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Patent US3567340A successfully refreshed from Google Patents.
US3567340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Individual
•
Filing: 1968-05-21
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Granted: 1971-03-02
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Expires: 1988-05-21
Abstract
Abstract A VARIABLE PITCH PROPELLER MECHANISM WHICH FITS OVER THE DRIVE SHAFT OF A CONVENTIONAL SINGLE ENDED POWER PLANT AND PERMITS BLADE ADJUSTMENT ADJACENT TO THE OUTPUT SHAFT. ONE END OF EACH PROPELLER BLADE CONTAINS A BEARING WHICH IS OFFSET FROM ITS AXIS OF PITCH ROTATION AND WHICH IS COUPLED INTO AN ANNULAR SLOT IN AN AXIALLY SLIDING BEARING RING. THE BEARING RING CONTAINS A CAM FOLLOWER WHICH TRACKS IN BOTH AN AXIAL SLOT AND A SPIRAL SLOT SO THAT ROTATION OF THE SPIRAL SLOT WILL AXIALLY DISPLACE THE BEARING RING SO AS TO MOVE THE OFFSET BEARINGS AND ROTATE THE PROPELLER BLADES.
Inventors
- 👤 Kurt Schneider
- 👤 George M Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:58
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/02; B63H3/04; B64; B64C; B64C11/00; B64C11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |