EP1762210A1 - Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl - Google Patents

Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl Download PDF

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Publication number
EP1762210A1
EP1762210A1 EP05405531A EP05405531A EP1762210A1 EP 1762210 A1 EP1762210 A1 EP 1762210A1 EP 05405531 A EP05405531 A EP 05405531A EP 05405531 A EP05405531 A EP 05405531A EP 1762210 A1 EP1762210 A1 EP 1762210A1
Authority
EP
European Patent Office
Prior art keywords
braces
frame
wheelchair
pair
articulated
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Withdrawn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
EP05405531A
Other languages
English (en)
French (fr)
Inventor
Wilfrid Da Cunha
Christian Jouannet
Thierry Crespin
Jean-Michel Roncin
Laurent Derche
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.)
Invacare International SARL
Original Assignee
Invacare International SARL
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 Invacare International SARL filed Critical Invacare International SARL
Priority to EP05405531A priority Critical patent/EP1762210A1/de
Priority to PCT/IB2006/052936 priority patent/WO2007029131A1/fr
Priority to EP06795761.3A priority patent/EP1931295B1/de
Publication of EP1762210A1 publication Critical patent/EP1762210A1/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Withdrawn legal-status Critical Current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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
    • 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
    • A61G5/0816—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
    • A61G5/0825—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1062—Arrangements for adjusting the seat adjusting the width of the seat

Definitions

  • the majority of folding wheelchairs that are known generally comprise a frame with one or more pairs of braces articulated on one another forming a parallelogram system deformable in a vertical plane.
  • This kind of chairs has several disadvantages.
  • the size of the braces which depending on the size of the chair protrude above the level of the armrests, prevents the folding of the backrest, which does not facilitate the transport of the chair and requires packaging of big size.
  • the difficulties of operating the chassis constitute an obstacle to its use in certain circumstances.
  • this type of frame does not allow its sides to remain parallel.
  • the flanks are found parallel at the end of folding, they are not during folding, which implies a tension of the backrest lining and a hard spot during the folding or unfolding phases of the chair.
  • This type of deformable parallelogram chassis comprises moving parts, some of which are only occasionally in contact with each other. The contacting of these parts during closing or opening movements of the chair can sometimes cause rapid wear or deterioration of the object, whose life can be shortened. In addition, it is not possible to design a production of standardized chassis, usable indifferently for different widths of chair.
  • the object of the present invention is to design a principle of realization of foldable wheelchairs frame allowing the manufacture and the marketing of foldable wheelchairs not having the defects mentioned above.
  • the present invention relates to a foldable wheelchair frame as defined in claim 1. It also relates to a foldable wheelchair as defined in claim 6.
  • the simplified chassis shown in FIGS. 1 to 3 is a robust and rigid construction using prefabricated elements easy to work.
  • Each of the flanks 1 and 2 consists of rigid bars, for example metal, especially steel or light metal tubes preferably assembled by welding, although other known assembly methods can also be envisaged.
  • the upper 3 and lower 4 bars of each side are rigidly connected to the front and rear uprights 5, 6, and intended to work in a horizontal position.
  • the rear uprights 6 serve as guiding bushings or connecting yokes 7 pivoting on them and each of which is fixed the rear end of a spider 8 whose front end is secured to a movable sliding linkage 9 along the other side.
  • the braces 8 and their connection devices with socket 7 at one end and 9 at the other end represent an essential part of the frame described.
  • Each upright 9 is connected, at its upper and lower ends, by pivoting articulations of vertical axis with two slides 10 and 11 being able to move along the upper and lower bars 4 of the sidewalls 1 and 2.
  • the assembly is such that the braces 8 pass one above the other. They are preferably connected by a pivoting device 12 of vertical axis as shown in FIGS. 1 and 2, the latter representing the chassis in the semi-folded position, while FIG. 3 shows a fully folded position reachable by an adequate conformation of the device 12, for example with extractable pivot rod.
  • the slides 10, 11 are not necessarily tubular, they can also be trough-shaped. It is also noted that the device 12 can be arranged externally to the bars or tubes of the braces 8, which avoids weakening their rigidity by holes.
  • FIGS. 4 to 6 The use of the frame of FIGS. 1 to 3 for the construction of a wheelchair is illustrated in FIGS. 4 to 6.
  • the structural elements 3, 4, 5 and 6 of the flanks 1 and 2 and the connecting uprights 9 of the crosspieces 8 are recognized.
  • a security locking device of the seat plate in the locked position can be added.
  • the longitudinal joint may take the form of a system of hinges placed under the elements of the seat plate.
  • the armrests 14 and the side walls 15 are rigidly fixed to the bars 3 while the two parallel handles 16 are mounted at the rear end of the bars 3 beyond the uprights 6, so as to allow their folding in the folded or unfolded position. Between the risers of the handles 16, one can naturally provide the installation of a flexible backrest, for example textile, or rigid with a possibility of folding when the wheelchair in the folded position.
  • the steerable front wheels 17 and the rear carrying wheels 18 are mounted via their hubs on brackets 19 and 20 which are attached to appropriate elements integral with the frames of the sidewalls 1 and 2. It can be seen that the consoles 19 of the front wheels have forks pivoting on vertical axes at the front of the uprights 5.
  • a footrest 21 is further provided on each side 1 and 2 so as to fold forward of the wheels 17 when the chair is in the unfolded position (Fig 4).
  • Figs. 7 and 8 also illustrate a construction of a wheelchair with two rear carrying wheels 22 and two steerable front wheels 23.
  • the carrying frame of this chair is of a simpler and lighter design than in the first form of execution while allowing the same applications.
  • This frame designated generally by 24, comprises two sidewalls each formed with a single structural element in the form of a horizontal rigid bar 25. The latter has, at the rear end, a pivoting articulation of vertical axis for a rear end of a spider 27 and, at the front end, an upright 28 rigidly connected to the bar 25, oriented vertically and guiding one of the steerable front wheels 23.
  • a second rigid upright 29 is disposed at a predetermined location of the length of the bar 25.
  • each bar 25 carries a sliding connection 31 which can be of the same type as the slides 10 and 11 and on which pivots one end of a cross 34 constituting the second cross of the pair ensuring the operation of the frame.
  • the braces 27 and 34 thus pivot on the pivot links 26 at the rear ends of the flanks 25 of the frame. They are articulated one on the other by a pivoting connection 33 similar to the link 12 of the first embodiment so that the unfolding and the folding of the chassis are carried out without difficulty and gradually, the two sides being guided while remaining parallel to each other and the links 31 sliding on the bars 25.
  • the uprights 29 carry at their lower end consoles with the axles 30 of the wheels 22.
  • Fig. 8 shows the chair in a semi-folded position. The transition from the unfolded position to the semi-folded position being very easy, this intermediate position can be used momentarily while the occupant remains seated, for example to cross a narrow passage.
  • FIG. 9 A heavier and more massive embodiment of the frame according to the invention is shown in FIG. 9.
  • the two sides 35 each formed of a rectangular frame are connected by two pairs of braces 36, 37 and 38, 39 intersecting on the same axis, at a distance from each other, each pair of braces being mounted on a pivot axis 40, 41.
  • the common axis of the two pairs of braces is always located in the middle between the flanks and parallel to their planes.
  • the distance between the two pairs of braces may be greater or less depending on the desired performance for the chair.
  • the two parallel flanks 35 comprise, as in the embodiments already described, auxiliary elements for mounting two steerable front wheels and two load wheels (not shown).
  • the folding system uses here the two pairs of braces 36, 37 and 38, 39 whose pivot axes 40 and 41 are superimposed.
  • Amounts 42, 43 and 44, 45 are rigidly fixed to the ends of the crosspieces so that the entire system forms two rigid frames intersecting on the pivot axis 40, 41.
  • one of the uprights forms the sliding connection device of the frame on the bars respectively upper and lower of a side while the other upright is a pivoting joint, using a socket or clevis on the rear pillar of the other side.
  • Fig. 9 also shows that the two uprights 43 and 44 carry halfway up the outer elements in the form of rotating handles 46, 47. They represent the control of a locking means of the sliding connections of the pairs of braces on the upper and lower bars flanks.
  • the frames of the various exemplary embodiments can be equipped with locking systems as desired in the example of FIG. 9.
  • the two flanks 48 and 49 of the frame of FIG. 10 whose structure is similar to that of the first embodiment with a single pair of braces, are connected to the front of the frame by an articulated structure formed of two links 50, 51, hinged at one end on the uprights front of each of the flanks 48, 49 and at the other end to one another so as to form a compass, so that in the semi-folded or fully folded position of the frame, the compass is open while in unfolded position the two rods are locked in the extension of one another.
  • This system which can be doubled at the rear of the chair, supports the seat 52.
  • the backrest 53 is also shown in FIG. 10.
  • the rod system shown in FIG. 10 could be replaced by a system with several rods bracing each other keystone.
  • a lever control would then allow the user to modify himself the width of the chair.
  • the bracing elements could have a certain thickness and be connected by a flexible band.
  • FIG. 11 Another embodiment of a locking system is schematically shown in FIG. 11.
  • a frame similar to that of fig. 1 comprises two parallel flanks 54 and 55 connected by two braces 56, 57 articulated on a central pivot 58.
  • the sliding connections 59 and 60 allowing the mobile ends of the braces to move along the sidewalls 54 and 55 are subjected to a stress of limitation of their movements by a system of articulated links 61, 62 whose operation is clear from FIG. 11.
  • the links 61, 62 are tensioned and any subsequent movement of the slides is prohibited until the beginning of a folding of the frame.
  • the rods 61, 62 have been shown only on the sidewall 54, this locking system could also be mounted on both sidewalls 54 and 55.
  • the design of the articulated frame articulated around vertical axes allows the realization of chassis standardized for different widths of armchairs.

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)
EP05405531A 2005-09-08 2005-09-08 Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl Withdrawn EP1762210A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05405531A EP1762210A1 (de) 2005-09-08 2005-09-08 Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl
PCT/IB2006/052936 WO2007029131A1 (fr) 2005-09-08 2006-08-24 Chassis de fauteuil roulant pliable et fauteuil roulant pliable
EP06795761.3A EP1931295B1 (de) 2005-09-08 2006-08-24 Faltbares Rollstuhl-Fahrgestell und faltbarer Rollstuhl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05405531A EP1762210A1 (de) 2005-09-08 2005-09-08 Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl

Publications (1)

Publication Number Publication Date
EP1762210A1 true EP1762210A1 (de) 2007-03-14

Family

ID=35734938

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05405531A Withdrawn EP1762210A1 (de) 2005-09-08 2005-09-08 Faltbarer Rollstuhlrahmen und faltbarer Rollstuhl
EP06795761.3A Active EP1931295B1 (de) 2005-09-08 2006-08-24 Faltbares Rollstuhl-Fahrgestell und faltbarer Rollstuhl

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP06795761.3A Active EP1931295B1 (de) 2005-09-08 2006-08-24 Faltbares Rollstuhl-Fahrgestell und faltbarer Rollstuhl

Country Status (2)

Country Link
EP (2) EP1762210A1 (de)
WO (1) WO2007029131A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015522A1 (fr) * 2007-07-30 2009-02-05 Genteel Homecare Products Co., Ltd. Fauteuil roulant pliable
US20130257009A1 (en) * 2012-04-02 2013-10-03 ActivX Mobility Adjustable Wheelbase Wheelchair
US9655794B2 (en) * 2015-10-07 2017-05-23 Edward T. Bednarz, III Adjustable wheelchair

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH714557A1 (de) * 2018-01-15 2019-07-15 Kueschall Rainer Faltrollstuhl.
USD976763S1 (en) 2021-02-10 2023-01-31 Drive Devilbiss Healthcare Rollator
US11559459B2 (en) 2021-02-16 2023-01-24 Drive Devilbiss Healthcare Rollator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142351A (en) * 1962-01-19 1964-07-28 Canadian Res Stair climbing wheelchair
US4648619A (en) * 1985-03-08 1987-03-10 Molnlycke Ab Collapsible wheelchair chassis
US5782483A (en) * 1995-06-05 1998-07-21 Adorno/Rogers Technology, Inc. Adjustable wheelbase wheelchair
US6499762B1 (en) * 1995-06-05 2002-12-31 Adorno/Rogers Technology, Inc. Frame support apparatus and coupling device for use with an ambulatory system and method of fabrication thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101143A (en) * 1977-01-03 1978-07-18 American Safety Equipment Corporation Wheelchairs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142351A (en) * 1962-01-19 1964-07-28 Canadian Res Stair climbing wheelchair
US4648619A (en) * 1985-03-08 1987-03-10 Molnlycke Ab Collapsible wheelchair chassis
US5782483A (en) * 1995-06-05 1998-07-21 Adorno/Rogers Technology, Inc. Adjustable wheelbase wheelchair
US6499762B1 (en) * 1995-06-05 2002-12-31 Adorno/Rogers Technology, Inc. Frame support apparatus and coupling device for use with an ambulatory system and method of fabrication thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015522A1 (fr) * 2007-07-30 2009-02-05 Genteel Homecare Products Co., Ltd. Fauteuil roulant pliable
US20130257009A1 (en) * 2012-04-02 2013-10-03 ActivX Mobility Adjustable Wheelbase Wheelchair
US9655794B2 (en) * 2015-10-07 2017-05-23 Edward T. Bednarz, III Adjustable wheelchair

Also Published As

Publication number Publication date
EP1931295A1 (de) 2008-06-18
EP1931295B1 (de) 2013-10-09
WO2007029131A1 (fr) 2007-03-15

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