Patent US3303889A successfully refreshed from Google Patents.
US3303889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller blade and hub assembly
Assignee: Curtiss Wright Corp
•
Filing: 1966-02-15
•
Granted: 1967-02-14
•
Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 William E Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:06
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN COMBINATION, A PROPELLER BLADE OF REINFORCED PLASTIC MATERIAL HAVING A HOLLOW SHANK, A PROPELLER HUB INCLUDING A GENERALLY RADIALLY EXTENDING HOLLOW PROJECTION WHICH EXTENDS INTO THE SHANK OF THE BLADE, AND A BLADE HOLDING NUT HELD AGAINST MOVEMENT OUTWARDLY FROM SAID PROJECTION, THE BLADE INCLUDING A FIRST SHANK PORTION WHICH TAPERS INWARDLY TOWARD THE HUB, A SECOND PORTION WITHIN THE FIRST PORTION IN ENGAGEMENT WITH THE FIRST PORTION AND THE NUT, AND A THIRD PORTION EXTENDING AROUND BLADE TO THE NUT, AND A THIRD PORTION EXTENDING AROUND THE FIRST PORTION TO PREVENT THE FIRST PORTION FROM FLARING OUTWARDLY FROM THE HUB PROJECTION.
Claim 2
Dependent Claim
103 words
IN COMBINATION, A PROPELLER BLADE OF REINFORCED PLASTIC MATERIAL HAVING A HOLLOW SHANK, A PROPELLER HUB INCLUDING A GENERALLY RADIALLY EXTENDING HOLLOW PROJECTION WHICH EXTENDS INTO THE SHANK OF THE BLADE, AND A BLADE HOLDING NUT HELD AGAINST MOVEMENT OUTWARDLY FROM SAID PROJECTION, THE BLADE INCLUDING A FIRST SHANK PORTION WHICH TAPERS INWARDLY TOWARD THE HUB, A SECOND PORTION WITHIN THE FIRST PORTION IN ENGAGEMENT WITH THE FIRST PORTION AND THE NUT, AND A THIRD PORTION EXTENDING AROUND BLADE TO THE NUT, AND A THIRD PORTION EXTENDING AROUND THE FIRST PORTION TO PREVENT THE FIRST PORTION FROM FLARING OUTWARDLY FROM THE HUB PROJECTION.
References Cited (Backward Citations)
US2054810A
Cited
US2706007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |