Patent US3304793A successfully refreshed from Google Patents.
US3304793A
Expired / Lapsed
US
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Transmission with bi-directional clutching mechanism
Assignee: Hitachi Ltd
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Filing: 1964-06-16
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Granted: 1967-02-21
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Nishimura Masaharu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/02; F16D13/025; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19442; Y10T74/19447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A TRANSMISSION HAVING A CLUTCH MECHANISM FOR COUPLING FIRST AND SECOND PARALLEL ROTARY DRIVE SHAFTS, THE COMBINATION OF PARTS CONSTITUTING A UNIVERSAL CLUTCH MECHANISM AND CONSISTING OF SAID FIRST AND SECOND SHAFTS BEING CYLINDRICAL AND DEVOID OF ANY TAPER; THREE EQUIDIAMETER ANNULAR COLLARS, DEVOID OF TAPERS AND DISPOSED CLOSELY AND COAXIALLY ABOUT THE FIRST SHAFT, THE OUTER TWO COLLARS BEING FIXED TO SAID SHAFT AND THE INSIDE COLLAR BEING FREE TO ROTATE ABOUT SAID SHAFT; MEANS FOR TRANSMITTING ROTATION FROM THE SECOND SHAFT TO SAID INSIDE COLLAR; TWO LIKE HELICAL SLUTCHING SPRING WITH THEIR WINDINGS FACING IN THE SAME DIRECTION, EACH FITTED FIRMLY ABOUT ONE OF SAID OUTER COLLARS AND THE END PART NEAREST THERETO OF THE INSIDE, COLLAR, AT LEAST ONE END OF SAID SPRINGS BEING ADAPTED TO BE CONTROLLABLY ACTUATED TO VARY THE CLUTCHING FORCE OF SAID SPRINGS; AND OUTSIDE ACTUATING MEANS FOR SAID SPRINGS.
Claim 2
Dependent Claim
148 words
IN A TRANSMISSION HAVING A CLUTCH MECHANISM FOR COUPLING FIRST AND SECOND PARALLEL ROTARY DRIVE SHAFTS, THE COMBINATION OF PARTS CONSTITUTING A UNIVERSAL CLUTCH MECHANISM AND CONSISTING OF SAID FIRST AND SECOND SHAFTS BEING CYLINDRICAL AND DEVOID OF ANY TAPER; THREE EQUIDIAMETER ANNULAR COLLARS, DEVOID OF TAPERS AND DISPOSED CLOSELY AND COAXIALLY ABOUT THE FIRST SHAFT, THE OUTER TWO COLLARS BEING FIXED TO SAID SHAFT AND THE INSIDE COLLAR BEING FREE TO ROTATE ABOUT SAID SHAFT; MEANS FOR TRANSMITTING ROTATION FROM THE SECOND SHAFT TO SAID INSIDE COLLAR; TWO LIKE HELICAL SLUTCHING SPRING WITH THEIR WINDINGS FACING IN THE SAME DIRECTION, EACH FITTED FIRMLY ABOUT ONE OF SAID OUTER COLLARS AND THE END PART NEAREST THERETO OF THE INSIDE, COLLAR, AT LEAST ONE END OF SAID SPRINGS BEING ADAPTED TO BE CONTROLLABLY ACTUATED TO VARY THE CLUTCHING FORCE OF SAID SPRINGS; AND OUTSIDE ACTUATING MEANS FOR SAID SPRINGS.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |