US3073115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel control for a twin spool gas turbine engine
Assignee: Holley Performance Products Inc
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Filing: 1959-03-18
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Granted: 1963-01-15
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Expires: 1979-03-18
Abstract
No abstract record available.
Inventors
- 👤 Warren H Cowles
- 👤 Dean F Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/16; F02K; F02K3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A FUEL CONTROL FOR A FREE-SHAFT TURBINE ENGINE HAVING A FREE TURBINE AND A COMPRESSOR WITH A DRIVING TURBINE THEREFOR, COMPRISING A HOUSING, AN UNMETERED FUEL INLET AND A METERED FUEL OUTLET IN SAID HOUSING, A CONDUIT CONNECTING SAID INLET AND OUTLET, A VARIABLE ORIFICE VALVE MEMBER ADAPTED TO VARIABLY RESTRICT THE FUEL FLOW THROUGH SAID CONDUIT IN ACCORDANCE WITH COMPRESSOR PRESSURE, A SECOND VALVE MEMBER ADAPTED TO METER THE FUEL FLOW THROUGH SAID CONDUIT IN ACCORDANCE WITH COMPRESSOR SPEED, A PRESSURE RESPONSIVE UNMETERED FUEL BYPASS VALVE, CONDUIT MEANS DIRECTING A PRESSURE SIGNAL CREATED IN PART BY METERED FUEL PRESSURE TO SAID PRESSURE RESPONSIVE BYPASS VALVE, A SERVO VALVE ADAPTED TO AT TIMES REDUCE IN VARYING DEGREES THE MAGNITUDE OF SAID PRESSURE SIGNAL, AND A FORCE BALANCE SYSTEM RESPONSIVE TO THE FUEL FLOW PAST SAID VARIABLE ORIFICE VALVE MEMBER FOR CONTROLLING THE POSITION OF SAID SERVO VALVE.
Claim 2
Dependent Claim
147 words
A FUEL CONTROL FOR A FREE-SHAFT TURBINE ENGINE HAVING A FREE TURBINE AND A COMPRESSOR WITH A DRIVING TURBINE THEREFOR, COMPRISING A HOUSING, AN UNMETERED FUEL INLET AND A METERED FUEL OUTLET IN SAID HOUSING, A CONDUIT CONNECTING SAID INLET AND OUTLET, A VARIABLE ORIFICE VALVE MEMBER ADAPTED TO VARIABLY RESTRICT THE FUEL FLOW THROUGH SAID CONDUIT IN ACCORDANCE WITH COMPRESSOR PRESSURE, A SECOND VALVE MEMBER ADAPTED TO METER THE FUEL FLOW THROUGH SAID CONDUIT IN ACCORDANCE WITH COMPRESSOR SPEED, A PRESSURE RESPONSIVE UNMETERED FUEL BYPASS VALVE, CONDUIT MEANS DIRECTING A PRESSURE SIGNAL CREATED IN PART BY METERED FUEL PRESSURE TO SAID PRESSURE RESPONSIVE BYPASS VALVE, A SERVO VALVE ADAPTED TO AT TIMES REDUCE IN VARYING DEGREES THE MAGNITUDE OF SAID PRESSURE SIGNAL, AND A FORCE BALANCE SYSTEM RESPONSIVE TO THE FUEL FLOW PAST SAID VARIABLE ORIFICE VALVE MEMBER FOR CONTROLLING THE POSITION OF SAID SERVO VALVE.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |