Patent US3621655A successfully refreshed from Google Patents.
US3621655A
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Fuel control system for a gas turbine engine
Assignee: Rolls Royce PLC
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Filing: 1970-03-16
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Granted: 1971-11-23
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Expires: 1990-03-16
Abstract
Abstract THE INVENTION CONCERNS A FUEL CONTROL SYSTEM FOR A GAS TURBINE ENGINE COMPRISING A FUEL PUMP AND A CLOSED LOOP FLUID LOGIC SYSTEM INCLUDING PROPORTIONAL AMPLIFER MEANS THE OUTPUT OF WHICH IS CONNECTED TO CONTROL THE DELIVERY OF THE SAID FUEL PUMP, AND THE EFFECTIVE INPUT OF WHICH IS A FUNCTION OF JET PIPE PRESSURE AND AT LEAST ONE COMPRESSOR PRESSURE.
Inventors
- 👤 David J Hawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:52
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/30; F02C9/32; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |