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WO2000008910A2 - Systeme de suspension elastique pour fauteuil roulant - Google Patents

Systeme de suspension elastique pour fauteuil roulant Download PDF

Info

Publication number
WO2000008910A2
WO2000008910A2 PCT/US1999/018558 US9918558W WO0008910A2 WO 2000008910 A2 WO2000008910 A2 WO 2000008910A2 US 9918558 W US9918558 W US 9918558W WO 0008910 A2 WO0008910 A2 WO 0008910A2
Authority
WO
WIPO (PCT)
Prior art keywords
structural member
resilient
wheelchair
resilient element
members
Prior art date
Application number
PCT/US1999/018558
Other languages
English (en)
Other versions
WO2000008910A3 (fr
Inventor
Robert A. Taylor
Original Assignee
Sunrise Medical Hhg Inc.
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 Sunrise Medical Hhg Inc. filed Critical Sunrise Medical Hhg Inc.
Priority to AU54872/99A priority Critical patent/AU5487299A/en
Publication of WO2000008910A2 publication Critical patent/WO2000008910A2/fr
Publication of WO2000008910A3 publication Critical patent/WO2000008910A3/fr

Links

Classifications

    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/043—Mid wheel drive
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1089—Anti-tip devices
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • 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
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps

Definitions

  • This invention relates in general to wheelchairs and more particularly, to wheelchair suspension systems. Most particularly, the invention relates to resilient wheelchair suspensions that support the wheelchair wheels independently of one another.
  • Wheelchairs generally include a frame that supports a pair of drive wheels and a pair of front casters.
  • the drive wheels and casters are typically rigidly supported by the wheelchair frame.
  • the drive wheels make contact with the ground and are driven to propel the wheelchair.
  • the drive wheels may be driven manually or powered by an electrical motor.
  • the wheelchair supports a seat assembly comprising a seat and a backrest.
  • the seat assembly is oriented above and between the drive wheels and the front casters to provide stability.
  • a problem with wheelchairs is that the drive wheels and casters typically fail to maintain contact with the ground as the wheelchair negotiates obstacles or irregular ground surfaces.
  • Various attempts have been made to overcome this problem.
  • One such attempt is set forth in U.S. Patent No. 4,128,137, issued to Eric Booth.
  • the Booth patent describes a suspension comprising a plate carrying a wheel unit and a bogie system.
  • the bogie system comprises two bogie units.
  • Each bogie unit includes a drive wheel and a caster wheel attached to a frame member.
  • the frame members pivot about a common transverse axis defined by brackets mounted to the plate to maintain contact with the ground.
  • Another attempt to maintain contact between the wheel and the ground is set forth in International Patent Application No. PCT/SE89/00647, which describes a wheelchair chassis having a central, transverse main shaft with two drive wheels, and a front and rear pair of wheels, each carried by individual supporting arms which are swingable in a plane.
  • anti-tip caster wheels are often provided rearward of the drive wheels. These anti-tip caster wheels are often mounted on arms rigidly coupled to the support frame and are angled downward to a level just above the ground. As the wheelchair begins to tip backwards, the anti-tip caster wheels engage the ground to prevent further tipping.
  • U.S. Patent No. 5,435,404 issued to Paul V. Garin III, describes an anti-tip device comprising a spring-biased arm for supporting a rear caster assembly.
  • the spring-biased arm is provided to absorb shock and provide greater comfort for the wheelchair occupant.
  • the spring-biased arm is provided to insure that substantially all the wheels and casters maintain contact with the ground.
  • a resilient device having deformable cushions is described in U.S. Patent No. 2,729,442, issued to Hermann J. Neidhart.
  • the device includes an outer member and an inner member, each of which are generally square in cross-section. Pockets are formed between the outer and inner members for receiving elastic cushioning elements.
  • the outer and inner members may be of any desired length and are substantially concentric with each other and mounted for relative coaxial rotation.
  • the cushioning elements are in the form of round rods and made of rubber. The cushioning elements are radially compressed to fit in the pockets. When a load is applied to the device in such a manner so as to rotate the inner member relative to the outer member, the cushioning elements are compressed between and outer and inner members.
  • a lever arm may be rigidly connected to the inner member for applying the load, and the outer member will be held against rotation. Similar devices are described in U.S. Patents No.
  • This invention relates to a wheelchair having a resilient suspension.
  • a resilient suspension member attached to the front end of the wheelchair frame supports a caster.
  • One embodiment of the invention has two structural members. One of the structural members is attached to the wheelchair frame and the other structural member is displaceable relative to the attached structural member. A pocket is defined between the two structural members. A resilient element is disposed within the pocket. The resilient element limits the displacement of the displaceable structural member.
  • the resilient suspension member supports a wheel.
  • FIG. 1 is a rear perspective view of a base frame assembly useful with the wheelchair suspension system of the invention.
  • Fig. 2 is a rear perspective view of the base frame assembly shown in Fig. 1, further showing resilient suspension members of the invention attached to the base frame assembly for supporting the wheelchairs wheels, and drive motors and an electronic controller for driving the wheelchair drive wheels.
  • Fig. 3 is an exploded perspective view of a resilient rear suspension member of the invention.
  • Fig. 4 is an enlarged sectional view of a portion of the resilient rear suspension member shown in Fig. 3.
  • Fig. 5 is an enlarged sectional view of a portion of a resilient drive wheel suspension member of the invention.
  • Fig. 6 is an enlarged side elevational view of the resilient drive wheel suspension member shown in Fig. 5 attached to a side of the base frame assembly.
  • Fig. 7 is an elevational view of the base frame assembly showing relative locations of the resilient front suspension members and the resilient rear suspension members of the invention.
  • Fig. 8 is an exploded perspective view of the resilient drive wheel suspension member shown in Figs. 5 and 6.
  • Fig. 9 is a perspective view of an alternative resilient drive wheel suspension member.
  • Fig. 10 is an elevational view of a manually operated wheelchair and resilient suspension members of the inventions attached to the wheelchair.
  • a power wheelchair base frame assembly 10 for supporting a wheelchair seat assembly (not shown). It should be understood that the base frame assembly 10 could be adapted to support any number of suitable wheelchair seat assemblies. It should also be understood that a wheelchair seat assembly could be attached to the base frame assembly 10 in any suitable manner.
  • the base frame assembly 10 has opposite sides 12, 14, a front end 16, and a rear end 18.
  • a footrest 26 (shown in Fig. 26) extends from the front end 16 of the base frame assembly 10.
  • the base frame assembly further includes an upper frame structure 20 and a lower frame structure 22.
  • the upper frame structure 20 includes opposite sides 24, 28 and a front end 30.
  • the lower frame structure 22 includes opposite sides 32, 34, a front end 36, and a rear end 38.
  • the upper frame structure 20 is spaced apart from the lower frame structure 22 and fixed relative to the lower frame structure 22 by vertically extending structural elements 40, 42.
  • the vertically extending structural elements 40, 42 have lower ends 46, 48 connected to corners of the lower frame structure 22 and upper ends 50, 52 connected to corners of the upper frame structure 20.
  • This configuration forms a base frame assembly having a substantially rectangular construction.
  • a substantially planar panel 54 is rigidly connected to the opposite sides 32, 34, the front end 36, and the rear end 38 of the lower frame structure 22 so as to be rigidly supported by the lower frame structure 22.
  • the planar panel 54 is provided to support a battery (not shown). It should be understood that this base frame assembly 10 described is for merely illustrative purposes and that the invention may be adapted for use with other wheelchair frame assemblies.
  • the base frame assembly 10 supports independent resilient suspension members, generally indicated at 56, 58 and 60 (shown more clearly in Fig. 8).
  • the independent resilient suspension members include resilient front suspension members 56, resilient rear suspension members 58, and resilient drive wheel suspension members 60.
  • the resilient front suspension members 56 are attached to opposite sides 12, 14 of the front end 16 of the base frame assembly 10.
  • the resilient rear suspension members 58 are attached to opposite sides 12, 14 of the rear end 18 of the base frame assembly 10.
  • the resilient drive wheel suspension members 60 are attached to opposite sides 12, 14 of the base frame assembly 10 intermediate the resilient front suspension members 56 and the resilient rear suspension members 58.
  • Each of the resilient suspension members 56, 58, 60 supports a wheel.
  • each of the resilient front suspension members 56 supports a front wheel 62.
  • the front wheels 62 are preferably casters.
  • Each of the resilient rear suspension members 58 supports a rear wheel 64.
  • the rear wheels 64 may also be casters.
  • each of the resilient drive wheel suspension members 60 supports a drive wheel 66.
  • the drive wheels 66 are preferably driven by a prime mover, such as the electric motor assembly 68 shown.
  • the electric motor assembly 68 may be controlled by an electrical controller 44 responsive to the occupant's voice or to signals produced by a control wand supported on the armrest (not shown) of the wheelchair.
  • the armrest could be an integral part of the wheelchair seat assembly.
  • FIG. 3 An example of a resilient suspension member is shown in Fig. 3. Although the resilient suspension member shown is a resilient rear suspension member 58, the resilient front suspension member 56 is configured in a similar manner.
  • the resilient rear suspension member 58 includes an outer structural member 70 and an inner structural member 72 disposed within the outer structural member 70. It is preferable that the outer structural member 70 and the inner structural member 72 be metal. However, it is conceivable that other materials may be suitable for carrying out the invention. Although the outer structural member 70 and the inner structural member 72 are substantially square, other geometric shapes may be employed. As shown in Fig. 4, the outer structural member 70 is positioned out of phase relative to the inner structural member 72 so as to form a plurality of pockets 74 between the outer structural member 70 and the inner structural member 72.
  • the outer structural member 70 is positioned forty- five degrees out of phase relative to the inner structural member 72, other phase angles may be suitable for carrying out the invention.
  • the relative positions of the outer structural member 70 and the inner structural member 72 may largely depend on the geometric shapes of the structural members 70, 72.
  • a resilient element 76 is disposed within each of the pockets 74.
  • the resilient element 76 is preferably an elastomeric material. Rubber or vulcanized rubber may be a suitable material. It should be understood that the resilient element 76 may be a natural and synthetic material. Urethanes or other polymers may be suitable for carrying out the invention.
  • the inner structural member 72 is rotatable relative to the outer structural member 70 along an axis of rotation, indicated at A. The resistance of the resilient element 76 to compression limits the rotation or torsional movement of the inner structural member 72.
  • a set of spaced apart tabs extends from an outer surface of the outer structural member 70.
  • the tabs 78 are provided to engage the rear end 38 of the lower frame structure 22, as is clearly shown in Fig. 2.
  • the tabs 78 have holes 98 which co-align with corresponding holes (not shown) in the rear end 38 of the lower frame structure 22 to receive a fastener (not shown) for affixing the outer structural member 70 to the base frame assembly 10.
  • the resilient front suspension member 56 may be attached to the front end 16 of the base frame assembly 10, as shown in Fig. 7, in a similar manner as well.
  • a lever 80 is shown attached to the inner structural member 72.
  • the lever 80 is provided for supporting the rear wheel 64.
  • the rear wheel 64 is supported at an end 82 of the lever 80 remote from the inner structural member 72.
  • the lever 80 may support the rear wheel 64 in any conventional manner.
  • a caster housing 84 may be provided at the end 82 of the lever 80 for rotatably receiving a caster stem (not shown).
  • An annular space (not shown) may be defined between an inner surface of the housing and the caster stem to receive bearings (also not shown).
  • An end 83 of the inner structural member 72 remote from the lever 80 has a threaded bore 86 for receiving a threaded stud 88.
  • the threaded stud 88 extends through a cap 90 for the outer structural member 70, and further through a series of washers 92, 94.
  • a lock nut 96 is engageable with the threaded stud 88 so as to confine the outer structural member 70 between the lever 80 and the cap 90.
  • Linear bearings 91, 93 may be employed between the lever 80 and the structural members 70, 72, and further between the inner structural member 72 and the cap 90 to eliminate or reduce axial frictional forces. It should be understood that other friction reduction elements, such as nylon washers (not shown), may be employed as well.
  • the resilient front suspension members 56 and the resilient rear suspension members 58 are attached to the base frame assembly 10 at different relative elevations. It should also be noted that the lengths of the levers 80, 81 and the angular displacement of the levers 80, 81 vary between the resilient front suspension members 56 and the resilient rear suspension members 58. It should further be noted that the front wheels 62 and the rear wheels 64 may be of different dimensions. These characteristics are dependent on one another and may be largely dependent on other physical characteristics of the wheelchair as well.
  • the resilient front suspension members 56 each support a traction acceleration ramp 100.
  • the traction acceleration ramps 100 are preferably welded to the resilient front suspension members 56. However, it should be understood that the traction acceleration ramps 100 may be attached in any suitable manner.
  • the resilient drive wheel suspension members 60 are configured in a manner similar to that of the resilient rear suspension members 58 and the resilient front suspension members 56. As shown in Fig. 8, the resilient drive wheel suspension members 60 each include an outer structural member 102 and an inner structural member 104 disposed within the outer structural member 102. A plurality of pockets 106 (more clearly shown in Fig. 5) are defined between the outer structural member 102 and the inner structural member 104. A resilient element 108 is disposed within each of the pockets 106 (also shown more clearly in Fig. 5).
  • the resilient element 108 is preferably an elastomeric material. As set forth above, the resilient element 108 may be rubber or vulcanized rubber. The resilient element 108 may be a natural or synthetic material. Urethane or other polymers may be suitable for carrying out the invention.
  • the inner structural member 104 is rotatable relative to the outer structural member 102 along an axis of rotation, indicated at B, and the resistance of the resilient element 108 to compression limits such rotation.
  • the tabs 110 are provided to support the electric motor assembly 68.
  • the tabs 110 define a motor mount.
  • the tabs 1 10 have holes 115 that co-align with corresponding holes (not shown) in the electric motor assembly 68 (shown in Fig. 2) and are adapted to receive fasteners (not shown) for affixing the electric motor assembly 68 to the tabs 110.
  • the outer structural member 102 is disposed between two spaced apart brackets 112. Spacers 114 may be provided between the inner structural member 104 and the brackets 112 so as to center the outer structural member 102 between the brackets 112.
  • the brackets 112 shown are triangular shaped and have an offset upper end 111.
  • the offset upper end 111 is provided to compensate for the difference in the axial width of the outer structural member 102 and the sides 24, 28 of the upper frame structure 20 of the base frame assembly 10 to which the brackets 112 attach.
  • the offset upper end of each of the brackets 112 have holes 117 that co-align with holes (not shown) in the opposite sides 24, 28 of the upper frame structure 20.
  • Threaded fasteners 116 pass through the holes 117 in the brackets 112 and further through the holes in the sides 24, 28 of the upper frame structure 20.
  • the threaded fasteners 116 are engageable with lock nuts 118 to attach the brackets 1 12 to the upper frame structure 20 (as shown in Figs. 6 and 7).
  • An axial bore 120 passes through the inner structural member 104.
  • a threaded fastener 122 passes through the brackets 112, the inner structural member 104, and a series of washers 121, 123 and spacers 125.
  • a lock nut 113 engages the threaded fastener 122 to retain the outer structural member 102 within the inner structural member 104 between and the brackets 112.
  • the resilient elements 76, 108 set forth above each preferably have a cross-section larger than the cross-section of the pockets 74, 106 so as to be compressed when in the pockets 74, 106.
  • the resilient elements 76, 108 may be formed integrally positioned with one another, as shown in the drawings, or may be separate cylindrically shaped resilient elements (not shown) independent of one another. Resilient elements 76, 108 formed integrally with one another may be more effective in restricting the rotational displacement of the inner structural members 72, 104 relative to the outer structural members 70, 102.
  • the invention is not limited to resilient elements that are an extruded elastomer.
  • An elastomer may be injected into the pockets 74, 106.
  • An injected elastomer would bond to the outer structural members 70, 102 as well as the inner structural members 72, 104.
  • the resilient drive wheel suspension members 60 may be provided with a traction link arm 130 for supporting a traction link roller 132.
  • the traction link roller 132 is rotatable about an axis of rotation C that is spaced apart and substantially parallel to the axis of rotation B of the resilient drive wheel suspension member 60.
  • the traction link roller 132 is engageable with the traction acceleration ramp 100.
  • the traction link arm 130, the traction link roller 132, and the traction acceleration ramp 100 cooperatively form a traction linkage assembly, generally indicated at 134 (shown in Fig. 7). In operation, as illustrated in Fig. 7, the traction linkage assembly 134 ensures that a continuous contact is maintained between the drive wheels 66 and the ground.
  • the resilient suspension members 56, 58, 60 absorb shock sustained by the wheelchair when traversing an irregular ground surface to provide comfortable transportation. This is accomplished because of the compressive and decompressive nature of the resilient elements 76, 108.
  • the front wheels 62 are spaced apart from the drive wheels 66 sufficiently to reduce the risk of the wheelchair tipping forward.
  • the rear wheels 64 are spaced apart from the drive wheels 66 sufficiently to reduce the risk of the wheelchair tipping rearward. Note that clearance is provided between the traction link roller 132 and the traction acceleration ramp 100.
  • the resilient front suspension members 56 pivot about an axis of rotation in the direction of the arrow F. As this occurs, the resilient front suspension members 56 approach the traction link rollers 132. Upon contacting the traction acceleration ramp 100, the traction link roller 132 progresses up the traction acceleration ramp 100 and the resilient drive wheel suspension members 60 pivot about the axis of rotation B in the direction of the arrow G. As this occurs, the drive wheel 66 is forced downward so as to remain in contact with the ground. As the wheelchair tips rearward, the rear wheels 64 maintain contact with the ground.
  • the resilient rear suspension members 58 may pivot about the axis of rotation A in the direction of the arrow H so as to absorb shock encountered by the rearward tipping.
  • the resilient suspension members 56, 58, 60 Upon overcoming the obstacle, the resilient suspension members 56, 58, 60 return to a normal position. It should be understood that, as the wheelchair tips rearward, the resilient elements 76, 108 are compressed. As the wheelchair overcomes the obstacle, the resilient elements 76, 108 decompress. The resistance to compression increases as the as the compression increases so as to smoothly absorb shock or abrupt jolts. Likewise, the resistance to compression decreases as the resilient element 76, 108 decompresses to smoothly urge the resilient suspension members 56, 58, 60 back to a normal position.
  • the resilient rear suspension members 58 function as an anti-tip device to limit the amount of rearward tipping of the wheelchair.
  • a separate and independent resilient suspension member for each wheel permits each of the six wheels to react to irregular ground surfaces independent of all the other wheels.
  • an independent resilient suspension member need not be provided for all of the wheels.
  • independent resilient suspension members may be provided for the front wheels 62 only. However, such a configuration would not permit the drive wheels 66 to pivot.
  • a resilient suspension member may be provided to support a single wheel, like a single front wheel or a single rear wheel.
  • a manually operated wheelchair 136 is shown in Fig. 10 having resilient suspension members 56, 58, 59 supporting front wheels 62, rear wheels 64, and drive wheels 67.
  • the manually operated wheelchair 136 has a frame 138 having a front end 142, and a rear end 144. Although only one side 140 of the wheelchair is shown, it should be understood that the wheelchair has opposite sides.
  • a pair of resilient front suspension members 56 is attached to the front end 142 of the frame 138.
  • Each one of the resilient front suspension members 56 supports a front wheel 62, such as the caster shown.
  • the resilient front suspension members 56 each include a structural member, such as the inner structural member 72 shown in Fig. 3, movably attached to the front end 142 of the frame 138.
  • a resilient element, similar to the resilient element 76 shown in Fig. 3 acts upon the structural member 72 to resist movement of the structural member 72.
  • Each one of the resilient front suspension members 56 also includes an outer structural member, such as the outer structural member 70 shown in Fig. 3.
  • the inner structural member 70 is disposed within the outer structural member 70. Either the outer or inner structural members are attachable to the frame 138.
  • the other structural members are displaceable relative to the attachable structural member.
  • the outer structural member 70 (such as that shown in Fig.
  • FIG. 3 is attachable to the frame 138 and the inner structural member 72 (also shown in Fig. 3) is displaceable relative to the outer structural member 70.
  • One or more pockets 74 are defined between the outer structural members 70 and the inner structural members 72 (such as shown in Fig. 4).
  • a resilient element 76 disposed within each one of the pockets 74 (also shown in Fig. 4). The resilient elements 74 limit the displacement of said displaceable structural member 72.
  • Each displaceable structural member 72 is rotatably displaceable about an axis of rotation A.
  • Each one of the pockets 74 and the resilient elements 76 is elongated and extends substantially parallel with the axis of rotation.
  • the resilient elements 76 are preferably an elastomeric material. The elastomeric material may be extruded and compressed within the pocket. Alternatively, the elastomeric material may be injected into the pocket.
  • the manually operated wheelchair 136 shown also has resilient rear suspension members 58, similar the resilient rear suspension member 56 shown in Fig. 3.
  • the resilient rear suspension member 56 may support a fixed wheel or a caster, such as the caster shown.
  • the manually operated wheelchair 136 has resilient drive wheel suspension members 61, similar the resilient drive wheel suspension member 60 shown in Fig. 8.
  • the resilient drive wheel suspension members 61 of the manually operated wheelchair 136 are adapted to support a manually driven drive wheel, such as the manually driven wheel 67 shown in Fig. 10.
  • the operation of the resilient suspension members 56, 58, 60 on the manually operated wheelchair 136 is same or similar to that of the resilient suspension members 56, 58, 60 on the powered wheelchair base frame assembly 10 set forth above.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

L'invention concerne un fauteuil roulant doté d'une suspension élastique et comprenant un cadre qui comporte une extrémité avant et un élément de suspension élastique fixé à l'extrémité avant. L'élément de suspension avant élastique sert de support à une roulette. Dans un mode de réalisation de l'invention, le fauteuil comporte deux éléments de structure. Un des éléments de structure est fixé au cadre du fauteuil roulant et l'autre élément de structure peut être déplacé par rapport à l'élément de structure fixé. Une poche est définie entre les deux éléments de structure. Un élément élastique est disposé à l'intérieur de la poche. L'élément élastique limite le déplacement de l'élément de structure pouvant être déplacé. L'élément de suspension élastique sert de support à une roue.
PCT/US1999/018558 1998-08-14 1999-08-13 Systeme de suspension elastique pour fauteuil roulant WO2000008910A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54872/99A AU5487299A (en) 1998-08-14 1999-08-13 Resilient suspension system for a wheelchair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13480998A 1998-08-14 1998-08-14
US09/134,809 1998-08-14

Publications (2)

Publication Number Publication Date
WO2000008910A2 true WO2000008910A2 (fr) 2000-02-24
WO2000008910A3 WO2000008910A3 (fr) 2000-05-18

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WO (1) WO2000008910A2 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1349739A2 (fr) * 2000-10-27 2003-10-08 Invacare Corporation Chaise roulante capable de passer des obstacles
US6851711B2 (en) 2002-08-16 2005-02-08 Invacare Corporation Vehicle having an anti-dive/lockout mechanism
US7083195B2 (en) 2002-10-25 2006-08-01 Invacare Corporation Suspension with releasable locking system
WO2006102781A3 (fr) * 2005-03-31 2006-12-07 Degonda Rehab Sa Unite a roue pivotante et chaise roulante comprenant une unite a roue pivotante
US7264272B2 (en) 2004-03-16 2007-09-04 Pride Mobility Products Corporation Bi-directional anti-tip system for powered wheelchairs
US7389835B2 (en) 2003-10-08 2008-06-24 Pride Mobility Products Corporation Active anti-tip system for power wheelchairs
WO2009026731A1 (fr) * 2007-08-24 2009-03-05 Levo Ag Wohlen Véhicule comprenant un entraînement de roue médiane, en particulier fauteuil roulant ou fauteuil roulant verticaliseur
US7766106B2 (en) 2005-07-14 2010-08-03 Pride Mobility Products Corporation Powered wheelchair configurations and related methods of use
US7896394B2 (en) 2005-08-18 2011-03-01 Sunrise Medical Hhg, Inc. Midwheel drive wheelchair with independent front and rear suspension
US8851214B2 (en) 2010-07-15 2014-10-07 Permobil Ab Electric mid-wheel drive wheelchair
US9375372B2 (en) 2010-04-27 2016-06-28 Levo Ag Wohlen Stand-up unit for stand-up wheelchairs and chairs, particularly therapy chairs
US9603762B2 (en) 2007-02-08 2017-03-28 Invacare Corporation Wheelchair suspension
US9700470B2 (en) 2012-02-15 2017-07-11 Invacare Corporation Wheelchair suspension
US9775753B2 (en) 2013-05-17 2017-10-03 Dane Technologies, Inc. Methods, systems, and devices relating to multifunctional aircraft aisle wheelchair
US9827823B2 (en) 2007-02-14 2017-11-28 Invacare Corporation Stability control system
US9925100B2 (en) 2002-10-25 2018-03-27 Invacare Corporation Suspension for wheeled vehicles
US11096845B2 (en) 2009-10-09 2021-08-24 Invacare Corporation Wheelchair suspension
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
WO2022007285A1 (fr) * 2020-07-09 2022-01-13 仲兆宏 Véhicule en équilibre mobile sans barrière
US11903887B2 (en) 2020-02-25 2024-02-20 Invacare Corporation Wheelchair and suspension systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7040429B2 (en) 2001-10-10 2006-05-09 Invacare Corporation Wheelchair suspension

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601424A (en) * 1967-04-22 1971-08-24 Mechanical Services Trailer En Road-vehicle suspension systems
US4436320A (en) * 1981-03-25 1984-03-13 Everest & Jennings, Inc. Chassis for invalid wheelchairs
WO1990006097A1 (fr) * 1988-11-28 1990-06-14 Mercado Medic Ab Fauteuil roulant avec chassis a six roues
US4966386A (en) * 1986-07-18 1990-10-30 Alois Kober Kg Torsion spring bar axle for vehicle trailers
US5277450A (en) * 1992-07-07 1994-01-11 Henschen Curtiss W Multiple stage torsion axle
US5351774A (en) * 1992-06-02 1994-10-04 Quickie Designs Inc. Powered wheelchair with a detachable power drive assembly
US5435404A (en) * 1992-07-31 1995-07-25 Garin, Iii; Paul V. Powered mobility chair for individual
US5758896A (en) * 1995-10-27 1998-06-02 Chrysler Corporation Rubber torsion front suspension spring for lightweight motor vehicle
WO1998046184A1 (fr) * 1997-04-15 1998-10-22 Pride Health Care, Inc. Fauteuil roulant motorise a traction avant et capable de monter sur des bordures de trottoir
US5848658A (en) * 1997-10-06 1998-12-15 Invacare Corporation Adjustable front wheel stabilizer for power wheelchair
US5851019A (en) * 1997-05-01 1998-12-22 Caribbean Billing International, Ltd Wheel chair with independent suspension

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601424A (en) * 1967-04-22 1971-08-24 Mechanical Services Trailer En Road-vehicle suspension systems
US4436320A (en) * 1981-03-25 1984-03-13 Everest & Jennings, Inc. Chassis for invalid wheelchairs
US4966386A (en) * 1986-07-18 1990-10-30 Alois Kober Kg Torsion spring bar axle for vehicle trailers
WO1990006097A1 (fr) * 1988-11-28 1990-06-14 Mercado Medic Ab Fauteuil roulant avec chassis a six roues
US5531284A (en) * 1992-06-02 1996-07-02 Quickie Designs Inc. Powered wheelchair with a detachable power drive assembly
US5351774A (en) * 1992-06-02 1994-10-04 Quickie Designs Inc. Powered wheelchair with a detachable power drive assembly
US5411287A (en) * 1992-07-07 1995-05-02 Henschen; Curtiss W. Multiple stage torsion axle
US5277450A (en) * 1992-07-07 1994-01-11 Henschen Curtiss W Multiple stage torsion axle
US5435404A (en) * 1992-07-31 1995-07-25 Garin, Iii; Paul V. Powered mobility chair for individual
US5758896A (en) * 1995-10-27 1998-06-02 Chrysler Corporation Rubber torsion front suspension spring for lightweight motor vehicle
WO1998046184A1 (fr) * 1997-04-15 1998-10-22 Pride Health Care, Inc. Fauteuil roulant motorise a traction avant et capable de monter sur des bordures de trottoir
US5851019A (en) * 1997-05-01 1998-12-22 Caribbean Billing International, Ltd Wheel chair with independent suspension
US5848658A (en) * 1997-10-06 1998-12-15 Invacare Corporation Adjustable front wheel stabilizer for power wheelchair
EP0908165A2 (fr) * 1997-10-06 1999-04-14 Invacare Corporation Stabilisateur règlable de roue avant pour fauteuil roulant entraíné

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BF Goodrich Company, Torsilastic Spring Sales Brochure, 1986. *
Delta REHA Systems GMBH, Product Brochure, Hercules. *
Invacare Corporation, Ranger II MWD Product Brochure, 1998, *

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* Cited by examiner, † Cited by third party
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US7389835B2 (en) 2003-10-08 2008-06-24 Pride Mobility Products Corporation Active anti-tip system for power wheelchairs
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US7931300B2 (en) 2003-10-08 2011-04-26 Pride Mobility Products Corporation Anti-tip system for a power wheelchair
US9526664B2 (en) 2003-10-08 2016-12-27 Pride Mobility Products Corporation Anti-tip system for a power wheelchair
US8408598B2 (en) 2003-10-08 2013-04-02 Pride Mobility Products Corporation Anti-tip system for a power wheelchair
US7264272B2 (en) 2004-03-16 2007-09-04 Pride Mobility Products Corporation Bi-directional anti-tip system for powered wheelchairs
CH698063B1 (de) * 2005-03-31 2009-05-15 Degonda Rehab Sa Lenkradeinheit und Rollstuhl mit mindestens einer Lenkradeinheit.
WO2006102781A3 (fr) * 2005-03-31 2006-12-07 Degonda Rehab Sa Unite a roue pivotante et chaise roulante comprenant une unite a roue pivotante
US8292010B2 (en) 2005-07-14 2012-10-23 Pride Mobility Products Corporation Powered wheelchair configurations and related methods of use
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US9872804B2 (en) 2005-07-14 2018-01-23 Pride Mobility Products Corporation Powered wheelchair configurations and related methods of use
US7896394B2 (en) 2005-08-18 2011-03-01 Sunrise Medical Hhg, Inc. Midwheel drive wheelchair with independent front and rear suspension
US8210556B2 (en) 2005-08-18 2012-07-03 Sunrise Medical Hhg, Inc. Midwheel drive wheelchair with independent front and rear suspension
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US10532626B2 (en) 2007-02-14 2020-01-14 Invacare Corporation Stability control system
US11535078B2 (en) 2007-02-14 2022-12-27 Invacare Corporation Stability control system
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US11097589B2 (en) 2007-02-14 2021-08-24 Invacare Corporation Stability control system
WO2009026731A1 (fr) * 2007-08-24 2009-03-05 Levo Ag Wohlen Véhicule comprenant un entraînement de roue médiane, en particulier fauteuil roulant ou fauteuil roulant verticaliseur
US8118321B2 (en) 2007-08-24 2012-02-21 Levo Wohlen Vehicle with central wheel drive, in particular a wheelchair or stand-up wheelchair
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US10434019B2 (en) 2012-02-15 2019-10-08 Invacare Corporation Wheelchair suspension
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US9700470B2 (en) 2012-02-15 2017-07-11 Invacare Corporation Wheelchair suspension
US9775753B2 (en) 2013-05-17 2017-10-03 Dane Technologies, Inc. Methods, systems, and devices relating to multifunctional aircraft aisle wheelchair
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