Patent US2649518A successfully refreshed from Google Patents.
US3333770A
Expired / Lapsed
US
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Vacuum position servo system
Assignee: Motors Liquidation Co
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Filing: 1966-07-22
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Granted: 1967-08-01
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Ronald D Freiberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:43
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A VACUUM POSITION SERVO SYSTEM COMPRISING A CONDUIT HAVING ENDS FIXED IN POSITION, VACUUM INLET MEANS AT ONE OF SAID ENDS INCLUDING AN INLET VALVE, SAID MEANS BEING CONNECTED TO A SOURCE OF VACUUM AND BEING MOVABLE WITH RESPECT TO SAID CONDUIT, MEANS FOR MOVING SAID VACUUM INLET MEANS IN ACCORDANCE WITH A VARIATION IN A CONDITION SUCH AS TEMPERATURE, A DIAPHRAGM MOTOR AT THE OTHER END OF SAID CONDUIT, A SPRING LOADED DIAPHRAGM IN SAID MOTOR AND MOVABLE WITH RESPECT TO SAID CONDUIT, A VENT VALVE ASSOCIATED WITH SAID MOTOR, AND WIRE EXTENDING THROUGH SAID CONDUIT AND CONNECTING SAID VALVES, SPRING MEANS URGING SAID VALVE AND WIRE AS A UNIT TOWARD POSITIONS AT WHICH SAID VALVES ARE CLOSED.
Claim 2
Dependent Claim
119 words
A VACUUM POSITION SERVO SYSTEM COMPRISING A CONDUIT HAVING ENDS FIXED IN POSITION, VACUUM INLET MEANS AT ONE OF SAID ENDS INCLUDING AN INLET VALVE, SAID MEANS BEING CONNECTED TO A SOURCE OF VACUUM AND BEING MOVABLE WITH RESPECT TO SAID CONDUIT, MEANS FOR MOVING SAID VACUUM INLET MEANS IN ACCORDANCE WITH A VARIATION IN A CONDITION SUCH AS TEMPERATURE, A DIAPHRAGM MOTOR AT THE OTHER END OF SAID CONDUIT, A SPRING LOADED DIAPHRAGM IN SAID MOTOR AND MOVABLE WITH RESPECT TO SAID CONDUIT, A VENT VALVE ASSOCIATED WITH SAID MOTOR, AND WIRE EXTENDING THROUGH SAID CONDUIT AND CONNECTING SAID VALVES, SPRING MEANS URGING SAID VALVE AND WIRE AS A UNIT TOWARD POSITIONS AT WHICH SAID VALVES ARE CLOSED.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |