US4898425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat belt kit for wheelchairs
Assignee: Canadian Posture and Seating Centre 1988 Inc
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Filing: 1989-06-28
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Granted: 1990-02-06
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Expires: 2009-06-28
Abstract
Abstract A wheelchair seat back kit is disclosed, including a seat back defining shell having a generally upright back portion, and two integral sides leading forward therefrom. The outside dimension between the sides is less than the clear distance between the back posts of a wheelchair. Attachment points are provided for securing the shell with respect to the back posts at upper and lower seat back attachment points, with the back of the shell positionable rearward of the plane of the back posts. Preferably, at least the lower portions of the sides of the seat back project forward sufficiently to provide lateral hip support for a user of the wheelchair, and padding is positionable on the inside of the lower portions of the sides to narrow the dimension between the lower portions as required to provide the hip support for any given user. Bracket assemblies may be used to provide different seat back positions and angles. For example, the bracket assemblies may each include a vertical seat back support plate extending rearwardly from each back post, each support plate having several upper and lower attachment points.
Inventors
- 👤 Philip C. Mundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/12; A61G5/1054; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A seat back kit attachable to the back posts of a wheelchair, comprising: a seat back defining shell having a generally upright back portion and two integral sides leading forward therefrom, the outside dimension between said sides being less than the clear distance between the back posts of a wheelchair; attachment means for securing said shell with respect to said back posts at upper and lower seat back attachment points with the back of said shell positionable rearward of the plane of said back posts.
Claim 2
Dependent Claim
85 words
A seat back kit attachable to the back posts of a wheelchair, comprising: a seat back defining shell having a generally upright back portion and two integral sides leading forward therefrom, the outside dimension between said sides being less than the clear distance between the back posts of a wheelchair; attachment means for securing said shell with respect to said back posts at upper and lower seat back attachment points with the back of said shell positionable rearward of the plane of said back posts.
Claim 3
Dependent Claim
33 words
A seat back kit as recited in claim 1, in which said attachment means provide a plurality of upper and lower attachment points whereby the position of the seat back may be varied.
Claim 4
Dependent Claim
38 words
A seat back kit as recited in claim 1 in which at least the lower portions of said integral sides lead forward from said back portion sufficiently to provide lateral hip support for a user of the wheelchair.
Claim 5
Dependent Claim
43 words
A seat back kit as recited in claim 3, further comprising padding means positionable on the inside of said lower portions of said sides to narrow the dimension between said lower portions as required to provide said hip support for any given user.
Claim 6
Dependent Claim
66 words
A seat back kit as recited in claim 1, attachable to the back posts of a wheelchair in which said attachment means comprises bracket means extending rearwardly from each said back post and providing said upper and lower seat back attachment points rearward of the plane of said back posts, said shell being provided with means for engaging said upper and lower seat back attachment points.
Claim 7
Dependent Claim
41 words
A seat back kit as recited in claim 5, in which said upper and lower seat back attachment points and said means attached to said shell for engaging same are adapted for engagement/attachment in at least two different seat back positions.
Claim 8
Dependent Claim
114 words
A seat back kit as recited in claim 5, in which said bracket means comprises two bracket assemblies, one extending rearwardly from each said back post, each bracket assembly comprising a vertical support plate, said support plate having at least two vertical notches in the top thereof and at least two holes in a horizontal row near the bottom thereof, and in which said engagement means attached to said shell comprises a stud at each shell location corresponding to an upper attachment point, for engaging one of said notches, and a horizontally retractable pin at each shell location corresponding to a lower attachment point, for moving in and out of one of said holes.
Claim 9
Dependent Claim
57 words
A seat back kit as recited in claim 7, in which each said support plate is attached to a mounting bracket, said mounting bracket being attachable to said back post, said support plate being fastenable to said mounting bracket at at least two different vertical locations, thereby providing vertical adjustability in the location of said seat back.
Claim 10
Dependent Claim
58 words
A seat back kit as recited in claim 8, in which said mounting bracket is L-shaped, one arm of the L-shape being adapted for attachment to a back post, and the other arm of the L-shape and the support plate having a plurality of holes alignable at at least two different relative positions, thereby providing said vertical adjustability.
Claim 11
Dependent Claim
66 words
A seat back kit as recited in claim 3, attachable to the back posts of a wheelchair in which said attachment means comprises bracket means extending rearwardly from each said back post and providing said upper and lower seat back attachment points rearward of the plane of said back posts, said shell being provided with means for engaging said upper and lower seat back attachment points.
Claim 12
Dependent Claim
41 words
A seat back kit as recited in claim 10, in which said upper and lower seat back attachment points and said means attached to said shell for engaging same are adapted for engagement/attachment in at least two different seat back positions.
Claim 13
Dependent Claim
114 words
A seat back kit as recited in claim 10, in which said bracket means comprises two bracket assemblies, one extending rearwardly from each said back post, each bracket assembly comprising a vertical support plate, said support plate having at least two vertical notches in the top thereof and at least two holes in a horizontal row near the bottom thereof, and in which said engagement means attached to said shell comprises a stud at each shell location corresponding to an upper attachment point, for engaging one of said notches, and a horizontally retractable pin at each shell location corresponding to a lower attachment point, for moving in and out of one of said holes.
Claim 14
Dependent Claim
57 words
A seat back kit as recited in claim 12, in which each said support plate is attached to a mounting bracket, said mounting bracket being attachable to said back post, said support plate being fastenable to said mounting bracket at at least two different vertical locations, thereby providing vertical adjustability in the location of said seat back.
Claim 15
Dependent Claim
58 words
A seat back kit as recited in claim 13, in which said mounting bracket is L-shaped, one arm of the L-shape being adapted for attachment to a back post, and the other arm of the L-shape and the support plate having a plurality of holes alignable at at least two different relative positions, thereby providing said vertical adjustability.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |