US3230699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission
Assignee: Sundstrand Corp
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Filing: 1964-01-21
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Granted: 1966-01-25
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Hann
- 👤 Jr Harry C Moon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/47; F16H61/42; F16H61/423; F16H61/465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A VEHICLE DRIVE SYSTEM, IN COMBINATION, A VARIABLE DISPLACEMENT PUMP, A VARIABLE DISPLACEMENT MOTOR, CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET AND CONNECTING THE MOTOR OUTLET WITH THE PUMP INLET, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE PUMP, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE MOTOR, AN ENGINE FOR DRIVING THE PUMP, MEANS FOR CONTROLLING ENGINE SPEED, MEANS FOR SENSING ENGINE SPEED, AND MEANS RESPONSIVE TO SAID SENSING MEANS FOR CONTROLLING THE FLOW OF FLUID UNDER PRESSURE RELATIVE TO BOTH DISPLACEMENT VARYING MEANS TO INCREASE PUMP DISPLACEMENT AND REDUCE MOTOR DISPLACEMENT TO BRING THE TRANSMISSION UP TO SPEED AS THE ENGINE IS BROUGHT UP TO SPEED.
Claim 2
Dependent Claim
112 words
IN A VEHICLE DRIVE SYSTEM, IN COMBINATION, A VARIABLE DISPLACEMENT PUMP, A VARIABLE DISPLACEMENT MOTOR, CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET AND CONNECTING THE MOTOR OUTLET WITH THE PUMP INLET, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE PUMP, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE MOTOR, AN ENGINE FOR DRIVING THE PUMP, MEANS FOR CONTROLLING ENGINE SPEED, MEANS FOR SENSING ENGINE SPEED, AND MEANS RESPONSIVE TO SAID SENSING MEANS FOR CONTROLLING THE FLOW OF FLUID UNDER PRESSURE RELATIVE TO BOTH DISPLACEMENT VARYING MEANS TO INCREASE PUMP DISPLACEMENT AND REDUCE MOTOR DISPLACEMENT TO BRING THE TRANSMISSION UP TO SPEED AS THE ENGINE IS BROUGHT UP TO SPEED.
References Cited (Backward Citations)
US2255783A
Cited
GB854219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |