US3308677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission control system
Assignee: Motors Liquidation Co
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Filing: 1965-01-25
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Granted: 1967-03-14
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Henri J Van Lent
- 👤 Raymond P Michnay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:45
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H61/0276; F16H61/029; F16H59/00; F16H59/60; F16H59/62; Y; Y10; Y10S; Y10S74/00; Y10S74/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A TRANSMISSION FOR AN ENGINE DRIVEN VEHICLE OF THE TYPE HAVING AN ENGINE INTAKE MANIFOLD AND HAVING FLUID PRESSURE RESPONSIVE TRANSMISSION SERVOS FOR ESTABLISHING DIFFERENT TRANSMISSION DRIVE RATIOS, A FLUID PRESSURE SOURCE, MEANS FOR CONTROLLING THE TRANSMISSION DRIVE RATIO INCLUDING A SHIFT VALVE EFFECTIVE IN A DOWNSHIFT POSITION TO ESTABLISH A FIRST DRIVE RATIO AND MOVABLE TO AN UPSHIFT POSITION TO ESTABLISH A SECOND DRIVE RATIO, MEANS FOR BIASING SAID SHIFT VALVE FROM SAID DOWNSHIFT TO SAID UPSHIFT POSITION COMPRISING A VEHICLE SPEED RESPONSIVE GOVERNOR, A MODULATOR VALVE FOR DELIVERING VARIABLE PRESSURE TO SAID SHIFT VALVE TENDING TO BIAS SAID SHIFT VALVE FROM SAID UPSHIFT TO SAID DOWNSHIFT POSITION, SAID MODULATOR VALVE BEING RESPONSIVE TO ENGINE MANIFOLD VACUUM TO VARY THE PRESSURE DELIVERED THEREBY, AND AN ALTITUDE COMPENSATOR VALVE FOR DELIVERING A CONTROL PRESSURE TO SAID MODULATOR VALVE, THE PRESSURE DELIVERED BY SAID COMPENSATOR VALVE BEING VARIED IN RESPONSE TO CHANGES IN ABSOLUTE ATMOSPHERIC PRESSURE TO COMPENSATE FOR CHANGES IN ENGINE MANIFOLD VACUUM DUE TO CHANGES OF ABSOLUTE ATMOSPHERIC PRESSUR.
Claim 2
Dependent Claim
171 words
IN A TRANSMISSION FOR AN ENGINE DRIVEN VEHICLE OF THE TYPE HAVING AN ENGINE INTAKE MANIFOLD AND HAVING FLUID PRESSURE RESPONSIVE TRANSMISSION SERVOS FOR ESTABLISHING DIFFERENT TRANSMISSION DRIVE RATIOS, A FLUID PRESSURE SOURCE, MEANS FOR CONTROLLING THE TRANSMISSION DRIVE RATIO INCLUDING A SHIFT VALVE EFFECTIVE IN A DOWNSHIFT POSITION TO ESTABLISH A FIRST DRIVE RATIO AND MOVABLE TO AN UPSHIFT POSITION TO ESTABLISH A SECOND DRIVE RATIO, MEANS FOR BIASING SAID SHIFT VALVE FROM SAID DOWNSHIFT TO SAID UPSHIFT POSITION COMPRISING A VEHICLE SPEED RESPONSIVE GOVERNOR, A MODULATOR VALVE FOR DELIVERING VARIABLE PRESSURE TO SAID SHIFT VALVE TENDING TO BIAS SAID SHIFT VALVE FROM SAID UPSHIFT TO SAID DOWNSHIFT POSITION, SAID MODULATOR VALVE BEING RESPONSIVE TO ENGINE MANIFOLD VACUUM TO VARY THE PRESSURE DELIVERED THEREBY, AND AN ALTITUDE COMPENSATOR VALVE FOR DELIVERING A CONTROL PRESSURE TO SAID MODULATOR VALVE, THE PRESSURE DELIVERED BY SAID COMPENSATOR VALVE BEING VARIED IN RESPONSE TO CHANGES IN ABSOLUTE ATMOSPHERIC PRESSURE TO COMPENSATE FOR CHANGES IN ENGINE MANIFOLD VACUUM DUE TO CHANGES OF ABSOLUTE ATMOSPHERIC PRESSUR.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |