Patent US2365571A successfully refreshed from Google Patents.
Patent US3090445A successfully refreshed from Google Patents.
US3090445A
Expired / Lapsed
US
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Simultaneous feather and pitch lock actuator
Assignee: RTX Corp
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Filing: 1960-12-19
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Granted: 1963-05-21
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Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richard L Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:53
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN AN ENGINE DRIVEN PROPELLER HAVING A DECOUPLER DEVICE INTERPOSED BETWEEN THE ENGINE AND PROPELLER THE COMBINATION COMPRISING VARIABLE PITCH PROPELLER BLADES, A PITCH LOCK DEVICE INCLUDING INDEPENDENT COORDINATING MEANS, A FEATHERING MECHANISM INCLUDING INDEPENDENT COORDINATING MEANS, OVERRIDING MEANS FOR ACTUATING THE PITCH LOCK DEVICE AND OPERABLE INDEPENDENTLY OF SAID PITCH LOCK COORDINATING MEANS, SAID INDEPENDENT FEATHER COORDINATING MEANS INCLUDING A CONTROL VALVE FOR ADVANCING THE PITCH TO A HIGHER BLADE ANGLE, SAID CONTROL VALVE PRODUCING A SIGNAL, MEANS RESPONSIVE TO SAID SIGNAL FOR CONTROLLING SAID OVERRIDING MEANS, WHEN THE CONTROL VALVE FAILS TO ADVANCE THE PITCH TO A HIGHER BLADE ANGLE.
Claim 2
Dependent Claim
102 words
IN AN ENGINE DRIVEN PROPELLER HAVING A DECOUPLER DEVICE INTERPOSED BETWEEN THE ENGINE AND PROPELLER THE COMBINATION COMPRISING VARIABLE PITCH PROPELLER BLADES, A PITCH LOCK DEVICE INCLUDING INDEPENDENT COORDINATING MEANS, A FEATHERING MECHANISM INCLUDING INDEPENDENT COORDINATING MEANS, OVERRIDING MEANS FOR ACTUATING THE PITCH LOCK DEVICE AND OPERABLE INDEPENDENTLY OF SAID PITCH LOCK COORDINATING MEANS, SAID INDEPENDENT FEATHER COORDINATING MEANS INCLUDING A CONTROL VALVE FOR ADVANCING THE PITCH TO A HIGHER BLADE ANGLE, SAID CONTROL VALVE PRODUCING A SIGNAL, MEANS RESPONSIVE TO SAID SIGNAL FOR CONTROLLING SAID OVERRIDING MEANS, WHEN THE CONTROL VALVE FAILS TO ADVANCE THE PITCH TO A HIGHER BLADE ANGLE.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |