Patent US3228197A successfully refreshed from Google Patents.
US3228197A
Expired / Lapsed
US
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Altitude compensated fail safe pressure supply mechanism
Assignee: Motors Liquidation Co
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Filing: 1964-11-02
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Granted: 1966-01-11
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Roderick G Tipping
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:30
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/14; F16H59/26; F16H59/30; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A TRANSMISSION CONTROL SYSTEM FOR AN ENGINE DRIVEN VEHICLE, MEANS FOR PROVIDING A REGULATED FLUID PRESSURE SOURCE, A MODULATOR VALVE SUPPLIED WITH FLUID FROM SAID SOURCE AND ADAPTED TO DELIVER A VARIABLE CONTROL PRESSURE, MODULATOR MEANS CONTROLLING SAID MODULATOR VALVE INCLUDING FIRST MOTOR MEANS HAVING AN ESSENTIALLY CONSTANT REFERENCE PRESSURE AND RESPONSIVE TO THE DIFFERENCE IN PRESSURE BETWEEN SAID REFERENCE PRESSURE AND ATMOSPHERIC PRESSURE TO PROVIDE A FORCE TO CONTROL SAID MODULATOR VALVE, A SECOND MOTOR MEANS CONNECTED TO SAID ENGINE AS A SOURCE OF VACUUM AND RESPONSIVE TO THE DIFFERENCE BETWEEN ATMOSPHERIC PRESSURE AND ENGINE VACUUM TO PROVIDE A SECOND FORCE TO CONTROL SAID MODULATOR VALVE, BIASING MEANS EFFECTING AT TIMES TO CONTROL SAID MODULATOR VALVE, MEANS NORMALLY EFFECTIVE TO DISABLE SAID BIASING MEANS, SAID LAST-MENTIONED MEANS BEING AUTOMATICALLY OPERABLE UPON LOSS OF SAID REFERENCE PRESSURE IN SAID FIRST MOTOR FORCE ON SAID MODULATOR VALVE.
Claim 2
Dependent Claim
147 words
IN A TRANSMISSION CONTROL SYSTEM FOR AN ENGINE DRIVEN VEHICLE, MEANS FOR PROVIDING A REGULATED FLUID PRESSURE SOURCE, A MODULATOR VALVE SUPPLIED WITH FLUID FROM SAID SOURCE AND ADAPTED TO DELIVER A VARIABLE CONTROL PRESSURE, MODULATOR MEANS CONTROLLING SAID MODULATOR VALVE INCLUDING FIRST MOTOR MEANS HAVING AN ESSENTIALLY CONSTANT REFERENCE PRESSURE AND RESPONSIVE TO THE DIFFERENCE IN PRESSURE BETWEEN SAID REFERENCE PRESSURE AND ATMOSPHERIC PRESSURE TO PROVIDE A FORCE TO CONTROL SAID MODULATOR VALVE, A SECOND MOTOR MEANS CONNECTED TO SAID ENGINE AS A SOURCE OF VACUUM AND RESPONSIVE TO THE DIFFERENCE BETWEEN ATMOSPHERIC PRESSURE AND ENGINE VACUUM TO PROVIDE A SECOND FORCE TO CONTROL SAID MODULATOR VALVE, BIASING MEANS EFFECTING AT TIMES TO CONTROL SAID MODULATOR VALVE, MEANS NORMALLY EFFECTIVE TO DISABLE SAID BIASING MEANS, SAID LAST-MENTIONED MEANS BEING AUTOMATICALLY OPERABLE UPON LOSS OF SAID REFERENCE PRESSURE IN SAID FIRST MOTOR FORCE ON SAID MODULATOR VALVE.
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |