US3087554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller mechanical pitch stop lock and low pitch stop assembly
Assignee: Motors Liquidation Co
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Filing: 1960-07-11
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Granted: 1963-04-30
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Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Francis E Conn
- 👤 Calvin C Covert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:14
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/01; B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/325; B64C11/38; B64C11/385
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
IN A VARIABLE PITCH PROPELLER HAVING A HUB WITH A PLURALITY OF PROPELLER BLADES JOURNALLED THEREIN FOR ROTATION ABOUT THEIR LONGITUDINAL AXES AND PITCH CHANGING MEANS OPERATIVELY CONNECTED TO THE BLADES FOR VARYING THE PITCH POSITION THEREOF, MECHANICAL STOP MEANS OPERATIVELY ENGAGEABLE WITH SAID BLADES AT A PREDETERMINED PITCH POSITION THEREOF FOR PREVENTING PITCH CHANGING MOVEMENT IN A DECREASE PITCH DIRECTION, MECHANICAL LOCK MEANS OPERATIVELY ENGAGEABLE WITH SAID BLADES FOR PREVENTING PITCH CHANGING MOVEMENT THEREOF IN THE DECREASE PITCH DIRECTION, AND SINGLE SERVO MEANS RESPONSIVE TO FLUID UNDER DIFFERENT PRESSURES FOR SELECTIVELY RELEASING THE LOCK MEANS ALONE OR BOTH THE LOCK MEANS AND THE STOP MEANS.
References Cited (Backward Citations)
US2957528A
Cited
US2882975A
Cited
US2855057A
Cited
US2955663A
Cited
US3024848A
Cited
US3003567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |