US3136229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power servo construction
Assignee: Motors Liquidation Co
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Filing: 1962-06-20
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Granted: 1964-06-09
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Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Robert H Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A ROLLING DIAPHRAGM SERVOMOTOR HAVING A PISTON AND A DIAPHRAGM AND A HOUSING DIVIDED INTO DIFFERENTIAL PRESSURE CHAMBERS BY SAID DIAPHRAGM AND PISTON, DIAPHRAGM HOLDING MEANS FOR HOLDING SAID DIAPHRAGM ON SAID PISTON AND COMPRISING, AN ANNULAR CHANNEL FORMED ON SAID PISTON, AN ANNULAR DISC-LIKE PISTON SECTION EXTENDING RADIALLY OUTWARD FROM ONE WALL OF SAID CHANNEL AND HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES EXTENDING THERETHROUGH AXIALLY OF SAID PISTON TO INTERCONNECT SAID DIFFERENTIAL PRESSURE CHAMBERS, RAISED PORTIONS FORMED ON
Claim 2
Dependent Claim
81 words
IN A ROLLING DIAPHRAGM SERVOMOTOR HAVING A PISTON AND A DIAPHRAGM AND A HOUSING DIVIDED INTO DIFFERENTIAL PRESSURE CHAMBERS BY SAID DIAPHRAGM AND PISTON, DIAPHRAGM HOLDING MEANS FOR HOLDING SAID DIAPHRAGM ON SAID PISTON AND COMPRISING, AN ANNULAR CHANNEL FORMED ON SAID PISTON, AN ANNULAR DISC-LIKE PISTON SECTION EXTENDING RADIALLY OUTWARD FROM ONE WALL OF SAID CHANNEL AND HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES EXTENDING THERETHROUGH AXIALLY OF SAID PISTON TO INTERCONNECT SAID DIFFERENTIAL PRESSURE CHAMBERS, RAISED PORTIONS FORMED ON
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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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |