US3157258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque limiting coupling and positive clutch mechanism
Assignee: Individual
•
Filing: 1961-06-16
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Granted: 1964-11-17
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Cronholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/04; B; B25; B25B; B25B23/00; B25B23/14; B25B23/142; B25B23/1422; B25B23/1427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A TORQUE LIMITING TOOL HAVING A HANDLE AND A TORQUE COUPLING ENCASED WITHIN ITS HANDLE AND COMPRISING A DRIVING MEMBER FIXEDLY ATTACHED TO THE HANDLE AND HAVING AN EXTENDED PORTION OF POLYGONAL CROSS SECTION, A DRIVEN MEMBER EXTENDING FROM THE HANDLE AND INCLUDING A SPRING MEMBER FIXEDLY ATTACHED TO THE DRIVEN MEMBER, THE SPRING MEMBER BEING ARRANGED TO GRIP THE POLYGONAL EXTENDED PORTION OF THE DRIVING MEMBER AND HAVING A SLOT EXTENDING ALONG ITS LENGTH TO PERMIT THE EXPANSION OF THE SPRING SO THAT THE POLYGONAL PORTION OF THE DRIVING MEMBER MAY ROTATE RELATIVE TO THE SPRING MEMBER UPON THE APPLICATION OF EXCESSIVE TORQUE, AND MEANS WITHIN THE HANDLE ADAPTED TO LOCK THE DRIVING MEMBER AND THE DRIVEN MEMBER TOGETHER TO PREVENT RELATIVE ROTATION WITH RESPECT TO EACH OTHER INCLUDING MATING SURFACES ENCLOSED BY SAID SPRING ON ADJACENT PORTIONS OF THE RESPECTIVE MEMBERS AND MEANS FOR MAINTAINING THE MATING SURFACES OUT OF ENGAGEMENT FOR ONE POSITION OF THE TOOL.
Claim 2
Dependent Claim
159 words
A TORQUE LIMITING TOOL HAVING A HANDLE AND A TORQUE COUPLING ENCASED WITHIN ITS HANDLE AND COMPRISING A DRIVING MEMBER FIXEDLY ATTACHED TO THE HANDLE AND HAVING AN EXTENDED PORTION OF POLYGONAL CROSS SECTION, A DRIVEN MEMBER EXTENDING FROM THE HANDLE AND INCLUDING A SPRING MEMBER FIXEDLY ATTACHED TO THE DRIVEN MEMBER, THE SPRING MEMBER BEING ARRANGED TO GRIP THE POLYGONAL EXTENDED PORTION OF THE DRIVING MEMBER AND HAVING A SLOT EXTENDING ALONG ITS LENGTH TO PERMIT THE EXPANSION OF THE SPRING SO THAT THE POLYGONAL PORTION OF THE DRIVING MEMBER MAY ROTATE RELATIVE TO THE SPRING MEMBER UPON THE APPLICATION OF EXCESSIVE TORQUE, AND MEANS WITHIN THE HANDLE ADAPTED TO LOCK THE DRIVING MEMBER AND THE DRIVEN MEMBER TOGETHER TO PREVENT RELATIVE ROTATION WITH RESPECT TO EACH OTHER INCLUDING MATING SURFACES ENCLOSED BY SAID SPRING ON ADJACENT PORTIONS OF THE RESPECTIVE MEMBERS AND MEANS FOR MAINTAINING THE MATING SURFACES OUT OF ENGAGEMENT FOR ONE POSITION OF THE TOOL.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |