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EP0339500A2 - Wheel chair - Google Patents

Wheel chair Download PDF

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Publication number
EP0339500A2
EP0339500A2 EP89107186A EP89107186A EP0339500A2 EP 0339500 A2 EP0339500 A2 EP 0339500A2 EP 89107186 A EP89107186 A EP 89107186A EP 89107186 A EP89107186 A EP 89107186A EP 0339500 A2 EP0339500 A2 EP 0339500A2
Authority
EP
European Patent Office
Prior art keywords
chair frame
drive
driven
wheelchair
spring
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
EP89107186A
Other languages
German (de)
French (fr)
Other versions
EP0339500A3 (en
EP0339500B1 (en
Inventor
Günter Meier
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.)
GUENTER MEIER GmbH
Original Assignee
GUNTER MEIER GmbH
Guenter Meier GmbH
MEIER GUENTER GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6823460&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0339500(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GUNTER MEIER GmbH, Guenter Meier GmbH, MEIER GUENTER GmbH filed Critical GUNTER MEIER GmbH
Priority to AT89107186T priority Critical patent/ATE86093T1/en
Publication of EP0339500A2 publication Critical patent/EP0339500A2/en
Publication of EP0339500A3 publication Critical patent/EP0339500A3/en
Application granted granted Critical
Publication of EP0339500B1 publication Critical patent/EP0339500B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame

Definitions

  • the invention relates to an electric motor-driven wheelchair for the disabled and the sick.
  • the flanged drives on the driven wheels are rigidly arranged with these wheels with respect to the chair frame, so that in the event of unevenness in the road surface, one or the other wheel is lifted off the road and the drive is uneven and the steering of the wheelchair is severely impaired.
  • the object of the invention is to provide an improved wheelchair while avoiding the aforementioned shortcomings, in which the driven wheels, even in the event of bumps in the road, always remain in contact with the road and thereby ensure uniform drive and proper steering of the wheelchair.
  • each driven wheel is cushioned separately with its electromotive drive relative to the chair frame.
  • the cushioning is formed by simple and cost-saving telescopic springs, which are articulated between the drive and the chair frame.
  • the rear wheels of the wheelchair are preferably driven and cushioned, but there is also the possibility of moving the drive and the suspension to the front wheels of the wheelchair.
  • each driven wheel (1) with its associated drive (2) is designed to be separately cushioned relative to the chair frame (3).
  • a telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension (4).
  • the spring (4) for each driven wheel (1) has one end in a joint (5) of the drive (2) sitting on the wheel axle (6) and the other end in a joint (7) on the chair frame (3 ) fixed, whereby the wheel (1) with drive (2) is resiliently mounted with respect to the chair frame (3).
  • the two rear wheels (1) of the wheelchair are each driven by an electric motor by a drive (2) and are cushioned against the chair frame (3).
  • the two drives (2) are movably connected to the chair frame (3) by means of ball-and-socket rods (8), as a result of which the spring movements of the wheels (1) in relation to the chair frame (3) which are uneven in the roadway are compensated.
  • the ball joint rods (8) are articulated with a length end in the center area of the wheelchair on a strut (3a) of the chair frame (3) and with the other length end on a drive (2).
  • the wheelchair is equipped with a sprung double drive as the drive system.

Landscapes

  • 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)
  • Invalid Beds And Related Equipment (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Materials For Medical Uses (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

In the wheelchair for handicapped and sick patients, which is driven by an electric motor, each driven wheel (1) with its drive (2) is provided with a separate suspension relative to the chair frame (3), a telescopic spring in the form of a gas compression spring, a shock absorber or the like being provided as the suspension (4) for each driven wheel (1). The spring (4) engages with one end in a joint of the drive (2), seated on the wheel axle (6), and is secured by the other end in a joint (7) on the chair frame (3). In a preferred manner, the two rear wheels (1) are driven and are provided with a spring suspension relative to the chair frame (3). <IMAGE>

Description

Die Erfindung bezieht sich auf einen elektromotorisch angetriebenen Rollstuhl für Behinderte und Kranke.The invention relates to an electric motor-driven wheelchair for the disabled and the sick.

Bei den bekannten, elektromotorisch angetriebenen Roll­stühlen sind die an den angetriebenen Rädern angeflanschten Antriebe mit diesen Rädern gegenüber dem Stuhlgestell starr angeordnet, so daß bei auftretenden Fahrbahnunebenheiten ein Abheben des einen oder anderen Rades von der Fahrbahn entsteht und dadurch der Antrieb ungleichmäßig und die Lenkung des Rollstuhles stark beeinträchtigt wird.In the known, electric motor-driven wheelchairs, the flanged drives on the driven wheels are rigidly arranged with these wheels with respect to the chair frame, so that in the event of unevenness in the road surface, one or the other wheel is lifted off the road and the drive is uneven and the steering of the wheelchair is severely impaired.

Aufgabe der Erfindung ist es, unter Vermeidung der vorge­nannten Mängel einen verbesserten Rollstuhl zu schaffen, bei dem die angetriebenen Räder, auch bei Fahrbahnuneben­heiten, stets mit der Fahrbahn in Kontakt bleiben und dadurch ein gleichmäßiger Antrieb und eine einwandfreie Lenkung des Rollstuhles gewährleistet wird.The object of the invention is to provide an improved wheelchair while avoiding the aforementioned shortcomings, in which the driven wheels, even in the event of bumps in the road, always remain in contact with the road and thereby ensure uniform drive and proper steering of the wheelchair.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß jedes angetriebene Rad mit seinem elektromotorischem Antrieb gegenüber dem Stuhlgestell separat abgefedert ist.This object is achieved in that each driven wheel is cushioned separately with its electromotive drive relative to the chair frame.

Weitere Merkmale der Erfindung sind aus den anderen Unter­ansprüchen zu entnehmen und der Gegenstand der Erfindung erstreckt sich nicht nur auf die Merkmale der einzelnen Ansprüche, sondern auch auf deren Kombination.Further features of the invention can be found in the other subclaims and the subject matter of the invention extends not only to the features of the individual claims, but also to their combination.

Durch die Erfindung ist eine separate Abfederung der angetriebenen Rollstuhlräder geschaffen worden, die unabhängig voneinander Fahrbahnunebenheiten ausgleichen und dadurch stets mit der Fahrbahn in Kontakt bleiben, was einen gleichmäßigen Antrieb des Rollstuhles bewirkt und eine einwandfreie Lenkmöglichkeit ergibt.Through the invention, a separate suspension of the driven wheelchair wheels has been created, which compensate for bumps independently of one another and thereby always remain in contact with the road, which causes a uniform drive of the wheelchair and provides a perfect steering option.

Hierdurch erhält die den Rollstuhl benutzende Person ein sicheres Fahrverhalten und durch die Abfederung zwischen angetriebenen Rädern und Stuhlgestell eine optimale Sitzeigenschaft.This gives the person using the wheelchair safe driving behavior and the cushioning between the driven wheels and the chair frame gives them optimal seating properties.

Die Abfederung ist von einfachen und kostensparenden Teleskopfedern gebildet, die gelenkig zwischen Antrieb und Stuhlgestell angeordnet sind.The cushioning is formed by simple and cost-saving telescopic springs, which are articulated between the drive and the chair frame.

IN bevorzugter Weise sind die Hinterräder des Rollstuhles angetrieben und abgefedert, es besteht jedoch auch die Möglichkeit, den Antrieb und die Abfederung auf die Vorderräder des Rollstuhles zu verlegen.The rear wheels of the wheelchair are preferably driven and cushioned, but there is also the possibility of moving the drive and the suspension to the front wheels of the wheelchair.

Auf der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt, welches nachfolgend näher erläutert wird. Es zeigt:

  • Fig. 1 eine Seitenansicht eines Rollstuhles mit zwischen Antrieb der Hinterräder und dem Stuhlgestell angeordneter Federung,
  • Fig. 2 eine Rückansicht des Rollstuhles mit den beiden Antrieben für jeweils ein Rad und der für jeden Antrieb vorgesehenen Federung.
In the drawing, an embodiment of the invention is shown, which is explained in more detail below. It shows:
  • 1 is a side view of a wheelchair with suspension arranged between the drive of the rear wheels and the chair frame,
  • Fig. 2 is a rear view of the wheelchair with the two drives for one wheel and the suspension provided for each drive.

Bei dem elektromotorisch angetriebenen Rollstuhl für Behinderte und Kranke ist jedes angetriebene Rad (1) mit seinem zugeordneten Antrieb (2) gegenüber dem Stuhlgestell (3) separat abgefedert ausgebildet.In the electric motor-driven wheelchair for the disabled and the sick, each driven wheel (1) with its associated drive (2) is designed to be separately cushioned relative to the chair frame (3).

Als Federung (4) ist dabei jeweils eine Teleskopfeder in Form einer Gasdruckfeder oder eines Stoßdämpfers vorgesehen. Die Feder (4) für jedes angetriebene Rad (1) ist dabei mit einem Ende in einem Gelenk (5) des auf der Radachse (6) sitzenden Antriebes (2) und mit seinem anderen Ende in einem Gelenk (7) am Stuhlgestell (3) festgelegt, wodurch das Rad (1) mit Antrieb (2) gegenüber dem Stuhlgestell (3) federnd gelagert ist.A telescopic spring in the form of a gas pressure spring or a shock absorber is provided as the suspension (4). The spring (4) for each driven wheel (1) has one end in a joint (5) of the drive (2) sitting on the wheel axle (6) and the other end in a joint (7) on the chair frame (3 ) fixed, whereby the wheel (1) with drive (2) is resiliently mounted with respect to the chair frame (3).

In bevorzugter Weise sind die beiden Hinterräder (1) des Rollstuhles durch je einen Antrieb (2) elektromotorisch angetrieben und gegenüber dem Stuhlgestell (3) abgefedert.Preferably, the two rear wheels (1) of the wheelchair are each driven by an electric motor by a drive (2) and are cushioned against the chair frame (3).

Die beiden Antriebe (2) sind über Kugelgelenkstangen (8) mit dem Stuhlgestell (3) beweglich verbunden, wodurch die bei Unebenheiten in der Fahrbahn auftretenden Federbewegungen der Räder (1) gegenüber dem Stuhlgestell (3) ausgeglichen werden.The two drives (2) are movably connected to the chair frame (3) by means of ball-and-socket rods (8), as a result of which the spring movements of the wheels (1) in relation to the chair frame (3) which are uneven in the roadway are compensated.

Durch diese Kugelgelenkstangen (8) werden gleichzeitig die auf den Radachsen (6) sitzenden Antriebe (2) gegen axiales Verdrehen gesichert.These ball joint rods (8) at the same time secure the drives (2) seated on the wheel axles (6) against axial rotation.

Die Kugelgelenkstangen (8) sind mit einem Längenende im Mittenbereich des Rollstuhles an einer Strebe (3a) des Stuhlgestelles (3) und mit dem anderen Längenende an einem Antrieb (2) angelenkt.The ball joint rods (8) are articulated with a length end in the center area of the wheelchair on a strut (3a) of the chair frame (3) and with the other length end on a drive (2).

Der Rollstuhl ist erfindungsgemäß mit einem abgefederten Doppelantrieb als Antriebssystem ausgestattet.According to the invention, the wheelchair is equipped with a sprung double drive as the drive system.

Claims (5)

1. Rollstuhl für Behinderte und Kranke mit elektromoto­rischem Antrieb für zwei Räder, dadurch gekennzeichnet, daß jedes angetriebene Rad (1) mit seinem Antrieb (2) gegenüber dem Stuhlgestell (3) separat abgefedert ist.1. Wheelchair for the disabled and sick with an electric motor drive for two wheels, characterized in that each driven wheel (1) with its drive (2) relative to the chair frame (3) is cushioned separately. 2. Rollstuhl nach Anspruch 1, dadurch gekennzeichnet, daß als Federung (4) für jedes angetriebene Rad (1) eine Teleskopfeder in Form einer Gasdruckfeder, eines Stoßdämpfers od. dgl., vorgesehen ist.2. Wheelchair according to claim 1, characterized in that a telescopic spring in the form of a gas pressure spring, a shock absorber or the like is provided as the suspension (4) for each driven wheel (1). 3. Rollstuhl nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Feder (4) mit einem Ende in einem Gelenk des auf der Radachse (6) sitzenden Antriebes (2) und mit seinem anderen Ende in einem Gelenk (7) am Stuhlgestell (3) festgelegt ist.3. Wheelchair according to claims 1 and 2, characterized in that the spring (4) with one end in a joint of the on the wheel axle (6) seated drive (2) and with its other end in a joint (7) on the chair frame (3) is set. 4. Rollstuhl nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die beiden Hinterräder (1) ange­trieben und gegenüber dem Stuhlgestell (3) abgefedert sind.4. Wheelchair according to claims 1 to 3, characterized in that the two rear wheels (1) are driven and cushioned relative to the chair frame (3). 5. Rollstuhl nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die beiden Antriebe (2) über Kugelgelenkstangen (8) mit dem Stuhlgestell (3) beweglich verbunden sind.5. Wheelchair according to claims 1 to 4, characterized in that the two drives (2) via ball joint rods (8) with the chair frame (3) are movably connected.
EP89107186A 1988-04-28 1989-04-21 Wheel chair Revoked EP0339500B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107186T ATE86093T1 (en) 1988-04-28 1989-04-21 WHEELCHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8805610U DE8805610U1 (en) 1988-04-28 1988-04-28 wheelchair
DE8805610U 1988-04-28

Publications (3)

Publication Number Publication Date
EP0339500A2 true EP0339500A2 (en) 1989-11-02
EP0339500A3 EP0339500A3 (en) 1990-02-14
EP0339500B1 EP0339500B1 (en) 1993-03-03

Family

ID=6823460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107186A Revoked EP0339500B1 (en) 1988-04-28 1989-04-21 Wheel chair

Country Status (4)

Country Link
EP (1) EP0339500B1 (en)
AT (1) ATE86093T1 (en)
DE (2) DE8805610U1 (en)
ES (1) ES2037901T3 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412133A1 (en) * 1988-11-17 1991-02-13 Invacare Corp Powered wheelchair having transversely mounted drive mechanism.
US5180025A (en) * 1991-12-13 1993-01-19 Yeh Bean Shung Wheeled-chair chassis with a suspension mechanism
FR2685866A1 (en) * 1992-01-03 1993-07-09 Cophignon Jacques Mounting of shock-absorbers for wheelchairs for the handicapped
WO1994015567A1 (en) * 1993-01-13 1994-07-21 Ligtvoet Products B.V. Wheelchair
EP0688552A1 (en) 1994-06-15 1995-12-27 Invacare (Deutschland) GmbH Wheel chair
US5518081A (en) * 1993-07-15 1996-05-21 Thibodeau; Bryan H. All-terrain, all-weather wheelchair
US5564512A (en) * 1992-12-17 1996-10-15 Richard Van Seenus Nederland B.V. Wheelchair
US5575348A (en) * 1994-04-15 1996-11-19 Invacare Corporation Powered wheelchair with adjustable center of gravity and independent suspension
CN105496668A (en) * 2014-09-26 2016-04-20 广东凯洋医疗科技集团有限公司 Hub fast clutch device for electric wheelchair
US9603762B2 (en) 2007-02-08 2017-03-28 Invacare Corporation Wheelchair suspension
US9700470B2 (en) 2012-02-15 2017-07-11 Invacare Corporation Wheelchair suspension
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
US9987177B2 (en) 2000-10-27 2018-06-05 Invacare Corporation Obstacle traversing wheelchair
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
US11903887B2 (en) 2020-02-25 2024-02-20 Invacare Corporation Wheelchair and suspension systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19932109C1 (en) * 1999-07-09 2000-08-24 Invacare Deutschland Gmbh Spring suspension for a wheelchair has a spring joint to support the wheel or wheel structure with a spring unit over the wheel axis which can be fitted to folding wheelchairs
US7040429B2 (en) 2001-10-10 2006-05-09 Invacare Corporation Wheelchair suspension

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2110269A1 (en) * 1971-03-04 1972-10-26 Fa. Wilhelm Meyer, 4973 Vlotho Portable ambulance chair /
US4190263A (en) * 1978-05-22 1980-02-26 Albuquerque Patents, Ltd. Wheelchair with shock absorber
DE3414204A1 (en) * 1984-04-14 1985-10-24 Horst 4970 Bad Oeynhausen Lindenkamp Small vehicle, in particular for disabled persons

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2110269A1 (en) * 1971-03-04 1972-10-26 Fa. Wilhelm Meyer, 4973 Vlotho Portable ambulance chair /
US4190263A (en) * 1978-05-22 1980-02-26 Albuquerque Patents, Ltd. Wheelchair with shock absorber
DE3414204A1 (en) * 1984-04-14 1985-10-24 Horst 4970 Bad Oeynhausen Lindenkamp Small vehicle, in particular for disabled persons

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412133A1 (en) * 1988-11-17 1991-02-13 Invacare Corp Powered wheelchair having transversely mounted drive mechanism.
EP0412133A4 (en) * 1988-11-17 1991-06-19 Invacare Corporation Powered wheelchair having transversely mounted drive mechanism
US5180025A (en) * 1991-12-13 1993-01-19 Yeh Bean Shung Wheeled-chair chassis with a suspension mechanism
FR2685866A1 (en) * 1992-01-03 1993-07-09 Cophignon Jacques Mounting of shock-absorbers for wheelchairs for the handicapped
US5564512A (en) * 1992-12-17 1996-10-15 Richard Van Seenus Nederland B.V. Wheelchair
WO1994015567A1 (en) * 1993-01-13 1994-07-21 Ligtvoet Products B.V. Wheelchair
US5518081A (en) * 1993-07-15 1996-05-21 Thibodeau; Bryan H. All-terrain, all-weather wheelchair
US5575348A (en) * 1994-04-15 1996-11-19 Invacare Corporation Powered wheelchair with adjustable center of gravity and independent suspension
US5853059A (en) * 1994-04-15 1998-12-29 Invacare Corporation Powered wheelchair with adjustable center of gravity and independent suspension
US5540297A (en) * 1994-06-15 1996-07-30 Invacare (Deutschland) Gmbh Two-motor wheelchair with battery space
EP0688552A1 (en) 1994-06-15 1995-12-27 Invacare (Deutschland) GmbH Wheel chair
DE4420877C2 (en) * 1994-06-15 2001-09-20 Invacare Deutschland Gmbh wheelchair
US9987177B2 (en) 2000-10-27 2018-06-05 Invacare Corporation Obstacle traversing wheelchair
US9925100B2 (en) 2002-10-25 2018-03-27 Invacare Corporation Suspension for wheeled vehicles
US10512572B2 (en) 2002-10-25 2019-12-24 Invacare Corporation Suspension for wheeled vehicles
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
US10912690B2 (en) 2007-02-08 2021-02-09 Invacare Corporation Wheelchair suspension
US11464687B2 (en) 2007-02-08 2022-10-11 Invacare Coporation Wheelchair suspension
US10265229B2 (en) 2007-02-08 2019-04-23 Invacare Corporation Wheelchair suspension
US11819464B2 (en) 2007-02-08 2023-11-21 Invacare Corporation Wheelchair suspension
US9603762B2 (en) 2007-02-08 2017-03-28 Invacare Corporation Wheelchair suspension
US11097589B2 (en) 2007-02-14 2021-08-24 Invacare Corporation Stability control system
US9827823B2 (en) 2007-02-14 2017-11-28 Invacare Corporation Stability control system
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
US11096845B2 (en) 2009-10-09 2021-08-24 Invacare Corporation Wheelchair suspension
US11857470B2 (en) 2009-10-09 2024-01-02 Invacare Corporation Wheelchair suspension
US9700470B2 (en) 2012-02-15 2017-07-11 Invacare Corporation Wheelchair suspension
US11234875B2 (en) 2012-02-15 2022-02-01 Invacare Corporation Wheelchair suspension
US10434019B2 (en) 2012-02-15 2019-10-08 Invacare Corporation Wheelchair suspension
CN105496668A (en) * 2014-09-26 2016-04-20 广东凯洋医疗科技集团有限公司 Hub fast clutch device for electric wheelchair
US11903887B2 (en) 2020-02-25 2024-02-20 Invacare Corporation Wheelchair and suspension systems

Also Published As

Publication number Publication date
DE58903629D1 (en) 1993-04-08
ATE86093T1 (en) 1993-03-15
ES2037901T3 (en) 1993-07-01
EP0339500A3 (en) 1990-02-14
DE8805610U1 (en) 1988-07-07
EP0339500B1 (en) 1993-03-03

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