WO1994022410A1 - A chair - Google Patents
A chair Download PDFInfo
- Publication number
- WO1994022410A1 WO1994022410A1 PCT/NZ1994/000026 NZ9400026W WO9422410A1 WO 1994022410 A1 WO1994022410 A1 WO 1994022410A1 NZ 9400026 W NZ9400026 W NZ 9400026W WO 9422410 A1 WO9422410 A1 WO 9422410A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chair
- seat
- leg
- seat portion
- portions
- Prior art date
Links
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
- A61G5/10—Parts, details or accessories
- A61G5/14—Standing-up or sitting-down aids
Definitions
- This invention relates to a chair and more particularly, to a chair for a person, for example a person having limited mobility.
- the invention Whilst the invention relates to a chair for persons having limited mobility, the invention is not limited to such an arrangement and the invention has applicability across the full spectrum of uses.
- a chair for a person including a frame, a seat portion mounted to said frame to pivot from a substantially horizontal seated position toward an upright position tilted to expose an upper portion of said seat portion to a front of said chair; characterised in that said seat portion is pivoted to move under the influence of weight applied thereto, a back portion provided adjacent to said seat portion, at least a lower edge portion of said back portion moveable with a rear of said seat portion as said seat portion tilts between said upright position and said seated position.
- a chair for a person including a frame, a seat portion pivotally mounted to tilt and present an upper surface thereof to the front of said support, leg and back supporting portions provided adjacent said seat portion and positioning adjacent edges thereof to be moveable with adjacent edges of said seat portion; said seat portion, leg portion and back portion moveable from an upright position whereby said portions lie with their supporting surface substantially in register and facing a front of said support, to a rest position whereby said portions are substantially out of register with said seat portions substantially horizontal and whereby said seat and back portions extend away therefrom to support the user's leg and back when said user is seated on said portion.
- a chair for a person comprising a frame, a seat supporting portion pivotally mounted to rotate between a first or seated position and a second or upright position in which the upper surface of said seat while in said first position is presented towards the front of said chair in said second position; and at least one leg or back supporting portion provided adjacent an edge of said seat portion and wherein said leg or back portion is substantially out of register with said seat portion in said first position and said leg or back portion and seat portion lie with their supporting surfaces substantially in register and facing a front of said chir in said second position.
- Figure 1 is a side view of one embodiment of the invention in the form of a chair in the seated rest position.
- Figure 2 is a cross-section of the apparatus of Figure 1 substantially along a fore and aft centre line of the seated portion thereof.
- Figure 3 is side view of the chair of Figure 1 in a substantially upright position.
- Figure 4 is a cross-section of the chair of Figure 3 according to the cross-section described in respect of Figure 2.
- Figure 5 is a front view of the support in the upright condition as shown in Figure 3.
- Figure 6 is a rear view of the support in an upright position as shown by Figure 3.
- Figures 7 to 15 show sequentially the operation of the chair sequentially operating the chair from the upright position as shown in Figure 7 to a seated position as shown by Figure 10 and then returning to a standing position at Figure 15.
- Figure 16 is a rear view of the support in a substantially upright condition showing an alternative assembly of linkage to that of the apparatus of Figures 1 and 3.
- Figure 17 is a perspective view of a further embodiment of the invention approaching a seated position.
- Figure 18 is a perspective view of the embodiment of Figure 17 approaching an upright condition.
- DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The invention described is a chair suitable for use by a person having limited mobility and in the home to enable that person to live relatively independently and be able to move from an active standing position to a seated rest position and vice versa without the need for additional assistance or physical strain.
- the apparatus of the invention is also applicable in respect of a chair for persons of unlimited mobility for normal usage but providing an unusual degree of comfort for a user in transitting between a standing position and a seated position.
- the invention is provided as a single chair and is preferably formed from suitable available materials.
- the chair is provided with a frame formed in durable formable materials such as mild steel tube of round or square cross-section, together with suitable padding support portions according to known seat construction techniques.
- the invention is not limited to these techniques and as alternative materials become available, such materials can be incorporated in the invention.
- the chair 1 in this preferred form of the invention includes a frame generally indicated by arrow 2 which in the preferred form of the invention is formed in mild steel rolled hollow section.
- the frame 2 incorporates a pair of spaced apart upstands 3 each having a foot portion 4 positioned across the base thereof to provide a means for supporting the frame 2 on a supporting surface.
- Upper portions 3a of the upstand 3 are in the preferred form of the invention provided with elongate arm rest 3b extending substantially horizontally fore and aft according to the chair and preferably extending relatively forwardly in relation to the chair so as to provide means for a person to grip the chair frame in use.
- the chair in this preferred form of the invention provides a continuous support portion as generally indicated by arrow 10 for the user.
- the support portion 10 generally defines a seat portion 11, a back portion 12 and a leg portion 13 and is positioned between the upstands 3.
- Each of the seat portion 11, back portion 12 and leg portion 13 are provided with a framework portion 14 preferably formed in suitable durable material, for example rolled hollow section mild steel and each portion is provided with a suitable bracketing means 15 to support a section of the padding 10 there adjacent so as to define the substantially continuous padded portion 16 to provide the seat portion 11, back portion 12 and leg portion 13 in a disposition able to support a person when seated thereon.
- suitable durable material for example rolled hollow section mild steel
- each of the seat portion 11, back portion 12 and leg portion 13 are preferably provided in substantially concave shells of laminated timber to thus provide substantially outwardly "concave" portions for accommodating padding for the relevant sections of the apparatus, and to provide strong and durable, yet relatively light-weight portions for the apparatus which are conveniently fabricated according to mass production techniques.
- the substantially outwardly concave shape of the seat portion 11, back portion 12 and leg portion 13 provide a convenient means for hingeably engaging the portions one relative to the other in parallel planes extending outwardly from the front of the support and furthermore, in relation to the seat portion 11, conveniently enables mounting of the seat portion 11 with its pivotal connection to the upstand 3.
- Suitable reinforcing means may be mounted between the respective inter-engaged pivots of the seat portion 11, back portion 12 and leg portion 13 so as to reinforce the laminated timber "shells", however, this is in no way essential to the invention.
- the frame portion 14 forming portions of the feet portion 11, back portion 12 and leg portion 13 are preferably pivotally and interconnected to either side of the chair on either side of a pivot connection 17 of the seat portion 11 relative to the upstands 3.
- the pivotal connections 18 and 19 of the back portion 12 and leg portion 13 respectively, are each additionally controlled as is the angular disposition of the seat portion 11 relative to the back portion 12 and leg portion 13, via linkage means 21 positioned between the leg portion 13 and the upstand 3 and a bracket portion 20 provided to extend below a level of the back portion 12 frame portion.
- the padded arrangement for the seat portion 11, back portion 12 and leg portion 13 is substantially continuous, it is to be appreciated that an alternative form of the invention, the portions can be arranged to be substantially separate padded portions without departing from the scope or spirit of the invention.
- the continuous padding arrangement is shown with reference to Figure 2 and in addition, it will be seen that in the preferred form of the invention, the leg portion 13 is provided with a footrest 22 thereon.
- the footrest 22 is provided for supporting the feet when in a seated condition and also for facilitating transition of the chair from the seated position to the upright position and vice versa.
- Figures 3 to 6 and Figure 16 show the chair in a substantially "upright” condition, that is, in a position whereby the seat, leg and back support portions 11, 12 and 13, are substantially forward facing. It will be appreciated that in this condition, the chair is in a substantially compact rest state and ready to accept a person thereon.
- the seat portion 11 is tilted forwardly and is facing toward the front of the chair and the leg supporting portion 13 depends downwardly therebelow, with the footrest portion 22 adjacent a floor level.
- the back support portion 12 is also positioned in a substantially forward position relative to the chair as a whole and the grip or arm rest portions 3b extend forwardly of the padded portion.
- the padded assembly provides a somewhat upright inclined "wall” against which a user may "back".
- Figures 6 and 7 show the apparatus also in the upright condition as shown by Figures 3 and 4.
- the seat portion 11 is substantially horizontal and is supporting a majority of the weight of the user with the centre of gravity of the seat positioned substantially over or in line with pivot 17 of the seat portion 11. A relatively stable position is therefore reached where the legs and back of the user are supported in a comfortable condition.
- this invention therefore provides a convenient means of assisting a person transitting between a standing and a seated position and vice versa utilising the balance of their body weight in relation to a pivoting or tilting action of the seat portion and corresponding movement of back and leg portions.
- the linkage means 20 and 21 may be substantially adjustable or variable in length to alter or vary the angular relationship between the seat portion, back portion and/or leg portion in either or both in the upright, seated rest position or in between, depending on requirements of use.
- FIG. 17 and 18 A yet further preferred embodiment of the invention is shown in Figures 17 and 18. Although the chair 50 in these figures is of similar operation and function to those described previously, the construction is somewhat different.
- the chair 50 as shown in Figure 17 is approaching the seated position although further rotation of the major portions being the back portion 51, seat portion 52 and leg portion 53 is required to achieve a stable seated position. In the stable seated position, the base of the seat portion 52 will approach the horizontal.
- a frame 54 is provided having leg portions on to which wheels 56 are fitted for convenience.
- This particular apparatus is provided with the wheels 56 and a handle 57 so that the chair can be easily rolled across the floor, although, this chair could just as easily be provided without the wheels 56 or with larger rear wheels more in keeping with a conventional wheelchair.
- the frame 54 is connected to a support member 58 by a pivot 59 connected to the upstand of the frame 61 supporting the arm rest 62. This pivot 59 provides the centre of rotation of the seat portion 52.
- the support arm 58 runs along opposed edges of the seat portion 52 and provides support to pivotal connections 63 and 64 to the back and leg portions 51 and 53 respectively.
- connection points 63 and 64 on to the back and leg portions 51 and 53 is accompanied by a rotation of the connection points 63 and 64 on to the back and leg portions 51 and 53.
- link members 66 and 67 to the back portion 51 and leg portion 53 respectively.
- the link portions 66 and 67 comprise substantially rigid link members mounted by a hinge connection 68 to the frame 54 and by a further hinge 69 to the back or leg portion 51 or 53. It can be seen that in this embodiment, the link member 66 and 67 are provided as separate members to the back and leg portions respectively. They are mounted to different support members being support members 71 and
- link member 66 and 67 provides support to the back and leg portions respectively, not only when in the stable seated and upright positions but also ensuring a smooth travel of these portions through the transition from one stable position to the other.
- the pivot 59 should be positioned so that the weight of the apparatus without a user in the chair or with a user in the normal seated position is slightly biased to the stable seated position. It will then require movement of the user towards an upright position and the consequential shift in the centre of load on the chair to cause the portions 51, 52 and 53 to rotate towards the upright position and assist the user out of the chair.
- a locking mechanism comprising a catch 73 and operating handle 74 is provided so that a cooperative catch on the seat portion 52 may be engaged by the catch
- leg or back portions may be dispensed with or both leg and back portions may be dispensed with, depending on the requirements of use.
- the back portion of the seat as described in the preferred embodiments could either be removed entirely or replaced by a fixed back portion available for use only in the seated position.
- the major portion of support to the user in the shifting to or from the seated position is supplied by the pivoting seat and the transfer of weight to or from the foot rest supplied on the leg portion. Therefore, although the back portion is preferred to provide extra stability when the user enters the chair in its upright condition, it is not essential to the invention.
- the leg portion 53 gains increased importance. It is this leg portion and in particular the foot rest supplied at the base of this portion which carries the weight as the user rises from the seated position and transfers that shift in weight to rotation of the seat about the pivot. Similarly, when transferring from an upright to a seated position, the weight of the user is shifted from the foot rest supplied at the base of the leg portion 53 to the seat portion 52.
- leg portion could be dispensed with due to the reduced need for the foot rest to carry the weight transfer. Nevertheless, the leg portion and in particular the foot rest is still preferred so that it may support the user and lower the users feet to the ground or from the ground during operation.
- the invention has also been described with reference to the provision of a substantially static chair frame.
- the invention is applied to a mobile arrangement, being a wheelchair.
- Other forms could include an invalid's trolley or other assembly.
- the apparatus may be able to be incorporated into vehicle seats where conditions of use so require.
- a support for a person to enable a person to readily move between an upright and a seated position and from a seated position to an upright position, with reduced body strain.
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)
- Finger-Pressure Massage (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Liquid Crystal (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Special Chairs (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ265395A NZ265395A (en) | 1993-04-06 | 1994-04-06 | Chair; comprises a seat portion, a back portion and a leg support, these portions being displaceable to pivot the seat portion from horizontal towards a vertical position |
AU65835/94A AU691176B2 (en) | 1993-04-06 | 1994-04-06 | A chair |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ247349 | 1993-04-06 | ||
NZ24734993 | 1993-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994022410A1 true WO1994022410A1 (en) | 1994-10-13 |
Family
ID=19924321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NZ1994/000026 WO1994022410A1 (en) | 1993-04-06 | 1994-04-06 | A chair |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU691176B2 (en) |
WO (1) | WO1994022410A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534570A1 (en) * | 1995-09-18 | 1997-03-20 | Littec G Litterst Gmbh Tech Ve | Chair for assisting invalids with standing |
WO1998052509A1 (en) * | 1997-05-24 | 1998-11-26 | Karl Wingett Smith | An improved mechanism for elevating seats |
GB2326823A (en) * | 1997-05-24 | 1999-01-06 | Karl Wingett Smith | Elevating seat |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU678772B2 (en) * | 1992-10-06 | 1997-06-12 | Peter Alan Smith | Nursing chair |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553127A (en) * | 1967-12-01 | 1969-01-10 | ||
GB2149294A (en) * | 1983-08-23 | 1985-06-12 | Alan Taylor | Chair lift |
GB2183150A (en) * | 1985-09-26 | 1987-06-03 | Cluney Upholstery Limited | Chair |
DE3815435A1 (en) * | 1988-05-06 | 1989-11-16 | Dieter Schaller | Chair having a seat that can be tilted forwards and upwards about a pivot axis |
WO1990008669A1 (en) * | 1989-02-01 | 1990-08-09 | Retec Pr, Inc. | Combination wheelchair and walker apparatus |
FR2663218A1 (en) * | 1990-06-15 | 1991-12-20 | Tanis | Motorised chair providing assistance for the vertical movements of the user |
WO1993017649A1 (en) * | 1992-03-02 | 1993-09-16 | Bessiere Noel | Armchair convertible into a stretcher bed |
-
1994
- 1994-04-06 WO PCT/NZ1994/000026 patent/WO1994022410A1/en active Application Filing
- 1994-04-06 AU AU65835/94A patent/AU691176B2/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553127A (en) * | 1967-12-01 | 1969-01-10 | ||
GB2149294A (en) * | 1983-08-23 | 1985-06-12 | Alan Taylor | Chair lift |
GB2183150A (en) * | 1985-09-26 | 1987-06-03 | Cluney Upholstery Limited | Chair |
DE3815435A1 (en) * | 1988-05-06 | 1989-11-16 | Dieter Schaller | Chair having a seat that can be tilted forwards and upwards about a pivot axis |
WO1990008669A1 (en) * | 1989-02-01 | 1990-08-09 | Retec Pr, Inc. | Combination wheelchair and walker apparatus |
FR2663218A1 (en) * | 1990-06-15 | 1991-12-20 | Tanis | Motorised chair providing assistance for the vertical movements of the user |
WO1993017649A1 (en) * | 1992-03-02 | 1993-09-16 | Bessiere Noel | Armchair convertible into a stretcher bed |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534570A1 (en) * | 1995-09-18 | 1997-03-20 | Littec G Litterst Gmbh Tech Ve | Chair for assisting invalids with standing |
WO1998052509A1 (en) * | 1997-05-24 | 1998-11-26 | Karl Wingett Smith | An improved mechanism for elevating seats |
GB2326823A (en) * | 1997-05-24 | 1999-01-06 | Karl Wingett Smith | Elevating seat |
Also Published As
Publication number | Publication date |
---|---|
AU6583594A (en) | 1994-10-24 |
AU691176B2 (en) | 1998-05-14 |
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