US3226128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair climbing chair
Assignee: Individual
•
Filing: 1963-09-09
•
Granted: 1965-12-28
•
Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert C Grier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; Y; Y10; Y10S; Y10S280/00; Y10S280/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A WHEEL CHAIR HAVING A FRAME AND SEAT SUPPORTED BY A PAIR OF SPACED WHEEL ASSEMBLIES WITH HUBS CARRIED BY SHAFTS, MEANS FOR ASCENDING AND DESCENDING A STAIRWAY INCLUDING, SUPPORT MEANS POSITIONED FORWARDLY OF SAID FRAME ADJUSTABLE TO THE ANGLE OF THE STAIRWAY TO BE ASCENDED OR DESCENDED, SUPPORT MEANS POSITIONED REARWARDLY OF SAID FRAME ADJUSTABLE TO THE ANGLE OF THE STAIRWAY TO BE ASCENDED OR DESCENDED, A PLURALITY OF GRIPPING MEANS SPACED CIRCUMFERENTIALLY ABOUT THE HUB OF SAID WHEEL CHAIR AND EXTENDING RADIALLY BEYOND THE WHEELS OF SAID CHAIR WHILE ASCENDING A STAIRWAY, SAID PLURALITY OF GRIPPING MEANS ROTATING REARWARDLY RESPONSIVE TO AN UPWARD AND REARWARD FORCE BEING APPLIED SUCCESIVELY TO FORWARDLY EXTENDING GRIPPING MEANS BY AN OCCUPANT OF SAID CHAIR, SAID REARWARDLY EXTENDING GRIPPING MEANS SUCCESSIVELY CONTACTING THE STEPS TO LIFT THE CHAIR UP SAID
Claim 2
Dependent Claim
138 words
IN A WHEEL CHAIR HAVING A FRAME AND SEAT SUPPORTED BY A PAIR OF SPACED WHEEL ASSEMBLIES WITH HUBS CARRIED BY SHAFTS, MEANS FOR ASCENDING AND DESCENDING A STAIRWAY INCLUDING, SUPPORT MEANS POSITIONED FORWARDLY OF SAID FRAME ADJUSTABLE TO THE ANGLE OF THE STAIRWAY TO BE ASCENDED OR DESCENDED, SUPPORT MEANS POSITIONED REARWARDLY OF SAID FRAME ADJUSTABLE TO THE ANGLE OF THE STAIRWAY TO BE ASCENDED OR DESCENDED, A PLURALITY OF GRIPPING MEANS SPACED CIRCUMFERENTIALLY ABOUT THE HUB OF SAID WHEEL CHAIR AND EXTENDING RADIALLY BEYOND THE WHEELS OF SAID CHAIR WHILE ASCENDING A STAIRWAY, SAID PLURALITY OF GRIPPING MEANS ROTATING REARWARDLY RESPONSIVE TO AN UPWARD AND REARWARD FORCE BEING APPLIED SUCCESIVELY TO FORWARDLY EXTENDING GRIPPING MEANS BY AN OCCUPANT OF SAID CHAIR, SAID REARWARDLY EXTENDING GRIPPING MEANS SUCCESSIVELY CONTACTING THE STEPS TO LIFT THE CHAIR UP SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |