Retention means
Abstract
Abstract THIS RELATES TO RENTENTION MEANS FOR SECURING A PROPELLER BLADE, HAVING A CYLINDRICAL SHANK, TO ITS HUB AND CONSISTING OF A SPLIT COLLAR (TWO HALVES) AND A RING COOPERATING THEREWITH FORMING A RIGID UNITARY-LIKE CONNECTION. CAM SURFACES ON THE INNER AND OUTER DIAMETER OF THE COLLAR, EACH HAVING PREDETERMINED SLOPES, BEAR AGAINST A COMPLEMENTARY SLOPE FORMED ON A BOSS FORMED ON THE FOOT OF THE PROPELLER BLADE AND THE OTHER BEARS AGAINST A COMPLEMENTARY SLOPE FORMED ON THE RING SO THAT THE WEDGING ACTION WHEN ASSEMBLED, FORCES THE INNER DIAMETER OF THE COLLAR TO BEAR AGAINST BOTH THE SLOPE ON THE BOSS AND THE CYLINDRICAL SURFACE OF THE BLADE. THE ANGLES OF THE SLOPES ARE SO SELECTED AS TO PREVENT ROCKING OR FRETING ACTION WHEN IN THE ASSEMBLED CONDITION AND TO PROVIDE LOAD PATHS TO ENHANCE THE STRUCTURAL SYSTEM.
Inventors
- 👤 Robert W Cornell
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |