Patent US3261405A successfully refreshed from Google Patents.
US3261405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft power control apparatus
Assignee: Fairchild Hiller Corp
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Filing: 1965-02-09
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Granted: 1966-07-19
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Expires: 1985-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence Henry Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:41
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34; B64C11/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
CONTROL APPARATUS FOR A TURBO-PROP AIRCRAFT ENGINE HAVING A POWER TURBINE AND VARIABLE PITCH PROPELLER DRIVEN BY SAID POWER TURBINE COMPRISING IN COMBINATION FUEL CONTROL MEANS FOR VARYING THE FUEL INPUT TO SAID ENGINE, A GOVERNOR FOR SENSING THE SPEED OF SAID PROPELLER, BLADE PITCH CONTROL MEANS RESPONSIVE TO THE SPEED SENSED BY SAID GOVERNOR FOR VARYING THE PITCH OF SAID PROPELLER BLADES TO OBTAIN THE DESIRED PROPELLER SPEED, AND MEANS OPERATIVELY CONNECTING SAID BLADE PITCH AND FUEL CONTROL MEANS FOR SYNCHRONOUSLY ACTUATING BOTH SUCH MEANS, SAID ACTUATING MEANS REDUCING THRUST DEVELOPED BY SAID PROPELLER IN A FORWARD POWER POSITION BY DECREASING BLADE PITCH WHILE INCREASING THE SETTING OF SAID FUEL CONTROL MEANS TO MAINTAIN A RELATIVELY HIGH POWER TURBINE SPEED WHEN SAID ACTUATING MEANS IS RETARDED FROM SUCH FORWARD POWER POSITION.
Claim 2
Dependent Claim
132 words
CONTROL APPARATUS FOR A TURBO-PROP AIRCRAFT ENGINE HAVING A POWER TURBINE AND VARIABLE PITCH PROPELLER DRIVEN BY SAID POWER TURBINE COMPRISING IN COMBINATION FUEL CONTROL MEANS FOR VARYING THE FUEL INPUT TO SAID ENGINE, A GOVERNOR FOR SENSING THE SPEED OF SAID PROPELLER, BLADE PITCH CONTROL MEANS RESPONSIVE TO THE SPEED SENSED BY SAID GOVERNOR FOR VARYING THE PITCH OF SAID PROPELLER BLADES TO OBTAIN THE DESIRED PROPELLER SPEED, AND MEANS OPERATIVELY CONNECTING SAID BLADE PITCH AND FUEL CONTROL MEANS FOR SYNCHRONOUSLY ACTUATING BOTH SUCH MEANS, SAID ACTUATING MEANS REDUCING THRUST DEVELOPED BY SAID PROPELLER IN A FORWARD POWER POSITION BY DECREASING BLADE PITCH WHILE INCREASING THE SETTING OF SAID FUEL CONTROL MEANS TO MAINTAIN A RELATIVELY HIGH POWER TURBINE SPEED WHEN SAID ACTUATING MEANS IS RETARDED FROM SUCH FORWARD POWER POSITION.
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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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |