WO2002007666A1 - Wheel chair swing arm lift - Google Patents

Wheel chair swing arm lift Download PDF

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Publication number
WO2002007666A1
WO2002007666A1 PCT/AU2000/000885 AU0000885W WO0207666A1 WO 2002007666 A1 WO2002007666 A1 WO 2002007666A1 AU 0000885 W AU0000885 W AU 0000885W WO 0207666 A1 WO0207666 A1 WO 0207666A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
tray
lifting
slides
slide
Prior art date
Application number
PCT/AU2000/000885
Other languages
French (fr)
Inventor
Robert Leonard George Page
Mark Laughton
Original Assignee
Workman Industries Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Workman Industries Pty Ltd filed Critical Workman Industries Pty Ltd
Priority to AU2000259547A priority Critical patent/AU2000259547A1/en
Priority to PCT/AU2000/000885 priority patent/WO2002007666A1/en
Publication of WO2002007666A1 publication Critical patent/WO2002007666A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/44—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element
    • B60P1/4414—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load
    • B60P1/4442—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element and keeping the loading platform parallel to the ground when raising the load the raising device, when not in use, being stored inside the load-transporting compartment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G3/00—Ambulance aspects of vehicles; Vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances, e.g. for facilitating access of, or for loading, wheelchairs
    • A61G3/02—Loading or unloading personal conveyances; Facilitating access of patients or disabled persons to, or exit from, vehicles
    • A61G3/06—Transfer using ramps, lifts or the like
    • A61G3/062—Transfer using ramps, lifts or the like using lifts connected to the vehicle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G3/00—Ambulance aspects of vehicles; Vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances, e.g. for facilitating access of, or for loading, wheelchairs
    • A61G3/02—Loading or unloading personal conveyances; Facilitating access of patients or disabled persons to, or exit from, vehicles
    • A61G3/06—Transfer using ramps, lifts or the like
    • A61G3/067—Transfer using ramps, lifts or the like with compartment for horizontally storing the ramp or lift

Definitions

  • the present invention relates to a lifting tray apparatus adapted to be fitted to the rear cargo area of a vehicle, whereby the lifting tray can be moved out of the vehicle and lowered to the ground to allow a wheelchair to be wheeled onto the tray and then raised and moved into the vehicle for transportation of the wheel chair.
  • the lift is located at the rear of the vehicle and is raised and lowered between the ground engaging position and the floor height on roller assemblies running along channels at the rear of the vehicle, but in its storage position is folded underneath the vehicle.
  • This method is not readily suitable for small "people mover" vehicles, as it interferes with the road clearance of the vehicle and usually requires alteration to the exhaust system.
  • the present invention seeks to ameliorate these disadvantages, by providing a lifting tray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift tray is slide externally from the vehicle and lowered to the ground for access to the lift tray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting tray apparatus comprising:
  • a pair of opposed first slides adapted to be connected to the floor of the vehicle
  • a lift tray adapted to slide along and between said second slide
  • each swing arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting tray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle.
  • the invention comprises a lifting tray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift fray is slide externally from the vehicle and lowered to the ground for access to the lift fray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting fray apparatus comprising:
  • a pair of opposed first slides adapted to be connected to the floor of the vehicle
  • a lift tray adapted to slide along and between said second slides, and having a rear end
  • first bowden cable having one end connected adjacent the end of one of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting arm, and secured to said lift fray;
  • second bowden cable having one end connected adjacent the end of the other of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting arm, and secured to said lift tray;
  • a third bowden cable having one end connected to the lift fray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the one of the first slides,
  • a fourth bowden cable having one end connected to said lift tray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the other of the first slide,
  • the first and third bowden cables pull around their respective pulleys and pull the lift fray along the second slides to an rearwardly extended position, and whereby when the carriages are driven along the first slides, away from the rear of the vehicle, the second and third bowden cables pull the tray along the second slides into the vehicle,
  • each lifting arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting tray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle.
  • Figure 1 shows schematically a plan view of the lifting fray connected to one half of the track arrangement of a lifting tray apparatus according to one embodiment of the present invention
  • Figure 2 shows schematically an end view of the track arrangement of the lifting fray arrangement shown in figure 1 ;
  • Figure 3 shows schematically a plan view of the lifting tray apparatus illustrated in figure 1 in its fully extended position
  • Figure 4 illustrates one embodiment of a bearing carriage for the swing arm
  • Figure 5 illustrates a cut away end view of the view shown in figure 4
  • Figure 6 the shape of one component of the swing arm according to one embodiment of the present invention
  • Figure 7 illustrates the swing arm as formed by two of the components shown in figure 6, in its horizontal mode
  • Figure 8 shows the swing arm in its lowered position with the lift tray in its ground engaging position
  • FIG. 9 shows schematically the engagement of the swing arm operating means on the components of the swing arm
  • FIGS 10 and 11 illustrates schematically the arrangement of one of the bowden cables to drive the lifting tray to its extended position
  • Figures 12 and 13 illustrate schematically the arrangement of the other bowden cable to drive the lifting tray to its retracted position
  • Figure 14 illustrates another embodiment of a bearing carriage for the lifting arm
  • Figure 15 illustrates a cut away end view of the view shown in figure 14.
  • the lifting tray apparatus (1) is attached onto the floor (2) of a rear opening "people mover", so as to be able to load and transport wheel chair passengers.
  • a pair of first slides (3) is secured to the floor of the vehicle, a predetermined distance above the floor, in this case, with the openings (4) of the slides (3) facing inwardly.
  • a suitable bearing carriage (5) as shown in figures 4 & 5, travels along each slide (3) on rollers (6). Attached to the bearing carriage (5) at end (7) is the first end (10) of the swing arm (8), which is hung below the slides (3).
  • a second slide (9) is attached to the other end (11) of the swing arm (8), and extends back towards the first end (10) of the swing arm (8).
  • the lifting tray (13) is connected adjacent its mid point on each side to a fray holder bearing carriage (12) which is adapted to travel along the respective slides (9).
  • the swing arm (8) preferably, comprises two identical components (16 & 17) as shown in figure 6, which are connected together, as shown in figure 7 such that each long side (14) overlays the short side (15) of the other component.
  • the components (16 & 17) at the end (10) are pivotally connected to each other and the bearing carriage (5) and at the other end (11) are pivotally connected to each other and the fray holder bearing carriage (12), forming a parallelogram linkage such that the tray (13) retains the same substantially horizontal orientation during its raising and lowering to the ground.
  • a suitable operating means in this case a hydraulic ram (18) is connected, as shown in figure (9) from the lower component (16) diagonally to the top component (17). Therefore when the hydraulic ram (18) is retracted, the swing arm (8) swings downwardly as the distance across the diagonal is decreased, lowering the lifting tray (13) to the ground.
  • a pressure switch (not shown) is connected in the hydraulic line such that when the lifting tray (13) is lowered to the ground a piston causes the tailgate to be lowered to the ground, such that a wheel chair can be rolled onto the lifting tray (13).
  • the tailgate is connected to a pivot rod that is rotated by the piston, by means of wires connected to cams on the pivot rod.
  • the tray (13) is then raised, by extending the hydraulic ram (18), which lengthens the diagonal across the swing arm (8) causing the swing arm (8) to swing upwardly.
  • the tailgate pivots to an upright position, preventing the wheel chair from rolling rearwardly out of the tray (13).
  • the lifting fray (13) on its carriage (12) is slid along the slides (9).
  • the swing arm (8) on its bearing carriage (5) is slide along the slides (3), to its transport position as shown in figure 1.
  • Any suitable operating means such as worm drives, rack and pinion or hydraulically operated cylinders can be used to move the carriages (5 & 12) along their respective slides (3 & 9).
  • the tray (13) is in its transport position, the tray is lowered to the floor of the vehicle and a front flap is raised to prevent the wheelchair from rolling off the tray (13).
  • FIGS 14 & 15 A further embodiment is shown in figures 14 & 15, in which the tracks of the slide (3) are in the form of v-fracks (19) with the rollers (6) having a complementary periphery.
  • An off centred roller (20) can be attached between the rollers (6) to adjust the engagement between the rollers (6) and the tracks (19).
  • the slides and swing arm operate in the same manner as described previously, except in the following manner.
  • This problem was solved by the use of bowden cables, to slide the various components along their respective slides.
  • a first bowden cable (21) is connected at one end (22) to the lifting tray (13) and passes around a pulley (23) connected to the carriage (5) or the free end of said lifting arm (8) and through a fixed sheath (23), which is fixedly connected to the carriage (5).
  • the other end (25) is secured to the vehicle.
  • a second bowden cable (26) is used as shown in figures 12 and 13, on each side of the apparatus.
  • the cable (26) is connected at one end (27) to the tray (13) and though the fixed sheath (28), which is secured to the carriage (5).
  • the other end (29) of the cable (26) passes around a pulley (30) and is secured to the vehicle or the slide (3).
  • a spring (not shown) is connected to one end of each bowden cable to lessen any stretching of the cables. Further an adjustment can be located at the other end to overcome any stretching of the cables.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

A lifting tray apparatus for a wheelchair, adapted to be fitted to the floor (2) of a vehicle. A lift tray is slid externally from the vehicle and lowered to the ground for access to the lift tray and raised to the level above the ground floor of the vehicle and slid into the vehicle to its transportation position. The lifting tray apparatus comprises a first pair of opposed slides (3) adapted to be connected to the floor (2) of the vehicle. A pair of swing arms (8), adapted to slide along the first slides (3), each having a free end connected to a second pair of slides (9). The lift tray is adapted to slide along and between the second slides. Each swing arm is in the form of a parallel linkage and has operating means connected across one of its diagonals. When the lifting tray is slid externally of the vehicle, by altering the length of the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle. In an alternative embodiment, bowden cable pull the tray along the slides.

Description

Wheel chair swing arm lift
The present invention relates to a lifting tray apparatus adapted to be fitted to the rear cargo area of a vehicle, whereby the lifting tray can be moved out of the vehicle and lowered to the ground to allow a wheelchair to be wheeled onto the tray and then raised and moved into the vehicle for transportation of the wheel chair.
There are prior art wheelchair lifts which require modification to the floor of the vehicle, wherein a well open to the rear or side of the vehicle has to be cut into the floor of the vehicle and additional bracing, and, in some cases, modification to the suspension, required. See for example US patent no. 4,804,308 - Hamblin.
In another form, such as US patent no. 3,887,092 - Leet, the tailgate in its lowered position acts as the lift and is raised and lowered between the ground engaging position and the floor height on roller assemblies running along channels at the rear of the vehicle. Such a structure is not readily useable with small "people mover " vans due to the extensive modifications required.
In a further form, such as shown in US patent 4,930,969 - Langer, the lift is located at the rear of the vehicle and is raised and lowered between the ground engaging position and the floor height on roller assemblies running along channels at the rear of the vehicle, but in its storage position is folded underneath the vehicle. This method is not readily suitable for small "people mover" vehicles, as it interferes with the road clearance of the vehicle and usually requires alteration to the exhaust system.
The present invention seeks to ameliorate these disadvantages, by providing a lifting tray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift tray is slide externally from the vehicle and lowered to the ground for access to the lift tray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting tray apparatus comprising:
a pair of opposed first slides, adapted to be connected to the floor of the vehicle;
a pair of swing arms, each adapted to slide along a respective first slide and having a free end;
a pair of second slides, each connected adjacent the free end of a respective swing arm;
a lift tray adapted to slide along and between said second slide,
whereby each swing arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting tray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle. In another form the invention comprises a lifting tray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift fray is slide externally from the vehicle and lowered to the ground for access to the lift fray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting fray apparatus comprising:
a pair of opposed first slides, adapted to be connected to the floor of the vehicle;
a pair of carriages, each adapted to slide along a respective first slide
a pair of lifting arms, each pivotally connected to a respective carriage and having a free end;
a pair of second slides, each connected adjacent the free end of a respective swing arm;
a lift tray adapted to slide along and between said second slides, and having a rear end
a first bowden cable having one end connected adjacent the end of one of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting arm, and secured to said lift fray; a second bowden cable having one end connected adjacent the end of the other of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting arm, and secured to said lift tray;
a third bowden cable having one end connected to the lift fray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the one of the first slides,
a fourth bowden cable having one end connected to said lift tray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the other of the first slide,
whereby as the carriages are driven along the first slides towards the rear of the vehicle, the first and third bowden cables pull around their respective pulleys and pull the lift fray along the second slides to an rearwardly extended position, and whereby when the carriages are driven along the first slides, away from the rear of the vehicle, the second and third bowden cables pull the tray along the second slides into the vehicle,
and whereby each lifting arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting tray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle.
The present invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 shows schematically a plan view of the lifting fray connected to one half of the track arrangement of a lifting tray apparatus according to one embodiment of the present invention;
Figure 2 shows schematically an end view of the track arrangement of the lifting fray arrangement shown in figure 1 ;
Figure 3 shows schematically a plan view of the lifting tray apparatus illustrated in figure 1 in its fully extended position;
Figure 4 illustrates one embodiment of a bearing carriage for the swing arm;
Figure 5 illustrates a cut away end view of the view shown in figure 4
Figure 6 the shape of one component of the swing arm according to one embodiment of the present invention; Figure 7 illustrates the swing arm as formed by two of the components shown in figure 6, in its horizontal mode;
Figure 8 shows the swing arm in its lowered position with the lift tray in its ground engaging position;
Figure 9 shows schematically the engagement of the swing arm operating means on the components of the swing arm;
Figures 10 and 11 illustrates schematically the arrangement of one of the bowden cables to drive the lifting tray to its extended position;
Figures 12 and 13 illustrate schematically the arrangement of the other bowden cable to drive the lifting tray to its retracted position;
Figure 14 illustrates another embodiment of a bearing carriage for the lifting arm; and
Figure 15 illustrates a cut away end view of the view shown in figure 14.
The lifting tray apparatus (1) is attached onto the floor (2) of a rear opening "people mover", so as to be able to load and transport wheel chair passengers. As shown in figures 1 & 2, a pair of first slides (3) is secured to the floor of the vehicle, a predetermined distance above the floor, in this case, with the openings (4) of the slides (3) facing inwardly. A suitable bearing carriage (5), as shown in figures 4 & 5, travels along each slide (3) on rollers (6). Attached to the bearing carriage (5) at end (7) is the first end (10) of the swing arm (8), which is hung below the slides (3). A second slide (9) is attached to the other end (11) of the swing arm (8), and extends back towards the first end (10) of the swing arm (8). The lifting tray (13) is connected adjacent its mid point on each side to a fray holder bearing carriage (12) which is adapted to travel along the respective slides (9).
The swing arm (8), preferably, comprises two identical components (16 & 17) as shown in figure 6, which are connected together, as shown in figure 7 such that each long side (14) overlays the short side (15) of the other component. The components (16 & 17) at the end (10) are pivotally connected to each other and the bearing carriage (5) and at the other end (11) are pivotally connected to each other and the fray holder bearing carriage (12), forming a parallelogram linkage such that the tray (13) retains the same substantially horizontal orientation during its raising and lowering to the ground.
A suitable operating means, in this case a hydraulic ram (18) is connected, as shown in figure (9) from the lower component (16) diagonally to the top component (17). Therefore when the hydraulic ram (18) is retracted, the swing arm (8) swings downwardly as the distance across the diagonal is decreased, lowering the lifting tray (13) to the ground.
A pressure switch (not shown) is connected in the hydraulic line such that when the lifting tray (13) is lowered to the ground a piston causes the tailgate to be lowered to the ground, such that a wheel chair can be rolled onto the lifting tray (13). Preferably the tailgate is connected to a pivot rod that is rotated by the piston, by means of wires connected to cams on the pivot rod.
The tray (13) is then raised, by extending the hydraulic ram (18), which lengthens the diagonal across the swing arm (8) causing the swing arm (8) to swing upwardly. As soon as the lifting tray (13) begins to rise, the tailgate pivots to an upright position, preventing the wheel chair from rolling rearwardly out of the tray (13). When the swing arm (8) reaches its upper position, the lifting fray (13) on its carriage (12) is slid along the slides (9). Further the swing arm (8) on its bearing carriage (5) is slide along the slides (3), to its transport position as shown in figure 1. Any suitable operating means such as worm drives, rack and pinion or hydraulically operated cylinders can be used to move the carriages (5 & 12) along their respective slides (3 & 9). Preferably once the tray (13) is in its transport position, the tray is lowered to the floor of the vehicle and a front flap is raised to prevent the wheelchair from rolling off the tray (13). A further embodiment is shown in figures 14 & 15, in which the tracks of the slide (3) are in the form of v-fracks (19) with the rollers (6) having a complementary periphery. An off centred roller (20) can be attached between the rollers (6) to adjust the engagement between the rollers (6) and the tracks (19). The slides and swing arm operate in the same manner as described previously, except in the following manner.
As the tray (13) has to be lowered to the ground and the tray (13), naturally, is moved out of the plane of the slides (3 & 9), a problem arose in providing a reliable operating means to slide the various components along their respective slides, while allowing for the tray (13) to swing down to the ground. This problem was solved by the use of bowden cables, to slide the various components along their respective slides. As shown in figure 10 and 11, a first bowden cable (21) is connected at one end (22) to the lifting tray (13) and passes around a pulley (23) connected to the carriage (5) or the free end of said lifting arm (8) and through a fixed sheath (23), which is fixedly connected to the carriage (5). The other end (25) is secured to the vehicle. Thereby as the lifting arms (8) on their carriages (5) fravel along the slides (3), the cable (21) pulls the tray (13) and its carriage (12) along the slide (9) on the lifting arms (8). A similar bowden cable arrangement is fitted to each side of the apparatus.
To refract the tray (13) a second bowden cable (26) is used as shown in figures 12 and 13, on each side of the apparatus. The cable (26) is connected at one end (27) to the tray (13) and though the fixed sheath (28), which is secured to the carriage (5). The other end (29) of the cable (26) passes around a pulley (30) and is secured to the vehicle or the slide (3). Thus as the carriage (5) slides into the vehicle along the slide (3) bowden cable (26) refracts the lifting fray (13) along the slide (9) on the lifting arms (8).
Preferably a spring (not shown) is connected to one end of each bowden cable to lessen any stretching of the cables. Further an adjustment can be located at the other end to overcome any stretching of the cables.
It should be obvious to people skilled in the art that modifications and alterations to the above embodiments can be made without departing from the scope and the spirit of the present invention.

Claims

The claims are:
1. a lifting tray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift fray is slide externally from the vehicle and lowered to the ground for access to the lift tray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting tray apparatus comprising:
a pair of opposed first slides, adapted to be connected to the floor of the vehicle;
a pair of swing arms, each adapted to slide along a respective first slide and having a free end;
a pair of second slides, each connected adjacent the free end of a respective swing arm;
a lift tray adapted to slide along and between said second slide,
whereby each swing arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting fray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle.
2. The tray lifting apparatus according to claim 1 wherein the operating means is a hydraulic ram.
3. a lifting fray apparatus adapted to be fitted to the floor of a vehicle, whereby a lift tray is slide externally from the vehicle and lowered to the ground for access to the lift tray and raised to the level above the floor of the vehicle and slide into the vehicle to its transportation position, said lifting tray apparatus comprising:
a pair of opposed first slides, adapted to be connected to the floor of the vehicle;
a pair of carriages, each adapted to slide along a respective first slide
a pair of lifting arms, each pivotally connected to a respective carriage and having a free end;
a pair of second slides, each connected adjacent the free end of a respective swing arm;
a lift tray adapted to slide along and between said second slides, and having a rear end
a first bowden cable having one end connected adjacent the end of one of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting ami, and secured to said lift tray;
a second bowden cable having one end connected adjacent the end of the other of the first slides, remote from the rear of the vehicle, the cable passing through a rigid sheath secured to the respective carriage and the other end passing around a pulley, which is connected to said carriage or free end of said lifting arm, and secured to said lift tray;
a third bowden cable having one end connected to the lift tray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the one of the first slides,
a fourth bowden cable having one end connected to said lift tray, the cable passing through a rigid sheath secured to the respective carriage and around a pulley thereon, with the other end secured adjacent the rear end of the other of the first slide,
whereby as the carriages are driven along the first slides towards the rear of the vehicle, the first and third bowden cables pull around their respective pulleys and pull the lift tray along the second slides to an rearwardly extended position, and whereby when the caniages are driven along the first slides, away from the rear of the vehicle, the second and third bowden cables pull the tray along the second slides into the vehicle, and whereby each lifting arm is in the form of a parallelogram linkage, and has operating means connected across one of its diagonals, such that with the lifting fray slid externally of the vehicle, by altering the length the diagonal, the swing arm moves the lifting tray between a ground engaging position and a position above the floor of the vehicle.
4. A lifting tray apparatus according to claim 3, wherein the operating means is a hydraulic ram.
5. A lifting fray apparatus substantially as hereinbefore described with reference to the accompanying drawings.
PCT/AU2000/000885 2000-07-25 2000-07-25 Wheel chair swing arm lift WO2002007666A1 (en)

Priority Applications (2)

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AU2000259547A AU2000259547A1 (en) 2000-07-25 2000-07-25 Wheel chair swing arm lift
PCT/AU2000/000885 WO2002007666A1 (en) 2000-07-25 2000-07-25 Wheel chair swing arm lift

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1462409A1 (en) * 2003-03-24 2004-09-29 Uwe Rudolf Wilhelm Lehmann Lifting platform with Bowden cable

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FR2595389A1 (en) * 1986-03-05 1987-09-11 Courtecuisse Roland Device for assembling construction panels and panels provided with these assembly devices
US4909700A (en) * 1989-02-03 1990-03-20 Invercan, Inc. Lift for wheelchairs
JPH08188079A (en) * 1995-01-12 1996-07-23 Toyota Auto Body Co Ltd Platform slide device of vehicle lifter
JPH08300999A (en) * 1995-05-08 1996-11-19 Toyota Auto Body Co Ltd Link guide mechanism of lifter for vehicle
JPH11113964A (en) * 1997-10-07 1999-04-27 Wako Kogyo Kk Platform moving apparatus for wheelchair

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EP1462409A1 (en) * 2003-03-24 2004-09-29 Uwe Rudolf Wilhelm Lehmann Lifting platform with Bowden cable

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