Patent US4320403A successfully refreshed from Google Patents.
Patent US3141387A successfully refreshed from Google Patents.
US3141387A
Expired / Lapsed
US
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Twin piston rotary actuators
Assignee: Motors Liquidation Co
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Filing: 1962-05-08
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Granted: 1964-07-21
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Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 Howard M Geyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:59
CPC Classifications
B; B64; B64C; B64C13/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A ROTARY ACTUATOR COMPRISING, A CYLINDER, A ROTARY OUTPUT MEMBER JOURNALLED IN SAID CYLINDER, A PAIR OF RECIPROCABLE PISTONS DISPOSED IN SAID CYLINDER HAVING OPERATIVE HELICAL CONNECTIONS WITH SAID OUTPUT MEMBER FOR IMPARTING ROTATION THERETO UPON RECIPROCATION OF EITHER PISTON, INDEPENDENT MEANS OPERABLE TO EFFECT MOVEMENT OF EACH PISTON IN ONE DIRECTION, COMMON MEANS FOR EFFECTING MOVEMENT OF SAID PISTONS IN THE OPPOSITE DIRECTION, AND A POSITIVE MECHANICAL STOP ENGAGEABLE WITH ONE OF SAID PISTONS TO LIMIT RECIPROCABLE MOVEMENT THEREOF IN SAID ONE DIRECTION TO DETERMINE AN INTERMEDIATE ANGULAR POSITION OF SAID OUTPUT MEMBER.
Claim 2
Dependent Claim
94 words
A ROTARY ACTUATOR COMPRISING, A CYLINDER, A ROTARY OUTPUT MEMBER JOURNALLED IN SAID CYLINDER, A PAIR OF RECIPROCABLE PISTONS DISPOSED IN SAID CYLINDER HAVING OPERATIVE HELICAL CONNECTIONS WITH SAID OUTPUT MEMBER FOR IMPARTING ROTATION THERETO UPON RECIPROCATION OF EITHER PISTON, INDEPENDENT MEANS OPERABLE TO EFFECT MOVEMENT OF EACH PISTON IN ONE DIRECTION, COMMON MEANS FOR EFFECTING MOVEMENT OF SAID PISTONS IN THE OPPOSITE DIRECTION, AND A POSITIVE MECHANICAL STOP ENGAGEABLE WITH ONE OF SAID PISTONS TO LIMIT RECIPROCABLE MOVEMENT THEREOF IN SAID ONE DIRECTION TO DETERMINE AN INTERMEDIATE ANGULAR POSITION OF SAID OUTPUT MEMBER.
References Cited (Backward Citations)
US2970574A
Cited
US3003470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |