US3082827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller
Assignee: RTX Corp
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Filing: 1962-04-20
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Granted: 1963-03-26
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Rosen George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:00
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26; B63H3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A SUPERCAVITATING MARINE PROPELLER HAVING RADIALLY EXTENDING BLADES, A HUB, EACH BLADE COMPRISING A MAIN BLADE PORTION, HAVING A SHARP LEADING AND A SHARP TRAILING EDGE, PIVOTALLY MOUNTED IN SAID HUB FOR PITCH CHANGING MOVEMENTS, A MINOR BLADE PORTION FIXED ON SAID HUB AND HAVING A SHARP LEADING EDGE AND A BLUNT TRAILING EDGE AND NESTING WITH SAID MAIN BLADE PORTION IN THE HIGH PITCH POSITION TO PROVIDE A COMPOSITE BLADE HAVING A SHARP LEADING EDGE AND A BLUNT TRAILING EDGE AND PROVIDING SEPARATED BLADE PORTIONS WITH A SLOT BETWEEN THE PORTIONS IN LOWER PITCH POSITIONS.
Claim 2
Dependent Claim
97 words
IN A SUPERCAVITATING MARINE PROPELLER HAVING RADIALLY EXTENDING BLADES, A HUB, EACH BLADE COMPRISING A MAIN BLADE PORTION, HAVING A SHARP LEADING AND A SHARP TRAILING EDGE, PIVOTALLY MOUNTED IN SAID HUB FOR PITCH CHANGING MOVEMENTS, A MINOR BLADE PORTION FIXED ON SAID HUB AND HAVING A SHARP LEADING EDGE AND A BLUNT TRAILING EDGE AND NESTING WITH SAID MAIN BLADE PORTION IN THE HIGH PITCH POSITION TO PROVIDE A COMPOSITE BLADE HAVING A SHARP LEADING EDGE AND A BLUNT TRAILING EDGE AND PROVIDING SEPARATED BLADE PORTIONS WITH A SLOT BETWEEN THE PORTIONS IN LOWER PITCH POSITIONS.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |