US3349557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engine fuel system
Assignee: Rolls Royce PLC
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Filing: 1966-05-31
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Granted: 1967-10-31
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Johnson Christopher Linley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:01
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/32; F02C7/00; F02C7/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A GAS TURBINE ENGINE FUEL SYSTEM COMPRISING A METERING ORIFICE, MEANS FOR VARYING THE SIZE OF THE METERING ORIFICE IN ACCORDANCE WITH AT LEAST ONE ENGINE VARIABLE, MEANS FOR PASSING THROUGH THE METERING ORIFICE A PORTION ONLY OF THE FULL FLOW OF FUEL WHICH FLOWS THROUGH THE FUEL SYSTEM, A THROTTLE VALVE WHICH IS ARRANGED DOWNSTREAM OF THE METERING ORIFICE AND WHICH CONTROLS THE FLOW OF FUEL THERETHROUGH IN ACCORDANCE WITH THE PRESSURE DROP ACROSS THE METERING ORIFICE, AND MEANS FOR PASSING THROUGH THE THROTTLE VALVE AT LEAST A PART OF BOTH THE SAID PORTION OF THE FULL FLOW OF FUEL AND THE REMAINING PORTION THEREOF.
Claim 2
Dependent Claim
106 words
A GAS TURBINE ENGINE FUEL SYSTEM COMPRISING A METERING ORIFICE, MEANS FOR VARYING THE SIZE OF THE METERING ORIFICE IN ACCORDANCE WITH AT LEAST ONE ENGINE VARIABLE, MEANS FOR PASSING THROUGH THE METERING ORIFICE A PORTION ONLY OF THE FULL FLOW OF FUEL WHICH FLOWS THROUGH THE FUEL SYSTEM, A THROTTLE VALVE WHICH IS ARRANGED DOWNSTREAM OF THE METERING ORIFICE AND WHICH CONTROLS THE FLOW OF FUEL THERETHROUGH IN ACCORDANCE WITH THE PRESSURE DROP ACROSS THE METERING ORIFICE, AND MEANS FOR PASSING THROUGH THE THROTTLE VALVE AT LEAST A PART OF BOTH THE SAID PORTION OF THE FULL FLOW OF FUEL AND THE REMAINING PORTION THEREOF.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |