US3304094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Climbing wheel chair
Assignee: Individual
•
Filing: 1964-12-22
•
Granted: 1967-02-14
•
Expires: 1984-12-22
Abstract
No abstract record available.
Inventors
- 👤 Richard B Wenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:07
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/08; A61G5/0808; A61G5/0816; A61G5/0825; Y; Y10; Y10S; Y10S280/00; Y10S280/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A WHEEL CHAIR COMPRISING A SEAT FRAME HAVING DEPENDING REAR SUPPORTING LEG MEANS AND DEPENDING FRONT SUPPORTING LEG MEANS, SUPPORTING WHEELS CONNECTED TO THE SEAT FRAME AT ITS OPPOSITE SIDES, RESPECTIVE ELLIPTICAL WHEELS SLIDABLY AND PIVOTALLY CONNECTED TO THE OPPOSITE SIDES OF THE SEAT FRAME AT THE REAR PORTION THEREOF AND ARRANGED IN VERTICAL LONGITUDINAL PLANES, MEANS TO ROTATE SAID ELLIPTICAL WHEELS INTO ENGAGEMENT WITH A REARWARDLY ADJACENT STAIR STEP, WHEREBY TO ELEVATE THE REAR PORTION OF THE SEAT FRAME, RESPECTIVE CASTER ASSEMBLIES SLIDABLY CONNECTED TO THE FRONT SUPPORTING LEG MEANS AT THE OPPOSITE SIDES OF THE SEAT FRAME, AND MEANS TO AT TIMES EXTEND SAID CASTER ASSEMBLIES DOWNWARDLY SO THAT THE SEAT FRAME MAY BE LEVELLED AND WHEN THE REAR PORTION THEREOF IS RAISED OR LOWERED.
Claim 2
Dependent Claim
127 words
A WHEEL CHAIR COMPRISING A SEAT FRAME HAVING DEPENDING REAR SUPPORTING LEG MEANS AND DEPENDING FRONT SUPPORTING LEG MEANS, SUPPORTING WHEELS CONNECTED TO THE SEAT FRAME AT ITS OPPOSITE SIDES, RESPECTIVE ELLIPTICAL WHEELS SLIDABLY AND PIVOTALLY CONNECTED TO THE OPPOSITE SIDES OF THE SEAT FRAME AT THE REAR PORTION THEREOF AND ARRANGED IN VERTICAL LONGITUDINAL PLANES, MEANS TO ROTATE SAID ELLIPTICAL WHEELS INTO ENGAGEMENT WITH A REARWARDLY ADJACENT STAIR STEP, WHEREBY TO ELEVATE THE REAR PORTION OF THE SEAT FRAME, RESPECTIVE CASTER ASSEMBLIES SLIDABLY CONNECTED TO THE FRONT SUPPORTING LEG MEANS AT THE OPPOSITE SIDES OF THE SEAT FRAME, AND MEANS TO AT TIMES EXTEND SAID CASTER ASSEMBLIES DOWNWARDLY SO THAT THE SEAT FRAME MAY BE LEVELLED AND WHEN THE REAR PORTION THEREOF IS RAISED OR LOWERED.
References Cited (Backward Citations)
US705731A
Cited
US2572910A
Cited
US2982560A
Cited
US3231036A
Cited
US3178193A
Cited
US3227465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |