US3081826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ship propeller
Assignee: Individual
•
Filing: 1960-01-27
•
Granted: 1963-03-19
•
Expires: 1980-01-27
Abstract
No abstract record available.
Inventors
- 👤 Loiseau Christophe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:20
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
A SHIP PROPELLER COMPRISING A HUB HAVING A FORWARD AND REARWARD END AND A PLURALITY OF SUBSTANTIALLY IDENTICAL BLADES EXTENDING HELICALLY FROM SAID HUB AROUND THE AXIS THEREOF, EACH BLADE HAVING ITS LEADING EDGE STARTING FROM A POINT NEAR THE LONGITUDINAL FORWARD END OF THE HUB AND ITS TRAILING EDGE STARTING FROM A POINT NEAR THE REARWARD LONGITUDINAL END OF THE HUB, EACH LEADING EDGE BEING INSCRIBED IN A CONE HAVING ITS APEX DIRECTED FORWARD AND ITS AXIS IN COINCIDENCE WITH THE AXIS OF THE HUB AND EACH TRAILING EDGE HAVING THE INNER PORTION THEREOF OF CONCAVE CURVATURE AND THE OUTER PORTION OF CONVEX CURVATURE, AND THE PRESSURE SURFACE OF EACH BLADE COMPRISING A MAJOR PORTION OF SPIRAL CONFORMATION GENERATED BY A STRAIGHT LINE MOVING LONGITUDINALLY OF SAID AXIS OF THE HUB GENERALLY NORMAL THERETO TO PROVIDE A SUBSTANTIALLY AXIAL PRESSURE COMPONENT, AND A TRANSVERSE CONCAVE MINOR PORTION DEFINED BY SAID TRAILING EDGE AND BOUNDED BY AN OUTWARDLY CURVED LINE EXTENDING ON SAID PRESSURE SURFACE FROM A POINT AT THE INNER END OF SAID GENERATING LINE LOCATED SUBSTANTIALLY AT THE INNER END OF SAID TRAILING EDGE TO A POINT LOCATED SUBSTANTIALLY AT THE OUTER END THEREOF, SAID CONCAVE MINOR PORTION OF THE PRESSURE SURFACE BEING SHAPED TO PROVIDE A SUBSTANTIALLY RADIAL OUTWARD PRESSURE COMPONENT.
Claim 2
Dependent Claim
214 words
A SHIP PROPELLER COMPRISING A HUB HAVING A FORWARD AND REARWARD END AND A PLURALITY OF SUBSTANTIALLY IDENTICAL BLADES EXTENDING HELICALLY FROM SAID HUB AROUND THE AXIS THEREOF, EACH BLADE HAVING ITS LEADING EDGE STARTING FROM A POINT NEAR THE LONGITUDINAL FORWARD END OF THE HUB AND ITS TRAILING EDGE STARTING FROM A POINT NEAR THE REARWARD LONGITUDINAL END OF THE HUB, EACH LEADING EDGE BEING INSCRIBED IN A CONE HAVING ITS APEX DIRECTED FORWARD AND ITS AXIS IN COINCIDENCE WITH THE AXIS OF THE HUB AND EACH TRAILING EDGE HAVING THE INNER PORTION THEREOF OF CONCAVE CURVATURE AND THE OUTER PORTION OF CONVEX CURVATURE, AND THE PRESSURE SURFACE OF EACH BLADE COMPRISING A MAJOR PORTION OF SPIRAL CONFORMATION GENERATED BY A STRAIGHT LINE MOVING LONGITUDINALLY OF SAID AXIS OF THE HUB GENERALLY NORMAL THERETO TO PROVIDE A SUBSTANTIALLY AXIAL PRESSURE COMPONENT, AND A TRANSVERSE CONCAVE MINOR PORTION DEFINED BY SAID TRAILING EDGE AND BOUNDED BY AN OUTWARDLY CURVED LINE EXTENDING ON SAID PRESSURE SURFACE FROM A POINT AT THE INNER END OF SAID GENERATING LINE LOCATED SUBSTANTIALLY AT THE INNER END OF SAID TRAILING EDGE TO A POINT LOCATED SUBSTANTIALLY AT THE OUTER END THEREOF, SAID CONCAVE MINOR PORTION OF THE PRESSURE SURFACE BEING SHAPED TO PROVIDE A SUBSTANTIALLY RADIAL OUTWARD PRESSURE COMPONENT.
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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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |