Patent US4457551A successfully refreshed from Google Patents.
US4457551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle speed-lock wheelchair restraint system
Assignee: TARGET INDUSTRIES Inc
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Filing: 1981-12-14
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Granted: 1984-07-03
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Expires: 2001-12-14
Abstract
Abstract A speed-lock restraint system for wheelchair systems having a frame assembly for a chair, arm rests and wheels, an inverted U-shaped main channel supported by said frame and extending between a front cross channel and a rear cross channel, an anchor supported from a floor plate having apertures therein, and a pivot arm with diametrically oppositely extending end projections, each of said projections capable of extending within said aperture in alignment and securably relating the wheelchair in speed-locking relation and restraint to a vehicle floor.
Inventors
- 👤 James W. Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:43
CPC Classifications
A; A61; A61G; A61G3/00; A61G3/08; A61G3/0808
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
Improved speed lock restraint system for wheelchair systems comprising a wheelchair frame assembly supporting a seat and wheels and including at least four vertical bar members and having plural horizontal members defining said frame assembly, an inverted U-shaped main channel horizontally disposed and extending between a pair of said horizontal members of said wheelchair frame assembly, an anchor means secured to a floor plate having at least one upstanding extension with an aperture therein, and a pivot arm centrally pivotable from said U-shaped main channel having end projections for engaging an aperture of said U-shaped main channel and said aperture of said upstanding extension when aligned.
Claim 2
Dependent Claim
106 words
Improved speed lock restraint system for wheelchair systems comprising a wheelchair frame assembly supporting a seat and wheels and including at least four vertical bar members and having plural horizontal members defining said frame assembly, an inverted U-shaped main channel horizontally disposed and extending between a pair of said horizontal members of said wheelchair frame assembly, an anchor means secured to a floor plate having at least one upstanding extension with an aperture therein, and a pivot arm centrally pivotable from said U-shaped main channel having end projections for engaging an aperture of said U-shaped main channel and said aperture of said upstanding extension when aligned.
Claim 3
Dependent Claim
32 words
The invention as defined in claim 1, further wherein a flanged guide means is arranged to extend outwardly from said main channel to allow guidance of said anchor within said main channel.
Claim 4
Dependent Claim
36 words
The invention as defined in claim 1, further wherein at least two anchor means and corresponding apertures thereof provide a dual support arrangement to secure said main channel of the wheelchair apparatus to said floor plate.
Claim 5
Dependent Claim
32 words
The invention as defined in claim 3, wherein said projections are arranged to extend in diametrically opposite directions and adapted to be engaged substantially simultaneously into said apertures in said anchor plate.
References Cited (Backward Citations)
US1644528A
Cited
US2427161A
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US3752265A
Cited
US4027747A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |