US3613469A
Expired / Lapsed
US
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Power transmission of the hydraulically actuated,friction clutch type
Assignee: Twin Disc Inc
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Filing: 1970-04-29
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Granted: 1971-10-19
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Expires: 1990-04-29
Abstract
Abstract A POWER TRANSMISSION INCLUDING FORWARD AND REVERSE SHAFTS EACH HAVING A HYDRAULICALLY ACTUATED CLUTCH WHICH IS CONTROLLED BY A CENTRIFUGAL VALVE. THE TRANSMISSION FINDS PARTICULAR UTILITY IN REGULATING THE SPEED, ROTATIONAL DIRECTION, AND POWER DELIVERED TO THE PROPULSION DRIVE IN A MARINE VESSEL.
Inventors
- 👤 Richard C Mcroberts
- 👤 Bruce C Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:05
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H23/08; B63H21/00; B63H21/21; B63H21/213; B63H21/22; F; F16; F16D; F16D25/00; F16D25/10; B63H23/30; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19386; Y10T74/19409; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |