US3336820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Twin Disc Inc
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Filing: 1965-05-04
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Granted: 1967-08-22
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Hilpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:30
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; B; B66; B66D; B66D1/00; B66D1/02; B66D1/14; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0158; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19149; Y10T74/19158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
FOR USE WITH APPARATUS HAVING MEANS FOR HOISTING AND LOWERING A LOAD, A POWER TRANSMISSION CONNECTIBLE TO A POWER SOURCE AND INCLUDING HOISTING AND LOWERING POWER TRAINS HAVING A COMMON OUTPUT ARRANGED FOR CONNECTION TO THE INPUT OF THE APPARATUS, THE HOISTING AND LOWERING POWER TRAINS HAVING COMMON THERETO AND IN SERIES POWER FLOW RELATION A HYDRAULICALLY CONTROLLED, FRICTION POWER CLUTCH AND A HYDRAULIC TORQUE CONVERTER, THE LOWERING POWER TRAIN ADDITIONALLY INCLUDING A REVERSE GEAR WHOSE OUTPUT IS CONNECTED TO THE COMMON OUTPUT OF THE POWER TRAINS AND WHOSE INPUT IS CONNECTIBLE TO THE YHDRAULIC TORQUE CONVERTER, AND CLUTCH MEANS OPERABLE TO SELECTIVELY CONNECT THE CONVERTER DIRECTLY WITH THE COMMON OUTPUT FOR HOISTING AND THE CONVERTER WITH THE COMMON OUTPUT THROUGH THE REVERSE GEAR FOR LOWERING.
Claim 2
Dependent Claim
126 words
FOR USE WITH APPARATUS HAVING MEANS FOR HOISTING AND LOWERING A LOAD, A POWER TRANSMISSION CONNECTIBLE TO A POWER SOURCE AND INCLUDING HOISTING AND LOWERING POWER TRAINS HAVING A COMMON OUTPUT ARRANGED FOR CONNECTION TO THE INPUT OF THE APPARATUS, THE HOISTING AND LOWERING POWER TRAINS HAVING COMMON THERETO AND IN SERIES POWER FLOW RELATION A HYDRAULICALLY CONTROLLED, FRICTION POWER CLUTCH AND A HYDRAULIC TORQUE CONVERTER, THE LOWERING POWER TRAIN ADDITIONALLY INCLUDING A REVERSE GEAR WHOSE OUTPUT IS CONNECTED TO THE COMMON OUTPUT OF THE POWER TRAINS AND WHOSE INPUT IS CONNECTIBLE TO THE YHDRAULIC TORQUE CONVERTER, AND CLUTCH MEANS OPERABLE TO SELECTIVELY CONNECT THE CONVERTER DIRECTLY WITH THE COMMON OUTPUT FOR HOISTING AND THE CONVERTER WITH THE COMMON OUTPUT THROUGH THE REVERSE GEAR FOR LOWERING.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |