Patent US3293944A successfully refreshed from Google Patents.
US3293944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Twin Disc Inc
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Filing: 1964-05-19
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Granted: 1966-12-27
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Expires: 1984-05-19
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Hilpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:06
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; B; B66; B66D; B66D1/00; B66D1/02; B66D1/08; F16H45/00; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0133; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19149; Y10T74/19158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 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 POWER TRAIN INCLUDING IN SERIES POWER FLOW RELATION A FIRST HYDRAULICALLY CONTROLLED FRICTION CLUTCH FOR PROVIDING CONNECTION WITH THE POWER SOURCE, A HYDRAULIC TORQUE CONVERTER AND THE COMMON OUTPUT, AND THE LOWERING POWER TRAIN INCLUDING IN SERIES POWER FLOW RELATION A REVERSE GEAR CONNECTED TO THE POWER SOURCE, A SECOND HYDRAULICALLY CONTROLLED FRICTION CLUTCH AND THE COMMON OUTPUT, MEANS FOR SELECTIVELY DETERMINING THE ENGAGEMENT OF EITHER CLUTCH INCLUDING MEANS FOR INFINITELY MODULATING EITHER ENGAGEMENT TO PROVIDE ANY DESIRED ROTATIVE SPEED OF THE COMMON OUTPUT IN EITHER DIRECTION.
Claim 2
Dependent Claim
129 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 POWER TRAIN INCLUDING IN SERIES POWER FLOW RELATION A FIRST HYDRAULICALLY CONTROLLED FRICTION CLUTCH FOR PROVIDING CONNECTION WITH THE POWER SOURCE, A HYDRAULIC TORQUE CONVERTER AND THE COMMON OUTPUT, AND THE LOWERING POWER TRAIN INCLUDING IN SERIES POWER FLOW RELATION A REVERSE GEAR CONNECTED TO THE POWER SOURCE, A SECOND HYDRAULICALLY CONTROLLED FRICTION CLUTCH AND THE COMMON OUTPUT, MEANS FOR SELECTIVELY DETERMINING THE ENGAGEMENT OF EITHER CLUTCH INCLUDING MEANS FOR INFINITELY MODULATING EITHER ENGAGEMENT TO PROVIDE ANY DESIRED ROTATIVE SPEED OF THE COMMON OUTPUT IN EITHER DIRECTION.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |