US3308619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incremental thrust control system
Assignee: Curtiss Wright Corp
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Filing: 1965-05-14
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Granted: 1967-03-14
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Expires: 1985-05-14
Abstract
No abstract record available.
Inventors
- 👤 Harry L Richardson
- 👤 Muhlfeider Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:44
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/50; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87507
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A FUEL CONTROL SYSTEM FOR CONTROLLING THE THRUST OUTPUT OF A ROCKET ENGINE OR THE LIKE COMPRISING: FUEL INJECTOR MEANS INCLUDING A PLURALITY OF FIXED AREA FUEL INJECTOR OPENINGS FOR SUPPLYING FUEL TO THE COMBUSTION ZONE OF SAID ENGINE, AT LEAST SOME OF SAID OPENINGS HAVING A DIFFERENT FLOW AREA SIZE THAN OTHER OF SAID OPENINGS; VALVE MEANS FOR OPENING AND CLOSING SAID FUEL INJECTOR OPENINGS, THERE BEING ONE SUCH VALVE MEANS ASSOCIATED WITH EACH SIZE FLOW AREA OPENING, EACH SAID VALVE MEANS BEING RESPONSIVE TO PREDETERMINED THRUST DEMAND SIGNALS FOR OPENING ITS ASSOCIATED FLOW AREA INJECTOR OPENING SUCH THAT FOR EACH THRUST DEMAND SIGNAL A CORRESPONDING FUEL INJECTOR OPENING WILL BE SELECTED FOR PRODUCING A LEVEL OF FUEL FLOW IN ACCORDANCE WITH THE THRUST DEMAND SIGNAL, AND SAID VALVE MEANS AND SAID FUEL INJECTOR AREA OPENINGS BEING SO RELATED THAT A NUMBER OF FUEL FLOW LEVELS ARE PROVIDED WITH THE NUMBER OF FUEL FLOW LEVELS VARYING IN ACCORDANCE WITH THE FORMULA (2N-1), WHERE N EQUALS THE NUMBER OF SAID VALVE MEANS.
Claim 2
Dependent Claim
172 words
A FUEL CONTROL SYSTEM FOR CONTROLLING THE THRUST OUTPUT OF A ROCKET ENGINE OR THE LIKE COMPRISING: FUEL INJECTOR MEANS INCLUDING A PLURALITY OF FIXED AREA FUEL INJECTOR OPENINGS FOR SUPPLYING FUEL TO THE COMBUSTION ZONE OF SAID ENGINE, AT LEAST SOME OF SAID OPENINGS HAVING A DIFFERENT FLOW AREA SIZE THAN OTHER OF SAID OPENINGS; VALVE MEANS FOR OPENING AND CLOSING SAID FUEL INJECTOR OPENINGS, THERE BEING ONE SUCH VALVE MEANS ASSOCIATED WITH EACH SIZE FLOW AREA OPENING, EACH SAID VALVE MEANS BEING RESPONSIVE TO PREDETERMINED THRUST DEMAND SIGNALS FOR OPENING ITS ASSOCIATED FLOW AREA INJECTOR OPENING SUCH THAT FOR EACH THRUST DEMAND SIGNAL A CORRESPONDING FUEL INJECTOR OPENING WILL BE SELECTED FOR PRODUCING A LEVEL OF FUEL FLOW IN ACCORDANCE WITH THE THRUST DEMAND SIGNAL, AND SAID VALVE MEANS AND SAID FUEL INJECTOR AREA OPENINGS BEING SO RELATED THAT A NUMBER OF FUEL FLOW LEVELS ARE PROVIDED WITH THE NUMBER OF FUEL FLOW LEVELS VARYING IN ACCORDANCE WITH THE FORMULA (2N-1), WHERE N EQUALS THE NUMBER OF SAID VALVE MEANS.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |