US4528711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable wheel chair ramp
Assignee: Individual
•
Filing: 1983-07-22
•
Granted: 1985-07-16
•
Expires: 2003-07-22
Abstract
Abstract A lightweight portable wheel chair ramp comprising a pair of ramps detachably secured to one another in a compact, portable configuration. Each ramp is telescopically extensible with oppositely disposed non-slip surface engaging flanges and can be adjustably locked to the length required. A pair of alignment and spacer brackets secure the ramps together in spaced parallel relation during operation. The ramps can be detached from one another, collapsed and secured together for ease of transport.
Inventors
- 👤 Louis Packer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:26
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/061
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A portable self-contained wheel chair ramp comprising a pair of ramps, each of said ramps having first and second elongated telescopically engaged support members that are cross sectionally U-shaped, inturned and downturned continuously extending flanges on each of said first support members arranged to overlie portions of each of said second support members, longitudinally extending angularly disposed support flanges on the ends of each of said ramps, a pair of transversely positioned elongated spacer brackets, the ends of which are respectively attached to said support flanges whereby said pairs of ramps are uniformly transversely spaced with respect to one another.
Claim 2
Dependent Claim
100 words
A portable self-contained wheel chair ramp comprising a pair of ramps, each of said ramps having first and second elongated telescopically engaged support members that are cross sectionally U-shaped, inturned and downturned continuously extending flanges on each of said first support members arranged to overlie portions of each of said second support members, longitudinally extending angularly disposed support flanges on the ends of each of said ramps, a pair of transversely positioned elongated spacer brackets, the ends of which are respectively attached to said support flanges whereby said pairs of ramps are uniformly transversely spaced with respect to one another.
Claim 3
Dependent Claim
39 words
The portable self-contained wheel chair ramp of claim 1 wherein said angularly disposed support flanges each having downwardly extending, transversely extending, apertured channels registrable with said spacer brackets for positioning the same at right angles to said support flanges.
Claim 4
Dependent Claim
34 words
The portable self-contained wheel chair ramp of claim 1 wherein said inturned and downturned flanges are inverted U-shaped so as to cage the upper longitudinal edges of said second elongated telescopically engaged support member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |