EP0526088A1 - Chaises roulantes - Google Patents

Chaises roulantes Download PDF

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Publication number
EP0526088A1
EP0526088A1 EP92306695A EP92306695A EP0526088A1 EP 0526088 A1 EP0526088 A1 EP 0526088A1 EP 92306695 A EP92306695 A EP 92306695A EP 92306695 A EP92306695 A EP 92306695A EP 0526088 A1 EP0526088 A1 EP 0526088A1
Authority
EP
European Patent Office
Prior art keywords
frame
seat
wheelchair
wheelchair according
frame element
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP92306695A
Other languages
German (de)
English (en)
Other versions
EP0526088B1 (fr
Inventor
Moshe Levy
Zvi Gilad-Smolinsky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TZORA FURNITURE INDUSTRIES Ltd
TZORA FURNITURE IND Ltd
Original Assignee
TZORA FURNITURE INDUSTRIES Ltd
TZORA FURNITURE IND 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 TZORA FURNITURE INDUSTRIES Ltd, TZORA FURNITURE IND Ltd filed Critical TZORA FURNITURE INDUSTRIES Ltd
Publication of EP0526088A1 publication Critical patent/EP0526088A1/fr
Application granted granted Critical
Publication of EP0526088B1 publication Critical patent/EP0526088B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61G5/045—Rear 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
    • 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
    • A61G5/006—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs convertible to stretchers or beds
    • 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
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/085—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding up and down, e.g. reducing or expanding the overall height of the wheelchair
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0891—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having rigid supports, e.g. seat or back supports which retain their shape after folding of the wheelchair
    • 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
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • 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
    • A61G5/10—Parts, details or accessories
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/125—Rests specially adapted therefor, e.g. for the head or the feet for arms
    • 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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/128—Rests specially adapted therefor, e.g. for the head or the feet for feet
    • 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
    • A61G5/14—Standing-up or sitting-down aids
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/107—Arrangements for adjusting the seat positioning the whole seat forward or rearward

Definitions

  • the present invention relates to hand-propelled wheelchairs.
  • the present invention relates to improved wheelchairs enabling the variance of the center of gravity of the user and the seat of the wheelchair with reference to the axis of the drive wheels.
  • U.S. Patent 4,310,167 describes and claims a variable position center of gravity wheelchair comprising an articulated chassis having a sub frame to which is mounted a pair of main wheels and a rear caster wheel, and a seat frame assembly carrying a seat and a front caster wheel and connected to the sub frame for movement relative thereto between a first position with the seat positioned over the main wheels and a second position forwardly of the main wheels to facilitate curb climbing; said main wheels and front and rear caster wheels being arranged in a diamond pattern whereby lateral drift of the wheelchair is minimized while traversing sloping surfaces; and resiliently yieldable means connected between the sub frame and seat frame assembly to minimise the tendency for the front caster wheel to lift off the ground when the main wheels are strongly propelled, and to provide shock absorption when traversing rough ground.
  • the principal object thereof was the design of a wheelchair which can traverse sloping surfaces without experiencing side drift and yet which may be easily manipulated to climb curbs and the like and which may traverse rough ground without undue discomfort to the user.
  • a still further object of said patent was to provide a movable center of gravity wheelchair in which the seat and thus the center of gravity is located essentially over the main wheels during normal use but in which means is provided for easily shifting the seat and center of gravity forwardly to remove weight from the main wheels to facilitate curb climbing.
  • the disadvantage of said arrangement is that it is limited to articulated movement of a sub frame comprising the seat and front caster wheel from a first position to a second position for curb climbing.
  • wheelchair constructions have remained unchanged, except for relatively minor features for a substantial period of time. While wheelchairs have existed for many years, they generally were constructed of a main frame, front and rear wheels, side rails or so-called "arm rests" and foot support members. However, there was no means for creating or manufacturing a wheelchair of different sizes, at a relatively low cost, from standard sized components, in order to accommodate different size users.
  • Prior art wheelchair manufacturers constructed several different sized wheelchairs and used different sized components for each of the differently sized wheelchairs.
  • the main frame had to be larger, the seat located in a different position, and a foot support member extended further from the seat, than in the case of a wheelchair for a smaller individual.
  • the seat may have to be located at a higher elevation in order to permit the user to engage rims on the wheels for propelling the wheelchair in an easy and convenient manner.
  • wheelchairs heretofore constructed were not designed,to permit any form of athletic activity, and particularly, for fast-moving sports activities. This was primarily due to the fact that the prior art wheelchairs were all of a box-like construction with the seat, and hence, the center of gravity, located at a fixed and at a substantial distance above the ground. Consequently, the prior art wheelchairs were not designed for any fast movement, and if one attempted to propel any of the prior art wheelchairs at any significant speed, or attempted to turn a corner quickly, the wheelchair might well tip over, causing injury to the user.
  • Minnebraker's approach to providing a multifunctional wheelchair which would be used for normal indoor and outdoor use as well as for sports activities was based on providing the frame with a plurality of axle receiving openings so that the center of gravity of the wheelchair could be altered by disassembling the wheelchair and repositioning the wheels relative to the frame.
  • the so-called “positioning angle” has been primarily employed in the prior art. By this means the seat back is adjusted for each application and then is fixedly locked in the adjustment position by means of this positioning angle.
  • the two front wheels are not directly connected with the frame bars of the seat surface, but instead they are pivotally connected to this frame so that they work as carrying bars which extend parallel to the seat surface frame bars.
  • they are also angularly adjustable as is illustrated for example on page 15 of the publication mentioned immediately above.
  • U.S. Patent 4,852,899 suggests that by adjusting two telescoping-type interengaging shiftable parts for each of two frame bars of a support frame of a lightweight wheelchair, the sitting position of the same can be adjusted with respect to the seat surface and with it the adjustment of the center of gravity can be dynamically adjusted with respect to the user.
  • said patent provides a lightweight wheelchair adjustable for a specific balance, comprising a seat arranged on two frame bars characterized in that the frame bars at the seat level have at least two parts telescopically adjustable relative to one another and adjustably connecting the back rest with the support frame to selectively shift the position of the back rest relative to the seat.
  • This arrangement has the disadvantage that the center of gravity is shifted by forcing the user to sit further back or further forward in the seat as a function of the positioning of the backrest which is a source of discomfort to the user.
  • a wheelchair comprising a base frame comprising a pair of side plates and a web extending between said side plates; a plurality of wheels including two drive wheels and at least one other wheel; means for propelling said drive wheels, said means consisting of hand engageable rim means associated with said drive wheels; means for mounting said wheels to said base frame, but so that the wheelbase thereof is substantially fixed; chair support means; and means for mounting said chair support means to said frame so that the position of said chair support means with respect to said frame and with respect to said drive wheels is adjustable, so that the center of gravity of said wheelchair is adjustable by adjusting the portion of said chair support means with respect to said frame, and without adjustment of the position of said drive wheels with respect to said frame, said means comprising: a pair of inner and outer flanges of said chair means for receipt of each of said frame side plates; means defining elongated openings in said web adjacent each of said side plates; and fastener means extending through said elongated openings into operative association with said chair support means
  • a hand-propelled wheelchair comprising a frame element to which is mounted a pair of large drive wheels and a pair of front caster wheels, said wheelchair further comprising a seat unit having a base and a back, said seat unit being slidably mounted on said frame in such a manner as to be manually slidable and arrestable in a plurality of desired positions along said frame element by the user while seated in the seat of the wheelchair to vary the center of gravity of the user and the seat unit with reference to the axis of the drive wheels without disassembly of the drive wheels, the frame element or the seat unit from each other.
  • said base and back are hingedly attached to each other, said base and back being arrestable in at least one position defining an angle of greater than 100° therebetween to provide a wheelchair with a reclining backrest.
  • the present invention provides for the first time a versatile multifunctional wheelchair having a multiplicity of possible positions of altered center of gravity effected by the user himself while comfortably sitting in the seat of the wheelchair.
  • the user when wishing to recline can simply move the center of gravity of himself and the seat unit forward with reference to the axis of the drive wheels so that upon reclining the wheelchair does not tip over backwards.
  • this problem can be ameliorated by simply sliding the seat backwards along the frame to an arrested position of minimal distance between the center of gravity and the axis of the drive wheels.
  • the manoeuvrability of a wheelchair is principally determined by the relationship between the center of gravity and the axis of the drive wheels.
  • the center of gravity is closer to the axis of the drive wheels, the effect on the casters is less and the wheelchair has greater manoeuvrability. Therefore, moving the center of gravity backwards adapts the wheelchair for greater manoeuvrability for sports and activities such as basketball and tennis.
  • Another problem solved by the present wheelchair is that of change in the center of gravity as a result of a change in the weight load in the chair.
  • the center of gravity of the chair is shifted from the optimum which existed before.
  • the user simply slides the seat in relation to the frame to find the best position which restores said optimum.
  • said frame element is rigid having a first frame bar defining a first axis to which said drive wheels are attached.
  • the seat unit is foldable onto the frame rather than the frame itself being foldable the seat can be orthopedically contoured for maximum comfort and support.
  • said seat unit is attached to said frame via a linkage arrangement for varying the vertical distance between said seat base and said frame.
  • said seat base is hingedly attached to at least one linkage arm which arm is in turn hingedly attached to a mounting member slidingly mounted on said frame.
  • said hinges include integral indent and/or guide and stop means which fully define and delimit predetermined angular positions of said linkage arm with respect to said base and said frame element and said hinges are designed so as to restrict the freedom of movement of said linkage arm to only one plane.
  • the wheelchair of the present invention can be used in conjunction with an electric drive attachment of the type described, e.g., in Israel specification 91588 corresponding to U.S.S.N. 07/575,222 filed 30.8.90 and the teachings of which are incorporated herein by reference.
  • the wheelchair can be used in conjunction with an electrically powered hydraulic or mechanical or pneumatic jack as described hereinafter.
  • FIGs. 1 and 2 a wheelchair provided with a frame element 10 to which is mounted a pair of large drive wheels 12 and a pair of front caster wheels 14.
  • a seat unit 16 having a base 18 and a back 20 supports also a pair of footrests 21, and is slidably mounted on the frame element 10, being manually slidable and arrestable in a plurality of desired positions along the frame element 10 by the user while seated in the seat unit 16 to vary the center of gravity of the user and the seat unit with reference to the first axis 22 of the drive wheels 12 without disassembly of any parts of the wheelchair.
  • the base 18 and the back 20 are both upholstered rigid bodies, thus providing the user with a comfortable seating posture for the extended time periods that the user is likely to remain seated. Furthermore, the base 18 and the back are hingedly attached to each other by the hinge 24, and are arrestable in various positions, at least one position defining an angle of greater than 100° therebetween to provide a wheelchair with reclining backrest as will be described with reference to Fig. 11.
  • the seat unit 16 is orthopedically contoured.
  • Armrests 26 are attached to back 20 by means of hinges 28, these too being arrestable at various angular positions.
  • Fig. 3 shows the same embodiment after disassembly, for purposes of transport or storage, of the drive wheels 12.
  • the frame element 10 is hingedly interconnected by a plurality of hinges 30, 32 having axes extending perpendicular to a vertical central plane of symmetry of the wheelchair.
  • the drive wheels 12, which are not shown in this figure, as they have been disassembled, are demountably attached to the first axis 22 of the frame element 10.
  • the back 20 is seen folded onto the base 18 which in turn is seen folded onto the frame element 10 to form the compact lightweight array shown.
  • the dimensions of the folded wheelchair may be reduced further than that shown in Fig. 3 by also disassembling the caster wheels 14.
  • the convenient demountability of the drive wheels 12 from the first axis 22 is of further utility for passage in very narrow pathways such as are found, for example, in passenger aircraft.
  • the auxiliary wheels 68 which will be described with reference to Fig. 9 are used, the drive wheels 12 having been disassembled.
  • Fig. 4 shows the frame element 10 which is rigid, having a first frame bar defining a first axis 22 to which drive wheels 12 are attachable. Therefore the wheelchair of the present invention, unlike most known wheelchairs, remains rigid in both horizontal directions. folding is achieved in the vertical direction, as has been explained with reference to Fig. 3.
  • the caster wheels 14 are revolvably supported in bearings 34.
  • the mounting member 36 will be described with reference to Fig. 6.
  • Fig. 5 the same embodiment as in Fig. 2 but is shown here adjusted to provide a high seating position such as might be required by a tall user.
  • the extra height shown is obtained by locking the linkage arm 38 in a vertical position.
  • the desired position of the center of gravity of the seat unit 16 with user can still be maintained at a desired location by moving the mounting member 36 as will be explained.
  • Figs. 6A and 6B show a preferred embodiment of the mounting member 36, which is provided with means for frictional engagement to the frame element 10. Means are provided for selectively clamping and unclamping the mounting member to the frame element 10.
  • these means are provided in the form of a coil spring 40 assembled around and frictionally engaging and clamping a horizontal member 42 of the frame element 10, one extremity 44 of the coil spring 40 being attached to the mounting member 36 and the remaining spring extremity 46 being attached to a tensioning device such as a cable 48, which when tensioned by the user by means of a handgrip 50 shown in Fig. 5, slightly unwinds and expands the coil spring 40 and thereby releases the frictional engagement between the coil spring 40 and the horizontal member 42.
  • a tensioning device such as a cable 48
  • a linear motion ball bearing 52 is shown supporting the mounting member 36 on the horizontal member 42.
  • a pair of low-cost sleeve bearings are used inside a mounting block of increased length.
  • the function of the described mounting member 36 is to support the linkage arm 38 as will be explained.
  • Fig. 7 shows the linkage arm 38 and a preferred embodiment of its hinges 30, 32.
  • the seat base 18 is hingedly attached to at least one linkage arm 38, which arm is in turn hingedly attached to the mounting member 36 which is slidingly mounted on the frame element 10.
  • Both hinges 30, 32 are configured to restrict the freedom of movement of the linkage arm 38 to only one vertical plane.
  • a fixed pin 54 is provided at each hinge center and a removable pin 56 is provided which is insertable in any of a plurality of apertures 58, so that the hinges 30, 32 include integral indent and/or guide and stop means which fully define and delimit predetermined angular positions of the linkage arm 38 with respect to the seat base 18 and the frame element 10.
  • FIG. 8 an embodiment of the wheelchair adapted to suit a standing user, or for use of a sitting or reclining user who wishes to assume a standing position but is unable to do so without help.
  • the linkage arm 38 is hingedly attached to the seat base 18 and is arrestable in at least one position defining an angle greater than 90° between the bottom surface of the seat base 18 and the linkage arm 38. Thereby the positioning of the seat base 18 in an orientation approaching perpendicular with the ground is achieved, for adaptation of the wheelchair for use as a stand-up wheelchair.
  • an electrically powered hydraulic, pneumatic or mechanical jack 60 is provided for selectively positioning the seat base 18 in an orientation approaching perpendicular to the ground. Obviously the removable pin 56 is previously removed from the upper hinge 30 to allow the jack 60 to carry out its function. A secondary linkage 62 is provided to change the angle between the base 18 and the back 20 as shown.
  • adjustable-height footrests 64 which are adjustable to assume a locked position at a height suitable for normal use or extended to contact the ground when the seat base 18 is oriented in a near-vertical position.
  • a preferred method of operating the adjustable height footrests 64 is by means of a second jack 66.
  • Fig. 9 shows a further embodiment provided with a pair of auxiliary wheels 68. These are positioned to the rear of the drive wheels 12 at a height above ground level such that the auxiliary wheels 68 contact the ground when the front caster wheels 14 are raised from the ground for a purpose such as going up a curb step 70. Preferably means are provided to allow the horizontal distance by which the auxiliary wheels 68 are behind the first axis 22 of the drive wheels to be varied.
  • the auxiliary wheels 68 are suspended from an arm 72 attached to the mounting member, whereby the horizontal position of the auxiliary wheels 68 may be conveniently varied by the user while remaining seated by moving the seat unit 16 horizontally forward or backward relative to the frame element 10.
  • the auxiliary wheels 68 thus prevent the wheelchair from overturning when moving the seat unit 16 backwards relative to the frame element 10 while travelling on side sloping surfaces or carrying out a "wheelie" manoeuvre.
  • undesirable contact between the auxiliary wheels 68 and the road surface can be avoided by the user moving the auxiliary wheels forward nearer the first axis 22 when their assistance is not required.
  • auxiliary wheels 68 can support the wheelchair when the drive wheels 12 have been removed for some purpose such as traverse of a narrow passage.
  • Fig. 10 shows yet a further embodiment of the wheelchair provided with an electric drive attachment 74.
  • Such attachments are well known and require no description.
  • An extension 76 of the frame element is added to provide a mounting member for the attachment 74.
  • the weight of the attachment 74 is compensated for by moving the seat unit 16 further forward than in previous embodiments.
  • Fig. 11 shows again the embodiment which has been previously described with reference to Fig. 2 but is here shown as adjusted for use by a reclining person. This has been achieved by, lowering the inclination of the back 20 by use of the hinge 24, and by raising the footrests 21 to a horizontal position. Such adjustment would be of utility to allow a user to sleep in the wheelchair and for hospitals for moving unconscious patients.
  • Fig. 12 shows the seat unit 16 mounted on horizontal sliding rails 78, 80. At least one rail is provided; the embodiment shown is provided with a pair of parallel rails.
  • the rails 78 are fixedly attached to the base 18, and are shaped to be guided by the rails 80 engaging the rails 78 and free to slide axially therealong.
  • the linkage arm 38 is attached to and supports the rail 80 via the hinge 30, whereby in conjunction with the hinge 32 the wheelchair may be collapsed when required as shown in Fig. 3.
  • the hinge 32 is fixedly attached to the frame element 10.
  • the height of the seat unit 16 may be altered by changing the angle of the linkage arm 38 as has been explained with reference to Fig. 7.
  • Figs. 13A and 13B show details of the rails 78, 80.
  • One edge of the rail 80 is provided with a series of apertures 82, any one of which may be engaged by a pin 84 connected by a short shaft 86 to the handgrip 50. Thereby the user, while remaining seated, may slide the seat unit 16 forward or backward to any desired position while temporarily releasing the pin 84 from engagement with the apertures 82.

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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)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Photovoltaic Devices (AREA)
  • Inert Electrodes (AREA)
EP92306695A 1991-07-23 1992-07-22 Chaises roulantes Expired - Lifetime EP0526088B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL98931 1991-07-23
IL98931A IL98931A0 (en) 1991-07-23 1991-07-23 Wheelchairs

Publications (2)

Publication Number Publication Date
EP0526088A1 true EP0526088A1 (fr) 1993-02-03
EP0526088B1 EP0526088B1 (fr) 1995-09-06

Family

ID=11062663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92306695A Expired - Lifetime EP0526088B1 (fr) 1991-07-23 1992-07-22 Chaises roulantes

Country Status (5)

Country Link
EP (1) EP0526088B1 (fr)
AT (1) ATE127332T1 (fr)
CA (1) CA2074393A1 (fr)
DE (1) DE69204594T2 (fr)
IL (1) IL98931A0 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697418A1 (fr) * 1992-11-05 1994-05-06 Konior Mario Assise multipositions notamment pour personnes handicapées.
WO2001026598A1 (fr) 1999-10-11 2001-04-19 Invacare Rea Ab Fauteuil roulant
US6459962B2 (en) 1999-08-31 2002-10-01 Deltaglide, Inc. Power assist vehicle
WO2003026550A1 (fr) * 2001-09-21 2003-04-03 Levo Ag Fauteuil roulant a relevage
WO2003045299A1 (fr) * 2001-11-28 2003-06-05 Niels Pieter Grobler Chaise roulante et chassis conçu pour une chaise roulante
US6946650B2 (en) 2002-03-04 2005-09-20 Independence Technology, L.L.C. Sensor
US7007963B2 (en) 2001-09-21 2006-03-07 Levo Ag Raising wheel chair
AT516072A1 (de) * 2014-07-15 2016-02-15 Bruno Walter Geländegängiger Rollstuhl

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013000724B4 (de) * 2013-01-17 2018-06-21 Bruno Walter Geländegängiger Rollstuhl

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US4544200A (en) * 1983-06-02 1985-10-01 Philip Dunn Wheelchair with rocking seat and reclining back feature
US4545593A (en) * 1983-11-04 1985-10-08 Farnam Jeffrey R Enhanced mobility wheelchair
GB2171898A (en) * 1985-02-19 1986-09-10 Remploy Ltd Reclining chairs
GB2201588A (en) * 1986-12-22 1988-09-07 Dermot Maynes Adjustable wheelchair

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4544200A (en) * 1983-06-02 1985-10-01 Philip Dunn Wheelchair with rocking seat and reclining back feature
US4545593A (en) * 1983-11-04 1985-10-08 Farnam Jeffrey R Enhanced mobility wheelchair
GB2171898A (en) * 1985-02-19 1986-09-10 Remploy Ltd Reclining chairs
GB2201588A (en) * 1986-12-22 1988-09-07 Dermot Maynes Adjustable wheelchair

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697418A1 (fr) * 1992-11-05 1994-05-06 Konior Mario Assise multipositions notamment pour personnes handicapées.
US6459962B2 (en) 1999-08-31 2002-10-01 Deltaglide, Inc. Power assist vehicle
WO2001026598A1 (fr) 1999-10-11 2001-04-19 Invacare Rea Ab Fauteuil roulant
EP1116480A1 (fr) * 1999-10-11 2001-07-18 Invacare Rea AB Fauteuil roulant
WO2003026550A1 (fr) * 2001-09-21 2003-04-03 Levo Ag Fauteuil roulant a relevage
US7007963B2 (en) 2001-09-21 2006-03-07 Levo Ag Raising wheel chair
US7219912B2 (en) 2001-09-21 2007-05-22 Levo Ag Raising wheel chair
WO2003045299A1 (fr) * 2001-11-28 2003-06-05 Niels Pieter Grobler Chaise roulante et chassis conçu pour une chaise roulante
US6946650B2 (en) 2002-03-04 2005-09-20 Independence Technology, L.L.C. Sensor
AT516072A1 (de) * 2014-07-15 2016-02-15 Bruno Walter Geländegängiger Rollstuhl
AT516072B1 (de) * 2014-07-15 2022-03-15 Walter Bruno Geländegängiger Rollstuhl

Also Published As

Publication number Publication date
DE69204594D1 (de) 1995-10-12
EP0526088B1 (fr) 1995-09-06
DE69204594T2 (de) 1996-04-11
IL98931A0 (en) 1992-07-15
ATE127332T1 (de) 1995-09-15
CA2074393A1 (fr) 1993-01-24

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