US3587765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration control for hydraulic transmissions
Assignee: Cessna Aircraft Co
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Filing: 1968-11-21
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Granted: 1971-06-28
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Expires: 1988-11-21
Abstract
Abstract A CONTROL DEVICE FOR USE WITH A VEHICULAR HYDROSTATIC DRIVE WHICH LIMITS THE RATE OF CHANGE OF SPEED OF HYDROSTATIC TRANSMISSION. A FLUID PRESSURE ACTUATED MECHANISM IS OPERATIVELY CONNECTED TO THE TRANSMISSION TO CHANGE THE SPEED OF THE TRANSMISSION, AND THE RATE OF OPERATION OF THE MECHANISM IS DEPENDENT UPON THE RATE OF FLUID FLOW THERETO. AN ACCELERATION SENSOR MEASURES THE RATE OF ACCELERATION OR DECELERATION OF THE VEHICLE AND OPERATES A VARIABLE FLOW RESTRICTOR PLACED IN A FLOW LINE WHICH CONDUCTS FLUID FROM A PRESSURE SOURCE TO THE FLUID PRESSURE ACTUATED MECHANISM.
Inventors
- 👤 James W Mcfarland
- 👤 Wendell E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:23
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/433; F16H61/46; F16H61/47; B; B60; B60W; B60W2520/00; B60W2520/10; B60W2520/105; F16H59/00; F16H59/48; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0898; Y10T137/0923
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |