Patent US3145780A successfully refreshed from Google Patents.
US3145780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Individual
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Filing: 1962-01-12
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Granted: 1964-08-25
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Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 George W Kean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:01
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN AUTOMATICALLY ADJUSTABLE PROPELLER ADAPTED TO BE MOUNTED ON AN ENGINE DRIVE SHAFT, SAID PROPELLER INCLUDING A MOUNTING MEMBER ADAPTED TO BE AFFIXED TO SAID DRIVE SHAFT COAXIALLY THEREOF, A GEAR SLIDABLE AXIALLY ON SAID MOUNTING MEMBER IN FORWARD AND REARWARD DIRECTIONS AND SECURED AGAINST ROTATION RELATIVELY THERETO, A BODY PORTION SLIDABLE AXIALLY ON SAID MOUNTING MEMBER WITH SAID GEAR AND ROTATABLE RELATIVELY THERETO, PROPELLER BLADES EXTENDING RADIALLY FROM SAID BODY PORTION AND MOUNTED THEREIN FOR ROTATION BETWEEN POSITIONS OF MAXIMUM AND MINIMUM PITCH, SAID PROPELLER BLADES HAVING PINION PORTIONS ENGAGEABLE WITH SAID GEAR, A RACK ENGAGEABLE WITH SAID PINION PORTIONS, AND A SPRING BIASING SAID RACK TO ROTATE SAID PROPELLER BLADES TOWARD A POSITION OF MAXIMUM PITCH AND SAID BODY PORTION IN THE DIRECTION OF FORWARD ROTATION OF SAID PROPELLER THROUGH ENGAGEMENT OF SAID PINION PORTIONS WITH SAID GEAR, AND STOP MEANS FOR LIMITING THE ROTATION OF SAID BODY PORTION RELATIVE TO SAID GEAR.
Claim 2
Dependent Claim
155 words
AN AUTOMATICALLY ADJUSTABLE PROPELLER ADAPTED TO BE MOUNTED ON AN ENGINE DRIVE SHAFT, SAID PROPELLER INCLUDING A MOUNTING MEMBER ADAPTED TO BE AFFIXED TO SAID DRIVE SHAFT COAXIALLY THEREOF, A GEAR SLIDABLE AXIALLY ON SAID MOUNTING MEMBER IN FORWARD AND REARWARD DIRECTIONS AND SECURED AGAINST ROTATION RELATIVELY THERETO, A BODY PORTION SLIDABLE AXIALLY ON SAID MOUNTING MEMBER WITH SAID GEAR AND ROTATABLE RELATIVELY THERETO, PROPELLER BLADES EXTENDING RADIALLY FROM SAID BODY PORTION AND MOUNTED THEREIN FOR ROTATION BETWEEN POSITIONS OF MAXIMUM AND MINIMUM PITCH, SAID PROPELLER BLADES HAVING PINION PORTIONS ENGAGEABLE WITH SAID GEAR, A RACK ENGAGEABLE WITH SAID PINION PORTIONS, AND A SPRING BIASING SAID RACK TO ROTATE SAID PROPELLER BLADES TOWARD A POSITION OF MAXIMUM PITCH AND SAID BODY PORTION IN THE DIRECTION OF FORWARD ROTATION OF SAID PROPELLER THROUGH ENGAGEMENT OF SAID PINION PORTIONS WITH SAID GEAR, AND STOP MEANS FOR LIMITING THE ROTATION OF SAID BODY PORTION RELATIVE TO SAID GEAR.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |