EP2821046A2 - Stützradanordnung für Rollstühle - Google Patents

Stützradanordnung für Rollstühle Download PDF

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Publication number
EP2821046A2
EP2821046A2 EP14175572.8A EP14175572A EP2821046A2 EP 2821046 A2 EP2821046 A2 EP 2821046A2 EP 14175572 A EP14175572 A EP 14175572A EP 2821046 A2 EP2821046 A2 EP 2821046A2
Authority
EP
European Patent Office
Prior art keywords
arm
chair
support wheel
wheel
cable
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Withdrawn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
EP14175572.8A
Other languages
English (en)
French (fr)
Other versions
EP2821046A3 (de
Inventor
Jan Braseth
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.)
Etac As
Original Assignee
Etac As
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 Etac As filed Critical Etac As
Publication of EP2821046A2 publication Critical patent/EP2821046A2/de
Publication of EP2821046A3 publication Critical patent/EP2821046A3/de
Withdrawn legal-status Critical Current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
    • A61G5/06—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
    • A61G5/063—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 with eccentrically mounted wheels
    • 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
    • A61G5/04—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

Definitions

  • the present invention relates to a support wheel assembly for wheel-chairs.
  • the assembly according to the invention includes a support wheel which is mounted on an arm.
  • the arm is mounted with a small angle relative the vertical direction of the wheel-chair whereupon the arm will become parallel with a normal force from a support in case the chair is tilting.
  • the arm includes a first part and a second part, the first part and the second part being hinged together.
  • the hinging is spring loaded.
  • the first and second part are adapted to lock together if influenced by a force in the longitudinal direction of the arm and bend back if influenced by a force in the transverse direction of the arm.
  • the first part includes a first end with means for attaching the part to the chassis and a second end with a cup-shaped depression.
  • the second part includes a first end which is attached to the support wheel and a second end that is shaped correspondingly to the second end of the first part.
  • the arm further includes a spring assembly elastically holding the first part together with the second part.
  • Said spring assembly may be realized in several ways, but according to a preferred embodiment this includes a flexible cable with a first end that is attached to a ball and a second end that is adjustably attached to a disc. Further, there is a helical spring surrounding the cable, the cable is jointed to the second part by this gripping around the ball and the second end of the cable being attached to the disc, so that the spring is pre-stressed between an internal flange in the first part and the disc. The disc moves freely inside the first part.
  • the tensioning of the spring may easily be adjusted by changing the position of the disc on the cable, e.g. by tensioning a nut at the end of the cable.
  • Fig. 1 shows a wheel-chair with the maximum allowable tilt angle ⁇ indicated.
  • the line A shows the possible position of the underside of the support wheel if the tilting of the chair is to be limited to this angle ⁇ . If the chair is to pass a pavement edge B or another sharp obstacle of the same height, the support wheel must be located in position C. The support wheels will then project far from the chair, to significant nuisance for both the user and other persons nearby. If the support wheels are mounted nearer the chair, e.g. in position D, the support wheels must be lowered to obtain the same tilt-limiting angle ⁇ . However, with such a low location of the support wheels, it is impossible to pass the pavement edge, as the wheels will hit the edge.
  • Fig. 2 shows the chassis of an electric wheel-chair equipped with support wheel assemblies according to the invention.
  • the wheels are mounted much closer to the wheel-chair than what is usual, but it is nevertheless fully possible to pass pavement edges and other sharp obstacles of normal height.
  • the solution according to the invention is to mount each support wheel on a hinged arm. If the wheel-chair should tilt backwards or forwards, the support wheels will touch the ground whereupon a pressure is applied onto the arm in its longitudinal (vertical) direction, as shown in the detailed drawing in Fig. 4 . The arm will then lock. The support wheels will therefore act as intended and stabilize the chair.
  • Fig. 5 it is shown how the support wheel also may bend sideways. This function is desirable, to prevent becoming stuck when turning the chair hitting obstacles at the side of the chair.
  • Fig. 6 shows the arm and support wheel in cross section.
  • the arm includes two hollow parts 2, 3 which are hinged to each other.
  • the first (upper) part 2 has mounting ears 4 in its first end for fastening the arm to the chair.
  • the first part has a rounded or cup-shaped depression 5 designed to receive a correspondingly rounded first end 6 of the other part 3.
  • the other end of the second part 3 is fastened to the support wheel 7.
  • the cup-shaped depression 5 in the first part may include an elastic material, e.g. as a lining, allowing some compression of the hinge if loaded vertically.
  • the first part 2 is hinged to the second part 3.
  • the hinging may include a flexible wire or cable 8.
  • the cable may be replaced with a bolt, but it is preferred to use a cable to provide some additional flexibility to the hinge.
  • the cable is located inside the hollow parts, and is in one end terminated in a ball 9 which is held inside the second part 3.
  • the second part 3 is folded around the ball 9 and thus gripping the ball 9 and the cable 8 preventing them from being pulled from the part.
  • the cable 8 passes through the cavity in the first part 2 and is surrounded by a spring 10.
  • One end of the spring 10 rests on a flange 11 inside the first part 2. In the other end it abuts against a disc 12 fastened to the second end of the cable 8.
  • the disc 12 may slide freely inside the first part 2 and may be regulated relative the cable 8 providing a proper pre-stress (compression) to the spring.
  • the second part 3 will be pressed into the first part 2 and hit the flat lower end of the first part. The hinging will become stuck or locked with the arm in a linear configuration. If loaded transverse to the longitudinal direction of the arm, the second part 3 will become disengaged from the first part 2 and retract.

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)
  • Seats For Vehicles (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)
  • Braking Arrangements (AREA)
EP14175572.8A 2013-07-03 2014-07-03 Stützradanordnung für Rollstühle Withdrawn EP2821046A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20130931A NO337160B1 (no) 2013-07-03 2013-07-03 Støttehjulsammenstilling

Publications (2)

Publication Number Publication Date
EP2821046A2 true EP2821046A2 (de) 2015-01-07
EP2821046A3 EP2821046A3 (de) 2015-02-18

Family

ID=51205190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14175572.8A Withdrawn EP2821046A3 (de) 2013-07-03 2014-07-03 Stützradanordnung für Rollstühle

Country Status (2)

Country Link
EP (1) EP2821046A3 (de)
NO (1) NO337160B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106166920A (zh) * 2016-09-27 2016-11-30 苏州捷赛机械股份有限公司 一种支撑轮组件
CN110063847A (zh) * 2018-01-24 2019-07-30 纬创资通股份有限公司 移动载具
EP3538381A4 (de) * 2016-11-10 2020-07-29 Exokinetics, Inc. Dualstatuslaufrollen und verfahren
US11648922B2 (en) * 2015-09-02 2023-05-16 Evolution Technologies Inc. Manually-operated, height-adjustable wheeled vehicle, and a brake assembly and wheel fork assembly thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000912A (en) * 1975-02-21 1977-01-04 Mse Corporation Shock absorber
US6041876A (en) * 1997-10-06 2000-03-28 Invacare Corporation Anti-tip assembly for power wheelchair
US6460641B1 (en) * 2000-06-29 2002-10-08 Invacare Corporation Mid-wheel drive wheelchair with front wheel multiple bias suspension and anti-tip assembly
US7219924B2 (en) * 2002-04-30 2007-05-22 Pride Mobility Products Corporation Rear wheel drive power wheelchair with ground-contacting anti-tip wheels
US7231689B2 (en) * 2002-06-05 2007-06-19 Sunrise Medical Hhg Inc. Adjustable wheel assembly
FR2887143B1 (fr) * 2005-06-17 2008-07-04 Bernard Alphonse Meda Dejonghe Equipement pour fauteuil roulant et fauteuil roulant muni d'un tel equipement
US7455309B2 (en) * 2006-09-18 2008-11-25 Meyrav Dror Automatically engaging safety device for a wheelchair or other medical device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11648922B2 (en) * 2015-09-02 2023-05-16 Evolution Technologies Inc. Manually-operated, height-adjustable wheeled vehicle, and a brake assembly and wheel fork assembly thereof
CN106166920A (zh) * 2016-09-27 2016-11-30 苏州捷赛机械股份有限公司 一种支撑轮组件
EP3538381A4 (de) * 2016-11-10 2020-07-29 Exokinetics, Inc. Dualstatuslaufrollen und verfahren
US11685188B2 (en) 2016-11-10 2023-06-27 Exokinetics, Inc. Dual-state caster and method
CN110063847A (zh) * 2018-01-24 2019-07-30 纬创资通股份有限公司 移动载具

Also Published As

Publication number Publication date
NO337160B1 (no) 2016-02-01
EP2821046A3 (de) 2015-02-18
NO20130931A1 (no) 2015-01-05

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