EP1151737A2 - Fauteuil roulant et châssis pour un fauteuil roulant - Google Patents

Fauteuil roulant et châssis pour un fauteuil roulant Download PDF

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Publication number
EP1151737A2
EP1151737A2 EP01201584A EP01201584A EP1151737A2 EP 1151737 A2 EP1151737 A2 EP 1151737A2 EP 01201584 A EP01201584 A EP 01201584A EP 01201584 A EP01201584 A EP 01201584A EP 1151737 A2 EP1151737 A2 EP 1151737A2
Authority
EP
European Patent Office
Prior art keywords
arms
connecting arm
spring
wheelchair
wheelchair according
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.)
Withdrawn
Application number
EP01201584A
Other languages
German (de)
English (en)
Other versions
EP1151737A3 (fr
Inventor
Frank Van Houten
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.)
Movingpeoplenet International Bv
Original Assignee
Movingpeoplenet International Bv
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 Movingpeoplenet International Bv filed Critical Movingpeoplenet International Bv
Publication of EP1151737A2 publication Critical patent/EP1151737A2/fr
Publication of EP1151737A3 publication Critical patent/EP1151737A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • A61G5/042—Front 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

Definitions

  • the invention relates to a wheelchair, provided with an undercarriage comprising two bearing arms which extend parallel to each other and near at least one end thereof are each provided with a rotatable wheel, which bearing arms are connected, in a manner rotatable about an axis running crosswise to the bearing arms, to a first carriage part connected to the chair, and the bearing arms are interconnected at a distance from the first carriage part, and the wheels are movable vertically under spring tension relative to the carriage.
  • the invention also relates to an undercarriage for such a wheelchair.
  • a chair, in which a user can sit, can be mounted on this undercarriage.
  • Such a wheelchair is known from Dutch Patent NL-1002601.
  • the two bearing arms are connected to each other by way of a leaf spring, the leaf spring also being connected in the centre to a rigid part of the undercarriage.
  • the leaf spring can come loose during travel, with the result that all comfort is lost.
  • the leaf spring comes loose mainly during jerky movement of the wheelchair, for example when coming down from a kerb.
  • the invention provides a wheelchair in the case of which uneven surfaces are handled well without the abovementioned disadvantages.
  • the wheelchair is characterized in that the wheels are interconnected by a first, substantially rigid connecting arm, which is connected to the two bearing arms in a vertically pivoting manner, which connecting arm, with the interposition of at least one spring element, interacts in a pivoting manner with the abovementioned first carriage part, or with a second carriage part rigidly connected to the abovementioned first carriage part.
  • a rigid connecting arm between the bearing arms causes virtually no torsion near its fixing to the bearing arms, so that the abovementioned problem of coming loose is avoided.
  • the connecting arm is connected by way of a spring element to the carriage, and in this case it has been found that the uneven surfaces are handled even better than is the case with the wheelchair from the prior art.
  • FIG 1 shows an undercarriage 1 of a wheelchair, the chair of which, for the sake of clarity, is not shown.
  • the undercarriage 1 comprises two arms 2, which extend parallel to each other and near each end are provided with a driven wheel 3.
  • the wheels 3 are mounted in bearings 4 in such a way that they are rotatable relative to the arms.
  • Swivelling wheels 19 are mounted on the other end of the two arms 2.
  • the arms 2 are interconnected by means of a crossbar 5, which extends crosswise to the arms 2, each arm 2 being fixed in a pivoting manner to an end 6 of the crossbar 5, and being capable of pivoting relative to the crossbar 5 about an axis 7 running crosswise to the arms in a direction indicated by arrow P1.
  • a chair (not shown) can be fixed on the crossbar 5.
  • This fixing can be a rigid connection, but the chair can also be fixed to the crossbar 5, or to another part rigidly connected to the crossbar, with the interposition of spring elements.
  • a second carriage part, battery container 8, is rigidly fixed to the crossbar 5.
  • a battery can be accommodated in the battery container 8, for powering an electric motor, by means of which the wheels 3 can be driven.
  • the battery container 8 extends from the crossbar 5 to beyond two wheels 3 situated opposite each other.
  • a rigid connecting arm 11, which extends substantially parallel to the crossbar 5, is fixed between ends 10 of the arms 2.
  • the connecting arm 11 is connected to the two arms 2 in a vertically pivoting manner by means of pivots 14.
  • a coil spring 13 is provided in the centre of connecting arm 11, which coil spring is accommodated in a tight fit between arm 11 and a spring accommodation element 15, which is rigidly connected to a raised part 17 of edge 9 of the battery container 8. It is also possible for the ends of spring 15 to be fixed to element 15 and arm 11 respectively.
  • Spring accommodation element 15 may, if desired, be fixed rotatably on edge 9, parallel to the face of edge 9.
  • a coil spring is provided in the instance illustrated, other spring elements may also be used, such as, for example, a gas spring.
  • the bearing arms 2, just as in the exemplary embodiment of Figure 1 are connected by a first connecting arm 11, but are also connected by a second, rigid connecting arm 16 running substantially parallel to connecting arm 11.
  • a spring element 13 is provided in the centre of arm 11, which spring element is accommodated in a tight fit between spring accommodation element 15 and arm 11.
  • Spring 13 interacts with spring accommodation element 15, which is rigidly connected to the raised part 17 of the edge 9 of battery container 8.
  • a rotatable connection between spring accommodation element 15 and the battery container is also possible.
  • a shock-absorbing element 20 made of a resilient material such as rubber, is fixed on spring accommodation element 15, on which shock-absorbing element arm 16 rests.
  • Spring 13 thus rests on bar 9, and spring accommodation element 15, and consequently battery container 8, rests on spring 13.
  • Bar 16 rests on shock-absorbing element 20.
  • Connecting arm 11 is connected to bearing arms 2 by way of pivots 14, just as in Figure 1.
  • Bearing arm 16 is connected to the two bearing arms 2 by way of pivots 18.
  • the undercarriage 1 works as follows.
  • the right wheel 3 of right bearing arm 2 moves in a direction indicated by arrow P3
  • the left wheel 3 of the other bearing arm 2 situated opposite moves in a direction indicated by arrow P4, in the opposite direction to that of the arrow P3, in which process the crossbar 5 pivots about axis 7 in the direction indicated by arrow P1.
  • the arms 2 in this case are moved in opposite directions to each other about axis 7.
  • connecting arm 11 and, if present, connecting arm 16 will spring in or spring out relative to connecting point 15, connecting point 15 also acting as a pivot point.
  • spring 13 can deform slightly, in other words it can describe a slightly arcuate movement in one plane, parallel to that of edge 9.
  • FIG. 4A shows another undercarriage according to the invention.
  • Bearing arms 42 are connected to a rigid first carriage part, battery container 48.
  • Bars 46, on which swivelling wheels 43 are mounted, are rigidly fixed to battery container 48.
  • Bearing arms 42 are rotatably mounted at the position of 47, along wall 49 of battery container 48.
  • Ends 50 of bearing arms 42 are connected to driven wheels 51, only one of which is shown in the case illustrated. The drive is not shown.
  • the bearing arms 42 are connected by way of substantially vertically extending rods 52 to a rigid connecting arm 53.
  • Connecting arm 53 is connected to a downwardly extending V-shaped bracket 57, which is flattened off on the underside.
  • a spring accommodation element 55 is fixed to the rear wall 56 of battery container 48.
  • a spring 54 is accommodated in a tight fit between spring accommodation element 55 and the flat underside of bracket 57.
  • the ends of spring 54 can also be fixed to bracket 57 and spring accommodation element 55 respectively.
  • Figure 6 shows an embodiment with two connecting arms 53 and 60, the carriage otherwise being substantially the same as that of Figure 4A.
  • This embodiment is characterized by the presence of two connecting arms 53 and 60, connected to each other by substantially vertically extending rods 62.
  • Spring 54 is wedged between spring accommodation element 55 and the centre of connecting arm 60, while the ends of the spring 54 can also be fixed to the element 55 and/or arm 60 respectively.
  • Spring accommodation element 55 is fixed to rear wall 56 of battery container 48.
  • a shock-absorbing element 58 on which arm 53 rests in a shock-absorbing manner, is fitted on the spring accommodation element 55.
  • the advantage of two connecting arms lies in obtaining increased firmness and stability during travel over uneven surfaces.
  • the wheels can be fixed on the end of bearing arms 42, but can also be fixed to rods 62.
  • the functioning during travel over an uneven surface is illustrated in Figure 6B, in the case of which the same happens as is described in the case of Figure 4B.
  • Figures 7a and 7b show a rear view of the carriage according to Figures 6A and 6B, in this case a chair 68 with seat 69 also being shown.
  • the carriage can also be provided with only one swivelling wheel.
  • swivelling wheels instead of swivelling wheels, other types of controlling wheels may be fitted.

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)
EP01201584A 2000-05-01 2001-05-01 Fauteuil roulant et châssis pour un fauteuil roulant Withdrawn EP1151737A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1015070 2000-05-01
NL1015070A NL1015070C2 (nl) 2000-05-01 2000-05-01 Rolstoel en onderstel voor een rolstoel.

Publications (2)

Publication Number Publication Date
EP1151737A2 true EP1151737A2 (fr) 2001-11-07
EP1151737A3 EP1151737A3 (fr) 2002-05-08

Family

ID=19771290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01201584A Withdrawn EP1151737A3 (fr) 2000-05-01 2001-05-01 Fauteuil roulant et châssis pour un fauteuil roulant

Country Status (2)

Country Link
EP (1) EP1151737A3 (fr)
NL (1) NL1015070C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022146145A1 (fr) * 2020-12-29 2022-07-07 Whanauka Limited Fauteuil roulant amélioré
WO2024005654A3 (fr) * 2022-06-29 2024-02-01 Whanauka Limited Fauteuil roulant amélioré et dispositif de siège amélioré

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1575354A (en) * 1978-05-19 1980-09-17 Spastics Soc Chassis for wheelchairs
WO1996014217A1 (fr) * 1994-11-08 1996-05-17 Lendal Pty. Ltd. Chassis mobile
NL1002601C2 (en) * 1995-03-13 1996-09-18 Mattheus Caspar Maria Meulendi Wheelchair for travelling over roads with bumps - has undercarriage having two parallel arms having rotatable wheels near their ends which are pivotally interconnected by cross-beam
NL1012764C1 (nl) * 1999-08-02 1999-09-14 Tripuck Bv Constructie dienende als onderstel en wielophanging voor elektrisch voortbewogen vervoersmiddelen.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1575354A (en) * 1978-05-19 1980-09-17 Spastics Soc Chassis for wheelchairs
WO1996014217A1 (fr) * 1994-11-08 1996-05-17 Lendal Pty. Ltd. Chassis mobile
NL1002601C2 (en) * 1995-03-13 1996-09-18 Mattheus Caspar Maria Meulendi Wheelchair for travelling over roads with bumps - has undercarriage having two parallel arms having rotatable wheels near their ends which are pivotally interconnected by cross-beam
NL1012764C1 (nl) * 1999-08-02 1999-09-14 Tripuck Bv Constructie dienende als onderstel en wielophanging voor elektrisch voortbewogen vervoersmiddelen.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022146145A1 (fr) * 2020-12-29 2022-07-07 Whanauka Limited Fauteuil roulant amélioré
GB2618254A (en) * 2020-12-29 2023-11-01 Whanauka Ltd An improved wheelchair
WO2024005654A3 (fr) * 2022-06-29 2024-02-01 Whanauka Limited Fauteuil roulant amélioré et dispositif de siège amélioré

Also Published As

Publication number Publication date
EP1151737A3 (fr) 2002-05-08
NL1015070C2 (nl) 2001-11-02

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