Patent US1305840A successfully refreshed from Google Patents.
Patent US3217340A successfully refreshed from Google Patents.
US3217340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrograde brake for stretcher elevating mechanism
Assignee: Everest and Jennings Inc
•
Filing: 1963-06-24
•
Granted: 1965-11-16
•
Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Ronald L Durr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:01
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/10; A61G7/1013; A61G7/1019; A61G1/00; A61G1/04; A61G1/052; A61G7/104; A61G7/1046; A61G7/1049; A61G7/1057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN A WHEELED STRECHER, AN AMBULATORY MAIN FRAME, A STRETCHER FRAME ABOVE THE MAIN FRAME, A STRETCHER FRAME ELEVATOR MOVABLE TO RAISE AND LOWER THE STRETCHER FRAME RELATIVE TO THE MAIN FRAME, AN OPERATING SCREW SHAFT ROTATABLY SUPPORTED BY ONE OF SAID FRAMES AND HAVING AN UNTHREADED PORTION AND A THREADED PORTION, A SCREW FOLLOWER ON THE THREADED PORTION OF SAID SCREW SHAFT AND CONNECTED TO SAID ELEVATOR AT ONE PART THEREOF, ANOTHER PART OF THE ELEVATOR BEING CONNECTED TO THE FRAME OTHER THAN THE ONE TO WHICH THE OPERATING SCREW IS CONNECTED, A BRAKE ELEMENT ROTATABLY MOUNTED ON THE UNTHREADED PORTION OF THE SCREW SHAFT FOR ROTATION THEREWITH, AN OVERRUNNING CLUTCH HAVING A RELATIVELY STATIONARY PORTION AND A ROTATABLE PORTION, AND SAID ROTATABLE PORTION HAVING A BRAKING SURFACE ENGAGING SAID BRAKE ELEMENT.
Claim 2
Dependent Claim
133 words
IN A WHEELED STRECHER, AN AMBULATORY MAIN FRAME, A STRETCHER FRAME ABOVE THE MAIN FRAME, A STRETCHER FRAME ELEVATOR MOVABLE TO RAISE AND LOWER THE STRETCHER FRAME RELATIVE TO THE MAIN FRAME, AN OPERATING SCREW SHAFT ROTATABLY SUPPORTED BY ONE OF SAID FRAMES AND HAVING AN UNTHREADED PORTION AND A THREADED PORTION, A SCREW FOLLOWER ON THE THREADED PORTION OF SAID SCREW SHAFT AND CONNECTED TO SAID ELEVATOR AT ONE PART THEREOF, ANOTHER PART OF THE ELEVATOR BEING CONNECTED TO THE FRAME OTHER THAN THE ONE TO WHICH THE OPERATING SCREW IS CONNECTED, A BRAKE ELEMENT ROTATABLY MOUNTED ON THE UNTHREADED PORTION OF THE SCREW SHAFT FOR ROTATION THEREWITH, AN OVERRUNNING CLUTCH HAVING A RELATIVELY STATIONARY PORTION AND A ROTATABLE PORTION, AND SAID ROTATABLE PORTION HAVING A BRAKING SURFACE ENGAGING SAID BRAKE ELEMENT.
References Cited (Backward Citations)
US836397A
Cited
US2587094A
Cited
US2521214A
Cited
US2742082A
Cited
US2783861A
Cited
US2934188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |