Patent US3163233A successfully refreshed from Google Patents.
US3163233A
Expired / Lapsed
US
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Aeronautical propeller having safety means for propeller feathering
Assignee: RTX Corp
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Filing: 1956-11-29
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Granted: 1964-12-29
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Expires: 1976-11-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond P Lambeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:47
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN AN AERONAUTICAL PROPELLER OF THE TYPE HAVING A PITCH CHANGING MECHANISM WHICH IS OPERABLE IN RESPONSE TO FLUID PRESSURE TO EFFECT A BLADE ANGLE CHANGE THROUGH HIGH PITCH INTO A FEATHERED POSITION, THE COMBINATION COMPRISING A SOURCE OF FLUID UNDER PRESSURE, AN INLET CONDUIT CONNECTED WITH THE PITCH CHANGING MECHANISM, FEATHER CONTROL MEANS CONNECTED BETWEEN THE SOURCE AND THE CONDUIT INCLUDING A FEATHERING VALVE MOVABLE TO ONE POSITION TO EFFECT DIRECT COMMUNICATION THEREBETWEEN AT SAID FEATHERING VALVE AND ALSO INCLUDING A VALVE ACTUATING CHAMBER, MECHANICAL VALVE MOVING MECHANISM CONNECTED WITH THE VALVE AND NORMALLY OPERABLE TO MOVE THE SAME TO THE SAID
Claim 2
Dependent Claim
103 words
IN AN AERONAUTICAL PROPELLER OF THE TYPE HAVING A PITCH CHANGING MECHANISM WHICH IS OPERABLE IN RESPONSE TO FLUID PRESSURE TO EFFECT A BLADE ANGLE CHANGE THROUGH HIGH PITCH INTO A FEATHERED POSITION, THE COMBINATION COMPRISING A SOURCE OF FLUID UNDER PRESSURE, AN INLET CONDUIT CONNECTED WITH THE PITCH CHANGING MECHANISM, FEATHER CONTROL MEANS CONNECTED BETWEEN THE SOURCE AND THE CONDUIT INCLUDING A FEATHERING VALVE MOVABLE TO ONE POSITION TO EFFECT DIRECT COMMUNICATION THEREBETWEEN AT SAID FEATHERING VALVE AND ALSO INCLUDING A VALVE ACTUATING CHAMBER, MECHANICAL VALVE MOVING MECHANISM CONNECTED WITH THE VALVE AND NORMALLY OPERABLE TO MOVE THE SAME TO THE SAID
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) | 1967-12-29 | 1968-06-29 | 1968-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-29 | 1972-06-29 | 1972-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-29 | 1976-06-29 | 1976-12-29 | $7700.00 | Window Closed / Lapsed |