Patent US3226031A successfully refreshed from Google Patents.
US3226031A
Expired / Lapsed
US
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Induction propeller
Assignee: Individual
•
Filing: 1962-10-31
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Granted: 1965-12-28
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Expires: 1982-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond Prunty Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/384; F04D29/386; B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/08; B64C11/10; B64C11/16; B64C11/18; F04D29/18; F04D29/181; Y; Y10; Y10S; Y10S416/00; Y10S416/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A SCREW PROPELLER, A BLADE OF PRONOUNCED FORWARDLY OBLIQUE HELICAL FORM HAVING SUBSTANTIALLY CONSTANT HELICAL PITCH, A ROOT END ON SAID BLADE, THE RADIAL GENERATRIX OF SAID BLADE HAVING PRONOUNCED FORWARD RAKE, SAID BLADE BEING SWEPTBACK MARKEDLY ALONG ITS GENERATING HELIX THEREBY SITAUTING THE TIP END OF SAID BLADE ON ONE POSITION OF THE RADIAL GENERATRIX SIDE-REARWARDLY ALONG THE HELIX FROM ANOTHER POSITION OF THE RADIAL GENERATRIX ON SAID ROOT OF SAID BLADE, SUCH THAT THE FORWARD RAKE OF SID GENERATRIX IS MUCH GREATER THAN THE FORWARD RAKE OF SAID BLADE.
Claim 2
Dependent Claim
92 words
IN A SCREW PROPELLER, A BLADE OF PRONOUNCED FORWARDLY OBLIQUE HELICAL FORM HAVING SUBSTANTIALLY CONSTANT HELICAL PITCH, A ROOT END ON SAID BLADE, THE RADIAL GENERATRIX OF SAID BLADE HAVING PRONOUNCED FORWARD RAKE, SAID BLADE BEING SWEPTBACK MARKEDLY ALONG ITS GENERATING HELIX THEREBY SITAUTING THE TIP END OF SAID BLADE ON ONE POSITION OF THE RADIAL GENERATRIX SIDE-REARWARDLY ALONG THE HELIX FROM ANOTHER POSITION OF THE RADIAL GENERATRIX ON SAID ROOT OF SAID BLADE, SUCH THAT THE FORWARD RAKE OF SID GENERATRIX IS MUCH GREATER THAN THE FORWARD RAKE OF SAID BLADE.
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |