Patent US3247669A successfully refreshed from Google Patents.
US3247669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission
Assignee: Sundstrand Corp
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Filing: 1964-04-23
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Granted: 1966-04-26
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Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Hann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/472; F16H61/42; F16H61/421; F16H61/431
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
IN A HYDROSTATIC TRANSMISSION, IN COMBINATION, A PUMP HAVING AN OUTLET, A MOTOR HAVING AN INLET, CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET, MEANS FOR VARYING THE DISPLACEMENT OF THE PUMP AND THE MOTOR, AN ENGINE FOR DRIVING THE PUMP, MEANS FOR SUPPLYING CONTROL FLUID UNDER PRESSURE PROPORTIONAL TO ENGINE SPEED, AND MEANS FOR CONTROLLING THE DISPLACEMENT VARYING MEANS TO BRING THE TRANSMISSION UP TO SPEED, AND MEANS FOR SENSING THE PRESSURE OF SAID CONTROL FLUID AND CONTROLLING THE DISPLACEMENT VARYING MEANS TO INCREASE MOTOR DISPLACEMENT AS THE ENGINE SPEED DECREASES DUE TO INCREASED LOAD.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |