chambre (82) en communication avec ladite deuxième partie d'extrémité dudit boîtier connectée de manière fonctionnelle audit réservoir ;
ladite première soupape séparant ladite deuxième chambre de ladite première chambre ;
un deuxième ressort (126) pour s'engager dans ladite buse ; et
ledit actionneur comprenant un déclencheur (68 et 70) connecté à ladite buse pour déplacer ladite buse et ladite deuxième soupape par lequel un fluide dans ladite première chambre peut être éjecté à travers ladite buse.
un tube (12) d'alimentation connectant ledit récipient à ladite deuxième chambre ; et
un manchon (24) de stockage connecté audit récipient pour stocker ledit boîtier.
ladite deuxième soupape comprend une tige (88) de soupape engagée dans ladite buse ;
ledit déclencheur déplace ladite buse et ladite tige de soupape vers ladite première partie d'extrémité dudit boîtier lorsque ledit déclencheur est actionné par lequel ledit deuxième ressort est comprimé pour fournir une force sur ladite tige de soupape et sur ladite buse ; et
ledit boîtier comprenant un manchon (120) dans lequel est montée ladite tige de soupape.
un tube d'alimentation connecté audit récipient et à ladite deuxième chambre ; et
une soupape (28) de sécurité connectée audit récipient et audit tube d'alimentation.
un plongeur (141) pour s'engager dans et ouvrir ladite première soupape pour permettre à un fluide dans ladite première chambre de s'écouler dans ladite deuxième chambre et de revenir audit récipient.
un troisième ressort (144) sollicitant ledit plongeur pour empêcher ledit engagement dans ladite première soupape.
un embout (64) connecté à ladite première partie d'extrémité dudit boîtier, ledit embout étant doté d'une bride (140) ; et dans lequel :
ladite poignée comprend une bride (142) pour s'engager dans ladite bride dudit embout pour retenir ladite poignée.
une troisième chambre (114) située entre ladite deuxième soupape et ladite buse.
un récipient (10) comprenant ledit réservoir ;
un tube (12) d'alimentation pouvant être connecté de manière déplaçable audit récipient ;
ledit boîtier ayant un premier manchon (120) et un deuxième manchon (146), ledit deuxième manchon étant connecté audit tube d'alimentation ;
une deuxième chambre (82) formée dans ledit deuxième manchon ;
ladite première soupape située dans ledit boîtier séparant ladite première chambre de ladite deuxième chambre ;
ladite deuxième soupape située dans ledit premier manchon dudit boîtier ; et
un plongeur (141) pouvant s'engager dans ladite première soupape.
un deuxième ressort (126) en contact avec ladite deuxième soupape pour solliciter ladite deuxième soupape vers une position fermée ; et
un troisième ressort (144) pour solliciter ledit plongeur en l'éloignant de ladite première soupape.
ledit deuxième ressort est monté autour dudit premier manchon.
ladite deuxième soupape comprend une tige (88) de soupape ; et comprenant
un joint torique (98) monté autour de ladite tige de soupape ; et
un siège (124) de soupape formé par une partie dudit premier manchon.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
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