US3621735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically operated hydraulic controls
Assignee: Ford Motor Co
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Filing: 1969-12-15
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Granted: 1971-11-23
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Expires: 1989-12-15
Abstract
Abstract A PRESSURFE REGULATOR VALVE SYSTEM FORF AN AUTOMATIC CONTROL VALVE CIRCUIT IN A MULTIPLE RATIO POWER TRANSMISSION COMPRISING A PRESSURE REGULATOR VALVE SITUATED IN THE VALVE CIRCUIT WITH A PRESSURE SOURCE, AN ELECTRICAL PULSE VALVE WHICH ESTABLISHES A PREDETERMINED PRESSURE ON A MOVABLE VALVE ELEMENT OF THE REGULATOR VALVE, THE MAGNITUDE OF THE PRESSURE BEING DETERMINED BY THE FREQUENCY OF ELECTRICAL VOLTAGE PULSES APPLIED TO THE PULSE VALVE, THE FREQUENCY IN TURN BEING CONTROLLED BY ELECTRONIC SENSORS THAT MEASURE TRANSMISSION OUTPUT SHAFT SPEED AND POWER INTPUT SHAFT TORQUE.
Inventors
- 👤 George E Lemieux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/0021; F16H61/02; F16H61/0202; F16H61/0251; F16H2061/0255
Claims Analysis
Total Claims: 0
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |