US3143859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic apparatus
Assignee: Dowty Hydraulic Units Ltd
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Filing: 1963-03-07
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Granted: 1964-08-11
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Thoma Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:59
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/04; F16H39/06; F16H39/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A HYDROSTATIC TRANSMISSION INCLUDING A PISTON PUMP UNIT, A PISTON MOTOR UNIT, A MAIN LINK PIVOTALLY CONNECTED TO EACH UNIT IN SUCH A MANNER AS TO CONTROL MOVEMENT OF ONE UNIT AS A RESULT OF MOVEMENT OF THE OTHER UNIT, AND AT LEAST ONE SLAVE LINK PIVOTALLY CONNECTED TO EACH UNIT IN SUCH A MANNER THAT SUBSTANTIALLY NO FORCE IS TRANSMITTED FROM ONE UNIT TO THE OTHER UNIT BY THE SLAVE LINK, EACH SLAVE LINK INCLUDING A PASSAGE FOR TRANSFERRING LIQUID FROM ONE UNIT TO THE OTHER UNIT.
Claim 2
Dependent Claim
88 words
A HYDROSTATIC TRANSMISSION INCLUDING A PISTON PUMP UNIT, A PISTON MOTOR UNIT, A MAIN LINK PIVOTALLY CONNECTED TO EACH UNIT IN SUCH A MANNER AS TO CONTROL MOVEMENT OF ONE UNIT AS A RESULT OF MOVEMENT OF THE OTHER UNIT, AND AT LEAST ONE SLAVE LINK PIVOTALLY CONNECTED TO EACH UNIT IN SUCH A MANNER THAT SUBSTANTIALLY NO FORCE IS TRANSMITTED FROM ONE UNIT TO THE OTHER UNIT BY THE SLAVE LINK, EACH SLAVE LINK INCLUDING A PASSAGE FOR TRANSFERRING LIQUID FROM ONE UNIT TO THE OTHER UNIT.
References Cited (Backward Citations)
US2872876A
Cited
US2967395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |