US3301574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propelling arrangement for wheeled chairs
Assignee: Individual
•
Filing: 1964-10-07
•
Granted: 1967-01-31
•
Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 Good Brian Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:29
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/02; A61G5/021; A61G5/022; A61G5/024; A61G5/025; Y; Y10; Y10S; Y10S297/00; Y10S297/04; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN INVALID WHEEL CHAIR COMPRISING A FRAME CARRYING A SEAT FOR THE OCCUPANT, A PAIR OF MAIN WHEELS AND AT LEAST ONE AUXILIARY WHEEL, ALL LOCATED WHOLLY BELOW THE LEVEL OF THE SEAT AND SUPPORTING THE FRAME FOR WHEELED MOVEMENT, AND A SEPARATE PROPULSION SYSTEM FOR EACH MAIN WHEEL, INCLUDING A MAIN LEVER PIVOTED ON AN AXIS THAT SUBSTANTIALLY COINCIDES WITH THE AXIS OF THE WHEEL, A PAWL WHICH IS PIVOTED ADJACENT TO THE FREE END OF THE MAIN LEVER, ON AN AXIS PARALLEL TO THE AXIS OF THE WHEEL, AND WHICH HAS TWO EDGES, LOCATED ON OPPOSITE SIDES OF THE PAWL AXIS, THAT ARE ENGAGEABLE WITH THE PERIPHERY OF THE WHEEL TO DRIVE THE WHEEL IN TWO OPPOSITE DIRECTIONS, A SPRING WHICH URGES THE PAWL TO A NEUTRAL POSITION OUT OF
Claim 2
Dependent Claim
132 words
AN INVALID WHEEL CHAIR COMPRISING A FRAME CARRYING A SEAT FOR THE OCCUPANT, A PAIR OF MAIN WHEELS AND AT LEAST ONE AUXILIARY WHEEL, ALL LOCATED WHOLLY BELOW THE LEVEL OF THE SEAT AND SUPPORTING THE FRAME FOR WHEELED MOVEMENT, AND A SEPARATE PROPULSION SYSTEM FOR EACH MAIN WHEEL, INCLUDING A MAIN LEVER PIVOTED ON AN AXIS THAT SUBSTANTIALLY COINCIDES WITH THE AXIS OF THE WHEEL, A PAWL WHICH IS PIVOTED ADJACENT TO THE FREE END OF THE MAIN LEVER, ON AN AXIS PARALLEL TO THE AXIS OF THE WHEEL, AND WHICH HAS TWO EDGES, LOCATED ON OPPOSITE SIDES OF THE PAWL AXIS, THAT ARE ENGAGEABLE WITH THE PERIPHERY OF THE WHEEL TO DRIVE THE WHEEL IN TWO OPPOSITE DIRECTIONS, A SPRING WHICH URGES THE PAWL TO A NEUTRAL POSITION OUT OF
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |