US3196970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair-climbing wheel chair
Assignee: Individual
•
Filing: 1963-05-17
•
Granted: 1965-07-27
•
Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Dale E Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/063; A61G5/065; Y; Y10; Y10S; Y10S280/00; Y10S280/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A STAIR-CLIMBING WHEEL CHAIR COMPRISING IN COMBINATION, A FRAME SUBSTANTIALLY A-SHAPED IN SIDE ELEVATION AND HAVING SIMILAR OPPOSITE SIDES, SEAT MEANS PIVOTALLY SUPPORTED ADJACENT THE APEX OF SAID FRAME AND BETWEEN SAID SIDES THEREOF FOR MOVEMENT BETWEEN A PLURALITY OF OPERATIVE POSITIONS, PROPELLING MEANS ROTATABLY SUPPORTED BY THE LOWER PORTION OF SAID FRAME AND COMPRISING A PLURALITY OF UNITS RESPECTIVELY SPACED LONGITUDINALLY OF SAID FRAME FORE AND AFT OF THE CENTER OF GRAVITY OF SAID SEAT MEANS THEREON, A PLURALITY OF STAIR STEP-ENAGEABLE MEMBERS PIVOTALLY SUPPORTED IN PENDANT MANNER BY SAID PROPELLING MEANS AND HAVING FLAT SURFACES ENGAGEABLE WITH THE THREADS OF SPACED STAIR STEPS, MEANS ADJUSTABLY CONNECTING SAID MEMBERS TO SAID PROPELLING MEANS TO ADAPT SAID MEMBERS FOR ENGAGEMENT WITH STAIR TREADS OF DIFFERENT HEIGHTS AND WIDTHS, AND MEANS TO ACTUATE SAID PROPELLING MEANS AND MEMBERS SUPPORTED THEREBY.
Claim 2
Dependent Claim
139 words
A STAIR-CLIMBING WHEEL CHAIR COMPRISING IN COMBINATION, A FRAME SUBSTANTIALLY A-SHAPED IN SIDE ELEVATION AND HAVING SIMILAR OPPOSITE SIDES, SEAT MEANS PIVOTALLY SUPPORTED ADJACENT THE APEX OF SAID FRAME AND BETWEEN SAID SIDES THEREOF FOR MOVEMENT BETWEEN A PLURALITY OF OPERATIVE POSITIONS, PROPELLING MEANS ROTATABLY SUPPORTED BY THE LOWER PORTION OF SAID FRAME AND COMPRISING A PLURALITY OF UNITS RESPECTIVELY SPACED LONGITUDINALLY OF SAID FRAME FORE AND AFT OF THE CENTER OF GRAVITY OF SAID SEAT MEANS THEREON, A PLURALITY OF STAIR STEP-ENAGEABLE MEMBERS PIVOTALLY SUPPORTED IN PENDANT MANNER BY SAID PROPELLING MEANS AND HAVING FLAT SURFACES ENGAGEABLE WITH THE THREADS OF SPACED STAIR STEPS, MEANS ADJUSTABLY CONNECTING SAID MEMBERS TO SAID PROPELLING MEANS TO ADAPT SAID MEMBERS FOR ENGAGEMENT WITH STAIR TREADS OF DIFFERENT HEIGHTS AND WIDTHS, AND MEANS TO ACTUATE SAID PROPELLING MEANS AND MEMBERS SUPPORTED THEREBY.
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |