Patent US3340975A successfully refreshed from Google Patents.
US3340975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid operated clutch mechanism
Assignee: EW Bliss Co Inc
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Filing: 1965-11-09
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Granted: 1967-09-12
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Expires: 1985-11-09
Abstract
No abstract record available.
Inventors
- 👤 Erickson Frederick Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:39
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/02; F16D13/025; F16D27/00; F16D27/10; F16D27/105
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
IN A SPRING CLUTCH HAVING A DRIVEN SHAFT AND A DRIVING SHAFT AND HAVING A COMMON AXIS OF ROTATION, A COILED SPRING COAXIALLY WRAPPED ABOUT AT LEAST ADJACENT PORTIONS OF SAID SHAFTS, SAID SPRING HAVING AN INTERNAL DIAMETER SUFFICIENTLY SMALL RELATIVE TO THE OUTER DIAMETERS OF SAID SHAFTS THAT SAID SPRING IS NORMALLY IN RESILIENT GRIPPING RELATIONSHIP WITH BOTH OF SAID SHAFTS, THE IMPROVEMENT COMPRISING: SAID SPRING HAVING OPPOSING FREE ENDS; AND, CLUTCH RELEASE MEANS FOR CONCURRENTLY ENGAGING AND DISPLACING SAID FREE ENDS IN OPPOSING DIRECTIONS ABOUT SAID COMMON AXIS SO AS TO UNWIND AND INCREASE THE INTERNAL DIAMETER OF SAID SPRING WHEREBY IT IS RELEASED FROM ITS GRIPPING RELATIONSHIP WITH SAID SHAFTS.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |