IE55704B1 - Invalid chair based on composite materials - Google Patents
Invalid chair based on composite materialsInfo
- Publication number
- IE55704B1 IE55704B1 IE2355/84A IE235584A IE55704B1 IE 55704 B1 IE55704 B1 IE 55704B1 IE 2355/84 A IE2355/84 A IE 2355/84A IE 235584 A IE235584 A IE 235584A IE 55704 B1 IE55704 B1 IE 55704B1
- Authority
- IE
- Ireland
- Prior art keywords
- polygons
- pair
- chair
- sides
- invalid
- Prior art date
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims description 13
- 230000001413 cellular effect Effects 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
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
-
- 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
- A61G5/0816—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
-
- 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
- A61G5/12—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
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)
- Rehabilitation Tools (AREA)
- Handcart (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Invalid chair or wheel-chair based on composite materials comprising particularly a seat secured between two sides (1), each side comprising a drive wheel (7) providing with a handrail (9), a supporting and steering-wheel (6) and a foot rest (5). Both sides (1) and both drive wheels (7) as well as the foot rests (5) and means for holding the sides (1) spread apart and for holding said chair are made totally or partly with composite materials.
[WO8501205A1]
Description
2 255704 The present invention relates to an invalid chair, or wheelchair, based on composite materials.
Wheelchairs of this type are essentially constituted by a seat supported by drive wheels which are possibly provided with a hand-wheel, 5 and by support and steering wheels. These chairs generally comprise footrests. They may possibly be foldable on themselves so that they can be placed for example in a car boot, thanks to cross bars pivoting with respect to each other about a common axis lying at the centre thereof. The ends of these bars are fixed by a pivoting device to the side walls of the chair 10 or to structures fast therewith.
These presently known wheelchairs are made from a tubular structure, generally made of chromium-plated metal. However, such a structure is heavy: consequently, the invalid, or the person accompanying him, often finds it difficult to fold then lift such a wheelchair when this proves neces-15 sary.
It is therefore one of the objects of the present invention to provide an invalid chair, or wheelchair, which is both robust and as light as possible.
Another object of the invention is to provide such a wheelchair which is simple and reliable to fold and unfold.
It is a further object of the invention to provide a wheelchair of this type at a relatively moderate cost.
These objects as well as others which will appear hereinafter, are attained by a foldable invalid chair comprising: - two lateral sides ; 25 a driving wheel and a steering wheel carried by each of said sides ; - means for holding said lateral sides apart and for folding the cha ir ; and - a seat fixed to each of said sides .
According to the present invention, said two lateral sides and said two driving wheels are of a composite material comprising two walls made of a filamentous armature embedded in an organic resin material, said walls being joined together with a cellular material. 3 The cellular material is preferably a foam or a material of honeycomb structure.
The holding means advantageously comprise two pairs of polygons, said polygons of each pair being articulated 5 at one of their ends to each other and articulated at the other end to one of said lateral sides respectively, each polygon being of said composite material.
The two polygons of each pair of polygons are preferably connected together with hinge means, the hinge means of one 10 pair of polygons are connected to those of the other pair of polygons by means of a bar, and a device is provided for blocking the hinge means of one of said pairs of polygons so that the two polygons of each pair of polygons are in line with each other. -)5 The invention will be more readily understood on reading the following description with reference to the accompanying drawings, in which: Fig. I shows a schematic side view of an invalid chair according to the present invention, Fig. 2 is a rear view of this same chair, and 20 Fig. 3 is a schematic view from underneath of the chair shown in Fig. 2.
Referring now to the drawings, (he following description refers to an invalid chair in unfolded position, i.e. when used by an invalid.
Such a wheelchair comprises side elements on each of its sides and, for reasons of convenience, the major part of the specification will refer only to one of these side elements.
Thus, side element I comprises a base part 2, a front vertical part 3 and a rear vertical part ¢.
Each side element I is constituted by two walls, or skins, made of a composite material, coupled together so as to define a space adapted to be filled with a cellular material such as a foam or a material of honeycomb structure.
The front vertical part 3 is extended forwardly by a foldable 15 footrest 5 and downwardly by a support and steering wheel 6.
Drive wheels 7 are each mounted on a pin 8 passing through the rear vertical part *i, in manner known ger se. and possibly comprise on their outer part a handwheel 9 of which the distance from the wheel may vary as the invalid wishes.
These drive wheels are obtained by coupling together two half wheels 7a and 7j? which are shown schematically in Fig. 2 (the wheel being schematically shown in section along a spoke).
According to a preferred embodiment of the invention, this invalid chair also comprises means for folding and unfolding it and for maintaining 25 the two side elements in spaced apart relationship.
These means comprise at least one assembly composed of two polygons 10 and 11 which are articulated on each other, on the one hand, and each on a side element, as shown in Fig. 2, as well as other means known £er se cooperating with this assembly.
This assembly is for example disposed perpendicularly between the two rear vertical parts and at a level lower than that of the seat.
In this way, each polygon is articulated on the one hand on the corresponding rear vertical part and, on the other hand, with the other polygon preferably along a common side.
This assembly of two polygons may also be made of a composite 5 material.
The composite material used for making different elements of an invalid chair at cording to the present invention may he the same for all or dilleicnt as a function of the specific stresses on each element.
In general, for the walls, or skins, of these elements, a composite material of filamentary structure is used, whilst the space between these walls is filled with a composite material of cellular structure. The composite material of filamentary structure is constituted by a filamentous armature (carbon, polyamide, glass, etc... fibers) embedded in an organic material 10 (polyester, epoxy, acrylic, etc... resin). The composite material of cellular structure is generally a polyurethane or epoxy foam, for example, or a material of honeycomb structure. This composite material generally has a thickness of between 1 and 2 cm. For example, each side element 1 has a thickness of about 1.5 cm and is formed by two walls, or skins, each 15 0.075 cm thick, connected together by a material of honeycomb structure of which the alveolar cells have horizontal generatrices parallel to the pins 8 of the drive wheels. in the present embodiment, this invalid chair comprises two assemblies each of two polygons 10, 11 and 12, 13. The second assembly is disposed 20 at a level lower than that of the seat and perpendicularly between the front vertical parts 3.
These polygons are trapeziums which are articulated by their large base on the corresponding vertical part of the corresponding side element and by their small base on each other.
In this way, the polygons of each assembly can be folded on them selves thanks to hinges Uf and 15 respectively, disposed substantially at the centre of each assembly.
These means for maintaining the side elements I in spaced apart relationship and for folding the wheelchair, further comprise, according 30 to this embodiment, a bar 16 parallel to the side elements I and connecting the hinges for articulation of the polygons of each assembly with each other, as well as a device 17 for blocking one of these hinges (hinge M in the present example) so that the two polygons of each assembly are in line with each other.
An invalid chair according to the present invention naturally also comprises all the elements usually found in such a wheelchair: in particular, arm-rests 18 and handles 19 disposed on the vertical part 4 to enable a person accompanying the invalid to push and steer the wheelchair.
Claims (5)
1. 7
2. 1. A foldable invalid chair comprising : t wo 1 aLeral s i des ; a driving wheel and a steering wheel carried by each of said sides ; - means for holding said lateral sides apart and for folding the chair ; and - a seat fixed to each of said sides ; wherein said two lateral sides and said two driving wheels are of a composite material comprising two walls made of a filamentous armature embedded in an organic resin material, said walls being joined together with a cellular material.
3. 2. A chair according to claim 1, wherein said cellular material is a foam or a material of honeycomb structure.
4. 3. A chair according to claim 1, wherein said lidding means comprise two pairs of polygons, said polygons of each pair being articulated at one of their ends to each other and articulated at the other end to one of said lateral sides respectively, each polygon being of said composite material. A.- A chair according to claim 3, wherein the two polygons of each pair of polygons are connected together with hinge means, the hinge means of one pair of polygons are connected to those of the other pair of polygons by means of a bar, and a device is provided for blocking the hinge means of one of said two pairs of polygons so that the two polygons of each pair of polygons are in line with each other.
5.- A foldable invalid chair according to claim 1, substantially as hereinbefore described with particular reference to and as illustrated in the accompanying drawings. F.R. KELLY & CO., AGENTS FOR THE APPLICANTS.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8314706A FR2551970B1 (en) | 1983-09-15 | 1983-09-15 | ARMCHAIR FOR DISABLED PERSONS BASED ON COMPOSITE MATERIALS |
FR8413840A FR2569980B2 (en) | 1984-09-10 | 1984-09-10 | IMPROVEMENT FOR A CHAIR OF DISABLED PERSONS BASED ON COMPOSITE MATERIALS |
Publications (2)
Publication Number | Publication Date |
---|---|
IE842355L IE842355L (en) | 1985-03-15 |
IE55704B1 true IE55704B1 (en) | 1990-12-19 |
Family
ID=26223582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE2355/84A IE55704B1 (en) | 1983-09-15 | 1984-09-14 | Invalid chair based on composite materials |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0156835A1 (en) |
AU (1) | AU3392284A (en) |
CA (1) | CA1229785A (en) |
IE (1) | IE55704B1 (en) |
IT (1) | IT1179122B (en) |
WO (1) | WO1985001205A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3514572A1 (en) * | 1985-04-23 | 1986-10-30 | Günter Meier GmbH, 4952 Porta Westfalica | MEDICAL ELEVATOR |
FR2581299B1 (en) * | 1985-05-06 | 1988-07-15 | Poirier Ets | DEVICE FOR LOCKING AND UNLOCKING A FOLDABLE ARMCHAIR, IN PARTICULAR A ARMCHAIR FOR THE DISABLED |
DE3638091A1 (en) * | 1986-11-07 | 1988-05-19 | Benno Danecker | WHEELCHAIR |
US5152543A (en) * | 1990-11-15 | 1992-10-06 | Everest & Jennings, Inc | Composite frame wheelchair |
DE4210014A1 (en) * | 1992-03-27 | 1993-09-30 | Heckel Gmbh | Wheelchair with frame made from laminated carbon@ fibre plastics panels - is driven by manual actuation of rear wheels and steered by front wheels. |
GB2280405B (en) * | 1993-07-27 | 1996-09-25 | Malcolm Richard Rolston | A wheelchair |
WO1997031606A1 (en) * | 1996-03-01 | 1997-09-04 | Pacific 21 Pty. Ltd. | Side frame for a wheelchair and a wheelchair incorporating same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2592405A (en) * | 1948-06-14 | 1952-04-08 | Herbert A Everest | Collapsible commode chair |
US3142351A (en) * | 1962-01-19 | 1964-07-28 | Canadian Res | Stair climbing wheelchair |
US4026568A (en) * | 1976-02-23 | 1977-05-31 | Beverly Grant Rutledge Hallam | Triple hinged folding T frame wheelchair |
US4101143A (en) * | 1977-01-03 | 1978-07-18 | American Safety Equipment Corporation | Wheelchairs |
DE2903196C2 (en) * | 1979-01-27 | 1982-09-02 | Louis L. 7570 Baden-Baden Lepoix | Mobile hospital chair |
-
1984
- 1984-09-11 WO PCT/FR1984/000200 patent/WO1985001205A1/en not_active Application Discontinuation
- 1984-09-11 AU AU33922/84A patent/AU3392284A/en not_active Abandoned
- 1984-09-11 EP EP84903351A patent/EP0156835A1/en not_active Withdrawn
- 1984-09-14 IT IT67921/84A patent/IT1179122B/en active
- 1984-09-14 CA CA000463211A patent/CA1229785A/en not_active Expired
- 1984-09-14 IE IE2355/84A patent/IE55704B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA1229785A (en) | 1987-12-01 |
IT8467921A0 (en) | 1984-09-14 |
IT1179122B (en) | 1987-09-16 |
EP0156835A1 (en) | 1985-10-09 |
AU3392284A (en) | 1985-04-11 |
IT8467921A1 (en) | 1986-03-14 |
IE842355L (en) | 1985-03-15 |
WO1985001205A1 (en) | 1985-03-28 |
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