GB2361177A - Wheelchair with means for securing detachable seat - Google Patents

Wheelchair with means for securing detachable seat Download PDF

Info

Publication number
GB2361177A
GB2361177A GB0008794A GB0008794A GB2361177A GB 2361177 A GB2361177 A GB 2361177A GB 0008794 A GB0008794 A GB 0008794A GB 0008794 A GB0008794 A GB 0008794A GB 2361177 A GB2361177 A GB 2361177A
Authority
GB
United Kingdom
Prior art keywords
frame
seat unit
wheelchair
backrest
base portion
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Withdrawn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
GB0008794A
Other versions
GB0008794D0 (en
Inventor
David Oliver Batty
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.)
Remploy Ltd
Original Assignee
Remploy Ltd
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 Remploy Ltd filed Critical Remploy Ltd
Priority to GB0008794A priority Critical patent/GB2361177A/en
Publication of GB0008794D0 publication Critical patent/GB0008794D0/en
Publication of GB2361177A publication Critical patent/GB2361177A/en
Withdrawn legal-status Critical Current

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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • 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
    • A61G5/14—Standing-up or sitting-down aids

Abstract

A wheelchair comprises a frame having a base portion, a backrest portion which is pivotable between an upright position into a folded position, and a detachable seat unit (4). The base portion includes front engagement means (6) at its front edge for engaging a front portion of the seat unit (4) when the seat unit (4) is positioned on the frame and the backrest portion of the frame includes locking means for engaging with a portion of the back of the seat unit (4) when the backrest portion is pivoted from its folded position into its upright position such that the seat unit (4) is securely locked into the frame.

Description

2361177 1 WHEELCHAIR SEATING INTERFACE The present invention concerns a
means for fitting a seat into the frame of a wheelchair. It is known to fit detachable shaped seats into standard wheelchairs, but it is difficult to provide a means of locking the seat into the wheelchair securely, and in particular, sufficiently securely to pass safety crash tests.
It is also known for standard wheelchairs to include backrests which, together with the handles for the wheelchair, can fold down from an upright position to more easily stare the wheelchair.
According to the present invention, a wheelchair comprises a frame having a base portion and a backrest is portion which is pivotable between an upright position into a folded position; and a detachable seat unit; wherein the base portion includes front engagement means at its front edge for engaging a front portion of the seat unit when the seat unit is positioned on the frame; and wherein the backrest portion of the frame 'includes locking means for engaging with a portion of the back of the seat unit when the backrest portion is pivoted from its folded position into its upright position such that the seat unit is securely locked into the frame.
To fit the seat unit into the frame, the front portion of the seat unit is engaged with the engagement means on the front of the base portion of the frame and positioned correctly on the wheelchair frame. The backrest portion of the frame is then pivoted into its upright position and the locking means lock the seat unit securely in position. It has not previously been suggested to employ the folding backrest portion of a wheelchair to lock a detachable seat unit in position, and the present inventors have found that this provides a particularly strong and secure locking of the seat unit into the frame which passes the required safety tests. Furthermore, the method of construction is 2 simple and employs features which are already present in standard wheelchairs, thereby allowing easy modification Of existing designs.
Preferably, the backrest portion compr2.ses the upper part of a back portion of the frame, and the lower part of the back portion of the frame is fixed. The seat unit is initially located against the fixed part of the back portion of the frame, and the pivotable portion folds up to lock the seat unit in position. The f ixed portion of the back portion more securely resists backwards movement of the seat unit.
Preferably, the seat unit includes an L-shaped interface frame member on each side. Preferably, the engagement of the front of the seat unit with the front of the base portion of the same is achieved by means of slots in the front ends of the L-shaped interface frame members which engage with spigots provided on brackets secured to the front of the base portion of the wheelchair frame. The slots are engaged with the spigots and the seat unit is pivoted around the spigots into position on the frame.
Preferably, the locking means comprises spigots on the other ends of each of the L-shaped members and arcuate slots in brackets on either side of the backrest portion of the frame. As the backrest portion of the frame is pivoted upwards into its upright position, the spigots on the interface frame members engage with the arcuate slots. When the backrest portion is in its fully upright position, it is locked in position by standard means. The seat unit is thereby prevented from forwards movement by both the spigots engaged at the f ront of the seat unit and the spigots engaged in the arcuate slots in the brackets on the backrest.
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:- Figure 1 shows an embodiment of the present invention with the backrest in the upright position; 3 Figure 2 shows an embodiment of the present invention with the backrest in the folded position; Figure 3 shows an embodiment of the present invention showing the installation of the seat unit in the frame; Figure 4a shows a side elevation of the seat unit and interface frame members; Figure 4b shows a plan view of the interface frame members; Figure Sa shows the interaction between the interface frame members and the base portion of the frame; Figure 5b shows a plan view of the interaction between the interface frame member and the base portion of the frame; Figure 6 shows the engagement between the interface is frame members and the backrest portion of the frame; and Figures 7a and 7b show the means for locking the backrest in the upright position.
A wheelchair includes a frame having a base portion 1 and a back portion 2, the back portion 2 comprising a fixed portion 2a and a pivotable backrest portion 2b having handles 3. The backrest portion 2a is pivotable from a folded position as shown in Figure 2 and an upright position as shown in Figure 1. The wheelchair also includes a seat unit 4 which is detachable from the frame. The seat unit includes L-shaped interface frame members 5, one on each side of the seat unit 4. The seat unit 4 is locked into the f rame by means of a f ront engagement 6 and a locking means 7. As best illustrated in Figure 3, to f it the seat unit 4 into the frame, the f ront engagement 6, which comprises spigots on the front of the base portion of the frame which engage in slots in the front of the interface frame members 5, as indicated by arrow A, and the seat unit 4 is then pivoted downwards into a position wherein the back of the seat unit 4 is against the rigid portion 2a of the back portion of the frame, as indicated by arrow B. The pivotable back rest portion 2b is then pivoted upwards into its upright position as indicated by 4 arrow C and the back locking means 7 are engaged to lock the seat unit 4 in position.
Figures 4a and 4b show the interface frame members in more detail. The L shaped interface frame members 5 are j oined by a cross tube 8.
Figures Sa and 5b show in detail the interaction between the interface frame members 5 and the front of the base portion 1 of the wheelchair frame to form the front engagement means 6. A slot 9 in the end of each interface frame member 5 engages on a spigot 10 on the base portion 1 of the wheelchair frame. The spigot 10 is fixed on a bracket 13 which is secured to the front of the base portion 1 of the wheelchair frame.
Figure 6 shows in detail the locking means 7. A spigot 11 on each interface member 5 engages in an arcuate slot 12 in a bracket 13 attached to the pivoting portion 2b of the back portion of the frame. As the backrest portion 2b is pivoted into its upright position, the spigot 11 engages in the arcuate slot 12 and when the backrest portion 2b is in its fully upright position, it is locked in position. The spigot 11 in the arcuate slot 12 resists forces acting on the seat unit in a forwards or backwards direction.
Figures 7a and 7b show a standard means for locking the backrest portion 2b in its upright position, as used in many available wheelchairs. A plunger 13 inside the frame of the backrest portion 2b slides down inside the hollow f rame to bridge the j oint 15 between the f rame of the backrest portion 2b and the fixed portion 2a. The plunger 13 is operated by a projecting knob 14 which projects from the frame through a slot.

Claims (5)

  1. CLAIMS is 1. A wheelchair comprising a frame having a base portion and a
    backrest portion which is pivotable between an upright position into a folded position; and a detachable seat unit; wherein the base portion includes front engagement means at its front edge for engaging a front portion of the seat unit when the seat unit is positioned on the frame; and wherein the backrest portion of the frame includes locking means for engaging with a portion of the back of the seat unit when the backrest portion is pivoted from its folded position into its upright position such that the seat unit is securely locked into the frame.
  2. 2. A wheelchair according to claim 1, wherein the backrest portion comprises the upper part of a back portion of the f rame, and the lower part of the back portion of the frame is fixed.
  3. 3. A wheelchair according to claim 1 or 2 wherein the seat unit includes an L-shaped interface frame member on each side.
  4. 4. A wheelchair according to claim 3, wherein the engagement of the front of the seat unit with the front of the base portion of the same is achieved by means of slots in the front ends of the L-shaped interface frame members which engage with spigots provided on brackets secured to the front of the base portion of the wheelchair frame.
  5. 5. A wheelchair according to claim 3 or 4, wherein the locking means comprises spigots on the L-shaped members and arcuate slots in brackets on either side of the backrest portion of the frame.
GB0008794A 2000-04-10 2000-04-10 Wheelchair with means for securing detachable seat Withdrawn GB2361177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0008794A GB2361177A (en) 2000-04-10 2000-04-10 Wheelchair with means for securing detachable seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0008794A GB2361177A (en) 2000-04-10 2000-04-10 Wheelchair with means for securing detachable seat

Publications (2)

Publication Number Publication Date
GB0008794D0 GB0008794D0 (en) 2000-05-31
GB2361177A true GB2361177A (en) 2001-10-17

Family

ID=9889593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0008794A Withdrawn GB2361177A (en) 2000-04-10 2000-04-10 Wheelchair with means for securing detachable seat

Country Status (1)

Country Link
GB (1) GB2361177A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4170368A (en) * 1976-11-22 1979-10-09 Southward Engineering Co. Limited Transportation of disabled or invalided persons
US4593929A (en) * 1983-01-12 1986-06-10 Williams Ronald H Wheelchair
US5052647A (en) * 1988-09-15 1991-10-01 Pin Dot Products Quick release coupler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4170368A (en) * 1976-11-22 1979-10-09 Southward Engineering Co. Limited Transportation of disabled or invalided persons
US4593929A (en) * 1983-01-12 1986-06-10 Williams Ronald H Wheelchair
US5052647A (en) * 1988-09-15 1991-10-01 Pin Dot Products Quick release coupler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE 3038249 A & WPI Abstract 1982-K4772E *

Also Published As

Publication number Publication date
GB0008794D0 (en) 2000-05-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)