US3249161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feathering controllable pitch propeller
Assignee: Individual
•
Filing: 1964-12-02
•
Granted: 1966-05-03
•
Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Karl E Schoenherr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:12
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
339 words
A FEATHERING CONTROLLABLE PITCH PROPELLER FOR REDUCING SHIP VIBRATIONS COMPRISING: A HUB; A PLURALITY OF BLADE SPINDLES SPACED ABOUT SAID HUB, EACH OF SAID SPINDLES ROTATABLE IN SAID HUB ABOUT AN AXIS PERPENDICULAR TO THE AXIS OF ROTATION OF THE PEROPELLER; A PLURALITY OF PROPELLER BLADES EACH OF SAID BLADES BEING SECURED TO ONE OF SAID BLADE SPINDLES; EACH OF SAID BLADES HAVING A BLADE AREA WHICH IS SKEWED AFT AND HGAVING A CENTER OF PRESSURE LYING AFT OF THE BLADE AXIS OF ROTATION; RESILIENT MEANS BIASING EACH OF SAID BLADE SPINDLES FOR CONTROLLING THE ANGLE OF ATTACK OF THE PROPELLER BLADES IN RESPONSE TO WAKE FORCE FLUCTUATIONS; A COVER PLATE MOUNTED ON ONE END OF THE HUB HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES; A TENSION ROD SLIDABLY MOUNTED IN EACH OF THE APERTURES; OF SAID COVER PLATE; A SPRING MOUNTED IN OVERLYING RELATION TO ONE END OF EACH OF SAID RODS; HOLDING MEANS FORCING EACH OF SAID SPRINGS AGAINST ONE SIDE OF SAID COVER PLATE; A PLURALITY OF FLEXIBLE BANDS EACH HAVING ONE END SECURED TO THE OTHER END OF ONE OF SAID RODS AND HAVING ITS OTHER END SECURED TO ONE OF SAID SPINDLES; WHEREBY SAID BAND WINDS AROUND SAID SPINDLE IN RESPONSE TO AN INCREASE IN PRESSURE ON THE ASSOCIATED BLADE AND UNWINDS UNDER THE FORCE OF SAID SPRING IN RESPONSE TO A DECREASE IN PRESSURE; EACH OF SAID APERTURES IN SAID COVER PLATE COMPRISING TWO PORTIONS, WITH ONE OF SAID PORTIONS BEING SQUARE IN TRANSVERSE CROSS-SECTION, SAID SQUARE PORTION RECEIVING A SQUARE MIDDLE PORTION OF SAID TENSION ROD THEREBY PREVENTING ROTATIONAL MOVEMENT OF SAID ROD AND TWISTING OF SAID BAND; SAID OTHER PORTION BEING CIRCULAR IN TRANSVERSE CROSSSECTION AND HAVING A DIAMETER GREATER THAN THE GREATEST DIMENSION OF THE SQUARE PORTION, WHEREBY SAID CIRCULAR PORTION FORMS A SEAT FOR SAID SPRING; AND A LONGITUDINAL BAR SECURED AT ONE END TO SAID COVER PLATE, SAID BAR HAVING APERTURE MEANS THEREIN RECEIVING A PORTION OF SAID BLADE SPINDLES FOR PROVIDING BEARING SURFACES FOR SAID BLADE SPINDLES.
Claim 2
Dependent Claim
339 words
A FEATHERING CONTROLLABLE PITCH PROPELLER FOR REDUCING SHIP VIBRATIONS COMPRISING: A HUB; A PLURALITY OF BLADE SPINDLES SPACED ABOUT SAID HUB, EACH OF SAID SPINDLES ROTATABLE IN SAID HUB ABOUT AN AXIS PERPENDICULAR TO THE AXIS OF ROTATION OF THE PEROPELLER; A PLURALITY OF PROPELLER BLADES EACH OF SAID BLADES BEING SECURED TO ONE OF SAID BLADE SPINDLES; EACH OF SAID BLADES HAVING A BLADE AREA WHICH IS SKEWED AFT AND HGAVING A CENTER OF PRESSURE LYING AFT OF THE BLADE AXIS OF ROTATION; RESILIENT MEANS BIASING EACH OF SAID BLADE SPINDLES FOR CONTROLLING THE ANGLE OF ATTACK OF THE PROPELLER BLADES IN RESPONSE TO WAKE FORCE FLUCTUATIONS; A COVER PLATE MOUNTED ON ONE END OF THE HUB HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED APERTURES; A TENSION ROD SLIDABLY MOUNTED IN EACH OF THE APERTURES; OF SAID COVER PLATE; A SPRING MOUNTED IN OVERLYING RELATION TO ONE END OF EACH OF SAID RODS; HOLDING MEANS FORCING EACH OF SAID SPRINGS AGAINST ONE SIDE OF SAID COVER PLATE; A PLURALITY OF FLEXIBLE BANDS EACH HAVING ONE END SECURED TO THE OTHER END OF ONE OF SAID RODS AND HAVING ITS OTHER END SECURED TO ONE OF SAID SPINDLES; WHEREBY SAID BAND WINDS AROUND SAID SPINDLE IN RESPONSE TO AN INCREASE IN PRESSURE ON THE ASSOCIATED BLADE AND UNWINDS UNDER THE FORCE OF SAID SPRING IN RESPONSE TO A DECREASE IN PRESSURE; EACH OF SAID APERTURES IN SAID COVER PLATE COMPRISING TWO PORTIONS, WITH ONE OF SAID PORTIONS BEING SQUARE IN TRANSVERSE CROSS-SECTION, SAID SQUARE PORTION RECEIVING A SQUARE MIDDLE PORTION OF SAID TENSION ROD THEREBY PREVENTING ROTATIONAL MOVEMENT OF SAID ROD AND TWISTING OF SAID BAND; SAID OTHER PORTION BEING CIRCULAR IN TRANSVERSE CROSSSECTION AND HAVING A DIAMETER GREATER THAN THE GREATEST DIMENSION OF THE SQUARE PORTION, WHEREBY SAID CIRCULAR PORTION FORMS A SEAT FOR SAID SPRING; AND A LONGITUDINAL BAR SECURED AT ONE END TO SAID COVER PLATE, SAID BAR HAVING APERTURE MEANS THEREIN RECEIVING A PORTION OF SAID BLADE SPINDLES FOR PROVIDING BEARING SURFACES FOR SAID BLADE SPINDLES.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |