Patent US3331446A successfully refreshed from Google Patents.
US3331446A
Expired / Lapsed
US
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Controllable pitch propellers
Assignee: Individual
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Filing: 1966-10-17
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Granted: 1967-07-18
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Expires: 1986-10-17
Abstract
No abstract record available.
Inventors
- 👤 Feroy Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B63; B63H; B63H3/00; B63H3/02; B63H3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A CONTROLLABLE PITCH PROPELLER HAVING A HUB AND BLADES RADIAL THERETO: FLANGE ON EACH OF SAID BLADES, SERRATIONS ON THE INNER FACE OF EACH FLANGE, AND MECHAMISM FOR ROTATING SAID FLANGES AND BLADES TO CONTROL THE PITCH TO ANY DESIRED POSITION, FORWARD, NEUTRAL, OR REVERSE; SAID MECHANISM INCLUDING AN AXIALLY MOVABLE CONTROL MEMBER, A SET OF BLOCKS AXIALLY MOVABLE WITH SAID CONTROL MEMBER. SERRATIONS ON THE OUTER FACE OF EACH OF SAID BLOCKS, A SET OF FLOATING PLATES, CIRCULAR-ARC SERRATIONS ON ONE SIDE OF EACH FLOATING PLATE AND STRAIGHT SERRATIONS ON THE OTHER SIDE OF EACH FLOATING PLATE, THE FLOATING-PLATE SERRATIONS OPERABLY MESHING WITH THE CORRESPONDING SERRATIONS ON SAID BLADE FLANGES AND ON SAID AXIALLY MOVABLE BLOCKS.
Claim 2
Dependent Claim
118 words
IN A CONTROLLABLE PITCH PROPELLER HAVING A HUB AND BLADES RADIAL THERETO: FLANGE ON EACH OF SAID BLADES, SERRATIONS ON THE INNER FACE OF EACH FLANGE, AND MECHAMISM FOR ROTATING SAID FLANGES AND BLADES TO CONTROL THE PITCH TO ANY DESIRED POSITION, FORWARD, NEUTRAL, OR REVERSE; SAID MECHANISM INCLUDING AN AXIALLY MOVABLE CONTROL MEMBER, A SET OF BLOCKS AXIALLY MOVABLE WITH SAID CONTROL MEMBER. SERRATIONS ON THE OUTER FACE OF EACH OF SAID BLOCKS, A SET OF FLOATING PLATES, CIRCULAR-ARC SERRATIONS ON ONE SIDE OF EACH FLOATING PLATE AND STRAIGHT SERRATIONS ON THE OTHER SIDE OF EACH FLOATING PLATE, THE FLOATING-PLATE SERRATIONS OPERABLY MESHING WITH THE CORRESPONDING SERRATIONS ON SAID BLADE FLANGES AND ON SAID AXIALLY MOVABLE BLOCKS.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |