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EP 2 025 635 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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04.11.2015 Bulletin 2015/45 |
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Date of filing: 14.08.2008 |
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International Patent Classification (IPC):
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Movement apparatus
Bewegungsvorrichtung
Appareil de mouvement
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Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL
PT RO SE SI SK TR |
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Priority: |
16.08.2007 GB 0715921
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Date of publication of application: |
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18.02.2009 Bulletin 2009/08 |
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Proprietor: Adams, William Mark |
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Retford,
Nottinghamshire DN22 8PT (GB) |
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Inventor: |
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- Adams, William Mark
Retford,
Nottinghamshire DN22 8PT (GB)
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Representative: Wood, Graham |
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Bailey Walsh & Co LLP
1 York Place Leeds, LS1 2DR Leeds, LS1 2DR (GB) |
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References cited: :
GB-A- 1 082 925 US-A- 1 136 678 US-A- 5 351 787 US-B1- 6 182 798
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GB-A- 1 500 271 US-A- 4 063 619 US-A1- 2006 249 334 US-B1- 7 143 869
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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).
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[0001] The invention to which this application relates is apparatus which can be used to
move goods and articles carried on a platform between first and second positions along
a substantially vertical axis.
[0002] The use of lifting apparatus for use in the movement of goods, is well known and
the applicant has a number of granted patents and pending applications, which relate
to this form of apparatus. The apparatus is found to be of particular use to allow
the loading and unloading of goods to and from goods storage areas, which, in one
example, may be in the form of a vehicle trailer, or a warehouse of, for example,
a retail outlet. One use of the apparatus is at a distribution hub at which goods
can be collected from vehicle deliveries and then allocated for subsequent delivery
to specific retail outlets by loading the goods into specific vehicle trailers.
[0003] There is typically a problem in moving goods between goods storage areas of this
type efficiently and successfully to and from the rear of the vehicle trailer, and
into and from the opening of the warehouse using lifting apparatus as the apparatus
can be difficult and expensive to install and typically will have a relatively limited
range of movement.
[0004] The applicant has identified this problem and has developed a modular system which
can be prefabricated under factory conditions, and then moved into position adjacent
to a loading dock or opening into the warehouse and to which a vehicle trailer may
be moved. The platform of the apparatus then allows goods to be moved from the goods
storage area, onto the platform and the platform can then be moved to bring the same
to a required height to allow the goods to then be moved into the trailer and vice
versa. This is especially useful in the loading of goods onto a trailer with two floors,
one spaced above the other. The movable platform allows the floors to be provided
at fixed heights in the trailer, as the movement of the goods between heights is achieved
by the movable platform on the apparatus. This avoids the need for movable floors
to be provided in the trailer and therefore avoids the problems which are experienced
with the provision of movable floors in the trailers themselves which are prone to
failure and make the trailers expensive.
[0005] It has been found that this modular apparatus is particularly affective in that it
allows the movement of the goods to be achieved without the need for significant infra-structure
to be deployed and also, it is found that the range of movement of the platform is
significantly greater than that in other previous systems.
[0006] A further problem which is experienced with apparatus of this type, whether it is
movable across a surface or provided in a fixed position is that there is a need for
the frame of the apparatus to be as thin as possible in order for the platform to
be lowered to a sufficient extent so as to allow goods to be moved onto and from the
floor and the platform. Conventionally this means that, when scissor lifts are used,
the minimum height of 150mm which is required to allow the scissor mechanism to operate
is problematic and one typical solution is to countersink the apparatus below the
floor surface. However this adds significant exposure in terms of excavation work
required and makes the apparatus difficult to access for maintenance and repair.
[0007] Document
GB1082925 discloses apparatus for use as a tail lift for vehicle in which there is provided
a platform which is connected to slides which are connected to lifting cables provided
in uprights and which are connected to a hydraulic ram. The slides are vertically
movable along the uprights and allow movement to be exerted on one of the sides of
the platform. The platform is also pivotably moveable between vertical and horizontal
planes. Document
US7143869 discloses a vehicle lift in which there is provided a platform on which the vehicle
is supported. A hydraulic ram is mounted on the platform and cables connect the ram
to the top of a number of movement guides along which the platform is vertically movable.
US531787 discloses a platform mounted on a single guide for vertical movement and a ram is
located alongside the same.
US2006/0249334 discloses a buffer system for use with an elevator.
[0008] An aim of the present invention is to provide a lifting apparatus which has movement
means for a platform provided in a manner which is unobtrusive while at the same time
ensuring that the movement is uniform, efficient and reliable.
[0009] In a first aspect of the invention, there is provided movement apparatus, said apparatus
comprising a frame having at least four spaced guides, said guides provided to guide
movement of a platform along a substantially vertical axis, said guide means including
movement means in the form of a plurality of flexible elongate members which cause
the platform to be moved, at least one of the said elongate members being of different
length and the elongate members are each connected to a common hydraulic ram, the
movement of which causes movement of the said elongate members, and hence platform,
along the guide means, said hydraulic ram mounted on the frame and the guide means
are provided to act on at least two opposing sides of the platform and characterised
in that an end of each of the elongate members is connected to the platform and at
least one safety means is provided to act on and support the platform by reacting
to failure of the movement means and prevent the platform from moving in an uncontrolled
downward direction.
[0010] In one embodiment each member passes round a pulley, said pulley mounted at the top
of a respective guide means.
[0011] Typically each of the elongate members is of a different length, said lengths selected
to ensure that when the elongate members are connected to the platform and the ram
via their respective ends, the platform is held in a substantially horizontal plane
at all positions along the guide means. Thus, the lengths of each of the elongate
members is selected so as to hold the platform in the horizontal plane and with respect
to the location of the particular guide means with which the particular elongate member
is located, and the location of the ram on the apparatus.
[0012] In one embodiment, the ram may be provided at the base of the frame and adjacent
one side edge thereof. In one embodiment the ram can be fitted at one edge of the
lift which is to be positioned adjacent one of the goods storage areas. For example
if the apparatus is used with a movable trailer then the ram may be fitted across
the edge of the apparatus which lies adjacent the trailer in use. However, it should
be appreciated that the particular location of the ram can be selected to suit particular
operating requirements.
[0013] In one embodiment, the elongate members are steel cables.
[0014] The at least one safety means is mounted to act on and support the platform upon
failure of the movement means. In one embodiment the safety means comprise one or
more safety rams mounted in a vertical plane, one end of the same following the movement
of the underside of the platform and the other end secured at a fixed location to
the apparatus. Typically the ram is provided with a burst valve such that upon a significant
increase in load on the ram from the platform the valve operates to lock the ram in
the position at that instant and hence prevent the platform from moving further downwardly.
Typically the safety rams are powered via a mains motor or a secondary unit running
in tandem with the mains motor.
[0015] In one emodiment a vertically mounted safety ram is provided in or adjacent to each
of the guide means.
[0016] Typically the sudden increase in load is caused by the failure of one or more of
the movement means and/or the ram connected thereto.
[0017] In an alternative embodiment, each of the guide means incorporates a clamp arrangement,
said clamp arrangement located with the platform but running along the said guide
means. Each of the cable clamps is provided such that upon failure of the ram or failure
of the elongate member connection between the platform and the ram, the clamp will
move so as to lock the platform at that particular location on the guide means and
therefore prevent the platform from falling along the guide means in an uncontrolled
manner.
[0018] This provides important safety for users of the apparatus.
[0019] In one embodiment, when the platform is required to be used at a specific location
height, such as for example, at the height of a loading dock, locking devices or the
clamps mentioned above may be utilised to hold the platform fixed in that position
until the position of the platform is required to be moved. This ensures that any
elasticity in the elongate members can be taken into account and ensures that the
platform is held at the required height.
[0020] As the length of the elongate members is important, each of the elongate members
is preferably pre-stressed, prior to utilisation in the apparatus.
[0021] In one embodiment, the platform is provided with a bridging ramp which can be extended
from the platform to form a bridge between the platform and an adjacent surface, such
as the deck of a vehicle trailer or floor of a warehouse and thereby allow goods to
be transferred to and from the same via the bridge. In one embodiment, the bridge
is powered by hydraulic rams, which may be connected to the same power pack as provides
power for the single ram which drives the movement of the platform.
[0022] In another embodiment a levelling plate can be utilised to allow a ramp to be created
on the platform so as to allow connection between the different heights of floors
of different vehicles. This movement may be powered from the ram power source.
[0023] By providing the movement of the platform by using a single ram, then the expense
of the conventional multiple ram or scissor lift arrangements, and the difficulties
in obtaining synchronisation of the same, can be avoided. Furthermore, the use of
the arrangement as herein described, allows platforms of any practical size to be
developed and moved, which is in contrast to the platform sizes which may be moved
using the conventional scissor lift arrangement and which platform sizes are relatively
restricted. This arrangement allows the base of the apparatus to be shallow hence
requiring no excavation work. The width of the apparatus is also relatively slim.
[0024] Specific embodiments of the invention are now described with reference to the accompanying
drawings, wherein:-
Figure 1 illustrates a perspective view of apparatus in accordance with one embodiment
of the invention;
Figures 2 and 3 illustrate the side and front elevations of apparatus in accordance
with the embodiment of Figure 1; and
Figure 4 illustrates a plan view of apparatus in accordance with the invention.
[0025] Referring now to all of the figures, there is provided apparatus 2 including a movable
platform 4, which platform is movable along respective guide means 6, 8, 10, 12 provided
as part of frame 14. As well as acting to guide the movement of the platform, along
the vertical plane, the guide means also act as a route for elongate members, hereinafter
referred to as cables 20, one of which is shown in Figure 3 and in practise one cable
passes along each of the guide means 6, 8, 10, 12. The cable passes from a first end
24, in contact with the platform, up the guide means to a pulley 22 at the top of
the guide means and which pulley may be pivotally movable or angularly offset so as
to ensure that the cable is provided in the required position to allow vertical movement
of the platform. The cable then passes round the pulley and back down to connection
26 with a single hydraulic ram 28, which is mounted, in this embodiment, near the
base of the apparatus and at one edge 30 which in use will be that which has access
opening 32 to which the opening of a storage area in the form of a vehicle trailer
(not shown) is moved.
[0026] It will therefore be appreciated that the distance from the end of the ram, to connection
with the platform, for each of the cables, will be of a different length and therefore
it is important that the appropriate length of cable is used for each connection so
as to ensure that the platform suspended from the cables is maintained substantially
horizontally or at another desired angle by the cables, regardless of the particular
height of the platform at that time.
[0027] The provision of a single ram, is found to be efficient in that it allows the platform
to be moved efficiently between locations in a vertical plane and for the same to
be kept in a substantially horizontal plane.
[0028] Typically, the apparatus is provided in a fixed location during use. In one embodiment,
the fixed location is with access opening 34 adjacent to an opening into a goods storage
area in the form of a warehouse and at the opposing side of the apparatus, there is
provided access opening 32 to a vehicle trailer. Typically, said further side at which
access is provided is designed to receive the positioning of an opening of a further
goods storage area, such as a vehicle trailer, which can be moved into position.
[0029] In one embodiment, the hydraulic ram is used to operate each of the movement means
and the hydraulic ram itself is mounted to lie substantially flush with the side wall,
roof or base of the frame of the apparatus.
[0030] In one embodiment, the ram lies substantially flush with the frame, thereby allowing
the platform to be moved along substantially the entire length of each of the guide
means thereby providing a significant range of movement for the same.
[0031] If required, a ramp 36 can be provided at one or both openings 32, 34 so that, if
required, it can be extended to lie outside the frame 14 to bridge any gap between
the apparatus 2 and the storage area. One such ramp is shown extended from opening
34 in the Figures.
[0032] The apparatus preferably includes safety means, one example of which is shown in
Figure 2. The safety means are provided in the form of vertically mounted safety rams
38. Each of the rams, in this case are mounted adjacent a guide means 6,8,10,12. Each
ram has a first end 40 which is fixed to the frame 14 and an opposing end 42 which
is mounted to the underside of the platform 4 so as to follow the up and down movement
of the same. The rams may be capable of supporting some weight in their normal usage
but are not required to for the normal operation of the platform. Each ram is provided
with a burst valve which controls the supply of fluid to the rams.
[0033] Upon failure of the platform movement means, such as for example one of the flexible
members breaking, the platform would be free to lurch downwardly which could be dangerous
to goods thereon and more importantly to any personnel standing on the platform. However
if this occurs in the apparatus as herein described, the sudden increase of load which
this causes on the safety rams 38 is sufficient to cause the burst valve on the safety
rams to burst which in turn prevents the rams from moving from the position at which
they are at at that instant. This therefore means that the platform is then fully
supported on the safety rams and cannot move in an uncontrolled downward direction.
In turn this means that personnel and goods on the platform are maintained in a safe
position until they can be safely taken off the platform.
[0034] The present invention therefore provides a synchronised movement of the platform
in an effective manner by using a common movement means.
1. movement apparatus (2), said apparatus comprising a frame (14) having at least four
spaced guide means (6,8,10,12), said guide means provided to guide movement of a platform
(4) along a vertical axis, said guide means including movement means in the form of
a plurality of flexible elongate members (20) which cause the platform to be moved,
at least one of the said elongate members being of different length and the elongate
members are each connected to a common hydraulic ram (28), the movement of which causes
movement of the said elongate members, and hence platform, along the guide means,
said hydraulic ram (28) mounted on the frame (14) and the guide means (6,8,10,12)
are provided to act on at least two opposing sides of the platform (4) and characterised in that an end (24) of each of the elongate members (20) is connected to the platform (4)
and at least one safety means is provided to act on and support the platform by reacting
to failure of the movement means and prevent the platform from moving in an uncontrallcd
downward direction.
2. Apparatus according to claim 1 characterised in that each member passes round a pulley, said pulley mounted at the top of a respective
guide means.
3. Apparatus according to claim 1 characterised in that each of the elongate members is of a different length.
4. Apparatus according to claim 3 characterised in that the said lengths are selected to ensure that when the elongate member arc connected
to the platform and the ram via their respective ends, the platform is held in a substantially
horizontal plane at all positions along the guide means.
5. Apparatus according to claim 1 characterised in that the ram is provided at the base of the frame and adjacent one side edge thereof.
6. Apparatus according to claim 1 characterised in that the ram is fitted at the edge of the frame which is to be positioned adjacent one
of the goods storage areas.
7. Apparaus according to claim 1 characterised in that the elongate members are steel cables.
8. Apparatus according to claim 1 characterised in that the safety means comprise one or more safety rams mounted in a vertical plane, one
end of the same following the movement of the underside of the platform and the other
end secured at a fixed location to the apparatus.
9. Apparatus, according to claim 8 characterised in that each safety ram is provided with a burst valve such that upon a significant increase
in load on the ram from the platform the valve operates to lock the ram in the position
at that instant and hence prevent the platform from moving further downwardly.
10. Apparatus according to claim 8 characterised in that a safety ram is provided in or adjacent to each of the guide means.
11. Apparatus according to claim 1 characterised in that each of the guide means incorporates a clamp arrangement, said clamp arrangement
located with the platform and running along the said guide means such that upon failure
of the ram or failure of the elongate member connection between the platform and the
ram, the clamp moves to lock the platform at that particular location on the guide
means when failure occurs.
12. Apparatus according to claim 1 characterised in that the platform is provided with a bridging ramp which can be expended from rhe platform
to form a bridge between the platform and an adjacent surface.
13. Apparatus according to claim 1 characterised in that a levelling plate is utilised to allow a ramp to be created on the platform so as
to allow connection between the different heights of floors of different vehicles.
1. Bewegungsvorrichtung (2), wobei die genannte Vorrichtung einen Rahmen (14) aufweist,
der wenigstens vier voneinander beabstandete Führungsmittel (6, 8, 10, 12) hat, wobei
die genannten Führungsmittel zum Führen der Bewegung einer Plattform (4) an einer
vertikalen Achse entlang vorgesehen sind, wobei die genannten Führungsmittel Bewegungsmittel
in der Form von mehreren flexiblen länglichen Elementen (20) beinhalten, die verursachen,
dass die Plattform bewegt wird, wobei wenigstens eines der genannten länglichen Elemente
eine andere Länge hat und die länglichen Elemente jeweils mit einem gemeinsamen Hydraulikzylinder
(28) verbunden sind, dessen Bewegung die Bewegung der genannten länglichen Elemente
und somit der Plattform entlang der Führungsmittel verursacht, wobei der genannte
Hydraulikzylinder (28) an dem Rahmen (14) montiert ist und die Führungsmittel (6,
8, 10, 12) bereitgestellt sind, um auf wenigstens zwei entgegengesetzte Seiten der
Plattform (4) zu wirken, und dadurch gekennzeichnet, dass ein Ende (24) von jedem der länglichen Elemente (20) mit der Plattform (4) verbunden
ist, und wenigstens ein Sicherheitsmittel bereitgestellt ist, um (auf) die Plattform
zu wirken und unterstützen, indem es auf den Ausfall der Bewegungsmittel reagiert
und verhütet, dass die Plattform sich in einer unkontrollierten Abwärtsrichtung bewegt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jedes Element um eine Seilscheibe herumgeführt wird, wobei die genannte Seilscheibe
oben an einem jeweiligen Führungsmittel montiert ist.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jedes der länglichen Elemente eine andere Länge hat.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die genannten Längen ausgewählt sind, um sicherzustellen, dass, wenn die länglichen
Elemente über ihre jeweiligen Enden mit der Plattform und dem Zylinder verbunden sind,
die Plattform an allen Positionen entlang der Führungsmittel in einer im Wesentlichen
horizontalen Ebene gehalten wird.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Zylinder an der Basis des Rahmens und an einen Seitenrand davon angrenzend bereitgestellt
ist.
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Zylinder an dem Rand des Rahmens angebracht ist, der an einen der Warenlagerbereiche
angrenzend zu positionieren ist.
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die länglichen Elemente Stahlseile sind.
8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Sicherheitsmittel einen oder mehr Sicherheitszylinder aufweist, die in einer
vertikalen Ebene montiert sind, wobei ein Ende derselben der Bewegung der Unterseite
der Plattform folgt und das andere Ende an einer bleibenden Stelle an der Vorrichtung
befestigt ist.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass jeder Sicherheitszylinder mit einer Berstscheibe versehen ist, so dass die Scheibe
bei einer bedeutenden Zunahme der Belastung des Zylinders durch die Plattform betätigt
wird, um den Zylinder in diesem Augenblick auf der Position zu arretieren und so zu
verhüten, dass sich die Plattform weiter nach unten bewegt.
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass ein Sicherheitszylinder in oder neben jedem der Führungsmittel bereitgestellt ist.
11. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jedes der Führungsmittel eine Klemmenanordnung beinhaltet, wobei die genannte Klemmenanordnung
an der Plattform positioniert ist und an den genannten Führungsmitteln entlang läuft,
so dass die Klemme sich beim Ausfall des Zylinders oder beim Ausfall der Verbindung
der länglichen Elemente zwischen der Plattform und dem Zylinder bewegt, um die Plattform
auf dieser bestimmten Position an den Führungsmitteln zu arretieren, wenn ein Ausfall
stattfindet.
12. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Plattform mit einer Übergangsrampe versehen ist, die von der Plattform ausgestreckt
werden kann, um zwischen der Plattform und einer benachbarten Oberfläche eine Brücke
zu bilden.
13. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eine Höhenausgleichsplatte genutzt wird, damit an der Plattform eine Rampe gebildet
werden kann, um die Verbindung zwischen den verschiedenen Bodenhöhen verschiedener
Fahrzeuge zu ermöglichen.
1. Appareil de mouvement (2), ledit appareil comprenant une ossature (14) avec au moins
quatre moyens de guidage espacés (6, 8, 10, 12), lesdits moyens de guidage étant prévus
pour guider le mouvement d'une plate-forme (4) le long d'un axe vertical, lesdits
moyens de guidage incluant des moyens de mouvement sous la forme d'une pluralité d'éléments
allongés souples (20) lesquels provoquent le déplacement de la plate-forme, au moins
l'un desdits éléments allongés ayant une longueur différente, et chacun des éléments
allongés étant raccordé à un vérin hydraulique commun (28), dont le mouvement entraîne
le mouvement desdits éléments allongés, et par conséquent de la plate-forme, le long
des moyens de guidage, ledit vérin hydraulique (28) étant monté sur l'ossature (14)
et les moyens de guidage (6, 8, 10, 12) étant prévus pour agir sur au moins deux côtés
opposés de la plate-forme (4), et caractérisé en ce qu'une extrémité (24) de chacun des éléments allongés (20) est raccordée à la plate-forme
(4), et au moins un moyen de sécurité est prévu pour agir sur la plate-forme, et pour
soutenir cette dernière, du fait qu'il réagit à une défaillance des moyens de mouvement
et empêche la plate-forme de se déplacer suivant un sens incontrôlé vers le bas.
2. Appareil selon la revendication 1, caractérisé en ce que chaque élément passe autour d'une poulie, ladite poulie étant montée au niveau de
la partie supérieure d'un moyen de guidage respectif.
3. Appareil selon la revendication 1, caractérisé en ce que chacun des éléments allongés a une longueur différente.
4. Appareil selon la revendication 3, caractérisé en ce que lesdites longueurs sont sélectionnées de façon à s'assurer que, lorsque les éléments
allongés sont raccordés à la plate-forme et au vérin par l'intermédiaire de leurs
extrémités respectives, la plate-forme est maintenue dans un plan sensiblement horizontal
à toutes les positions le long des moyens de guidage.
5. Appareil selon la revendication 1, caractérisé en ce que le vérin est prévu au niveau de la base de l'ossature et en position adjacente à
un bord latéral de celle-ci.
6. Appareil selon la revendication 1, caractérisé en ce que le vérin est prévu au niveau du bord de l'ossature lequel est destiné à être positionné
de façon adjacente à l'une des zones de stockage de marchandises.
7. Appareil selon la revendication 1, caractérisé en ce que les éléments allongés sont des câbles en acier.
8. Appareil selon la revendication 1, caractérisé en ce que les moyens de sécurité comprennent un ou plusieurs vérins de sécurité lesquels sont
montés suivant un plan vertical, alors que l'une de leurs extrémités suit le mouvement
de la face inférieure de la plate-forme et que l'autre extrémité est assujettie à
l'appareil au niveau d'un emplacement fixe.
9. Appareil selon la revendication 8, caractérisé en ce que chaque vérin de sécurité est muni d'une soupape de rupture de telle sorte que, lors
d'un accroissement significatif de la charge sur le vérin en provenance de la plate-forme,
la soupape sera actionnée afin de bloquer le vérin sur la position occupée à ce moment-là,
et par conséquent va empêcher la plate-forme de se déplacer plus avant vers le bas.
10. Appareil selon la revendication 8, caractérisé en ce qu'un vérin de sécurité est prévu dans chacun des moyens de guidage, ou en position adjacente
à chacun des moyens de guidage.
11. Appareil selon la revendication 1, caractérisé en ce que chacun des moyens de guidage incorpore un agencement de serrage, ledit agencement
de serrage étant positionné avec la plate-forme et se déplaçant le long desdits moyens
de guidage de telle sorte que, lors d'une défaillance du vérin ou d'une défaillance
du raccordement de l'élément allongé entre la plate-forme et le vérin, le dispositif
de serrage va effectuer un mouvement afin de bloquer la plate-forme à cet emplacement
particulier sur les moyens de guidage au moment où la défaillance survient.
12. Appareil selon la revendication 1, caractérisé en ce que la plate-forme est munie d'une rampe de pontage qui peut être prolongée à partir
de la plate-forme pour former un pont entre la plate-forme et une surface adjacente.
13. Appareil selon la revendication 1, caractérisé en ce qu'une plaque de mise à niveau est utilisée pour permettre la création d'une rampe sur
la plate-forme de sorte à procurer un raccordement entre les différentes hauteurs
de plancher de différents véhicules.
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.
Patent documents cited in the description