Patent US4819845A successfully refreshed from Google Patents.
US3129798A
Expired / Lapsed
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Cylinder clutch
Assignee: RABINOW ENGINEERING CO Inc
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Filing: 1961-05-29
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Granted: 1964-04-21
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Rabinow Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:26
CPC Classifications
F; F16; F16D; F16D51/00; F16D27/00; F16D27/02; F16D49/00; F16D2027/005; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AN ELECTROMAGNETIC COUPLING COMPRISING A CYLINDRICAL ELECTROMAGNET PROVIDED WITH A SURFACE, AND A CYLINDRICAL DEVICE HAVING A PLURALITY OF FLEXIBLE ELASTIC FINGERS PROVIDED WITH INNER ENDS, SAID FINGERS BEING OF A LENGTH AT LEAST TWICE THE DIAMETER OF SAID DEVICE AND FLEXIBLE FROM THE INNER END OF EACH FINGER TO MOVE EASILY TOWARD AND AWAY FROM SAID ELECTROMAGNET, SAID ELECTROMAGNET AND DEVICE BEING NESTED, MEANS FOR ENERGIZING SAID ELECTROMAGNET AND THEREBY MAGNETICALLY ATTRACTING THE FINGERS
Claim 2
Dependent Claim
75 words
AN ELECTROMAGNETIC COUPLING COMPRISING A CYLINDRICAL ELECTROMAGNET PROVIDED WITH A SURFACE, AND A CYLINDRICAL DEVICE HAVING A PLURALITY OF FLEXIBLE ELASTIC FINGERS PROVIDED WITH INNER ENDS, SAID FINGERS BEING OF A LENGTH AT LEAST TWICE THE DIAMETER OF SAID DEVICE AND FLEXIBLE FROM THE INNER END OF EACH FINGER TO MOVE EASILY TOWARD AND AWAY FROM SAID ELECTROMAGNET, SAID ELECTROMAGNET AND DEVICE BEING NESTED, MEANS FOR ENERGIZING SAID ELECTROMAGNET AND THEREBY MAGNETICALLY ATTRACTING THE FINGERS
References Cited (Backward Citations)
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |