Patent US4073136A successfully refreshed from Google Patents.
US4073136A
Expired / Lapsed
US
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Fuel system for gas turbine engines
Assignee: Rolls Royce PLC
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Filing: 1976-08-27
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Granted: 1978-02-14
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Expires: 1996-08-27
Abstract
Abstract A fuel system for a gas turbine engine has in flow series a low pressure pump, a filter and a high pressure pump, latter being connected to a delivery duct leading to the engine. The low pressure pump is a jet pump wherein the jet is produced by spill flow from the delivery duct. The spill flow is heated to prevent ice formation in the filter.
Inventors
- 👤 Roger J. Symon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:19
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A fuel system for a gas turbine engine, comprising a fuel source, a low pressure jet pump having an inlet chamber connected to said fuel source, said pump including a nozzle for energizing the fluid in the chamber and an outlet for the energized fluid, a filter, a high pressure pump, conduit means connecting in series said outlet of said jet pump said filter said high pressure pump and the engine, and a branch conduit extending from said high pressure pump to said nozzle of the jet pump to supply energizing fluid thereto, said branch including a heater for the fluid passing through said branch thereby to heat the fluid supplied by said jet pump to said filter.
Claim 2
Dependent Claim
118 words
A fuel system for a gas turbine engine, comprising a fuel source, a low pressure jet pump having an inlet chamber connected to said fuel source, said pump including a nozzle for energizing the fluid in the chamber and an outlet for the energized fluid, a filter, a high pressure pump, conduit means connecting in series said outlet of said jet pump said filter said high pressure pump and the engine, and a branch conduit extending from said high pressure pump to said nozzle of the jet pump to supply energizing fluid thereto, said branch including a heater for the fluid passing through said branch thereby to heat the fluid supplied by said jet pump to said filter.
References Cited (Backward Citations)
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Cited
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US3645094A
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US3736072A
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US3779007A
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US3874168A
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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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |