Patent US4081136A successfully refreshed from Google Patents.
US4081136A
Expired / Lapsed
US
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Dual manifold high performance throttleable injector
Assignee: United States Department of the Air Force
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Filing: 1977-01-21
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Granted: 1978-03-28
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Expires: 1997-01-21
Abstract
Abstract A dual manifold propellant injector having at least four distinct platelets in its configuration. The first two platelets constituting the primary and secondary fuel platelets; the third and fourth platelets constituting the primary and secondary oxidizer platelets. By proper valve throttling, the injector is capable of providing homogeneous, intimately mixed propellants at all thrust levels.
Inventors
- 👤 John F. Addoms
- 👤 Charles B. McGough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:18
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
218 words
An injector for uniformly distributing propellant within the combustion chamber of a rocket engine comprising at least four platelets, each of said platelets having planar surfaces and edge surfaces, one of said planar surfaces of each of said platelets containing a plurality of flow passages therein, said flow passages terminating at said edge surface in an opening in said edge surface, said platelets being joined together in a stack to form a unitary structure, the first of said platelets having means therein adapted to receive a predetermined quantity of fuel, the second of said platelets having means therein adapted to receive less than said predetermined quantity of fuel, the third of said platelets having means therein adapted to receive a predetermined quantity of oxidizer, the fourth of said platelets adapted to receive less than said predetermined quantity of oxidizer, each of said first and second platelets having means therein for operatively connecting said fuel receiving means to said flow passages, each of said third and fourth platelets having means therein for operatively connecting said oxidizer receiving means to said flow passages and each of said platelets having flow restrictors therein operatively connected to said flow passages for metering flow of propellant to each of said edge surface openings thereby providing homogeneous, intimately mixed propellants at all thrust levels.
Claim 2
Dependent Claim
218 words
An injector for uniformly distributing propellant within the combustion chamber of a rocket engine comprising at least four platelets, each of said platelets having planar surfaces and edge surfaces, one of said planar surfaces of each of said platelets containing a plurality of flow passages therein, said flow passages terminating at said edge surface in an opening in said edge surface, said platelets being joined together in a stack to form a unitary structure, the first of said platelets having means therein adapted to receive a predetermined quantity of fuel, the second of said platelets having means therein adapted to receive less than said predetermined quantity of fuel, the third of said platelets having means therein adapted to receive a predetermined quantity of oxidizer, the fourth of said platelets adapted to receive less than said predetermined quantity of oxidizer, each of said first and second platelets having means therein for operatively connecting said fuel receiving means to said flow passages, each of said third and fourth platelets having means therein for operatively connecting said oxidizer receiving means to said flow passages and each of said platelets having flow restrictors therein operatively connected to said flow passages for metering flow of propellant to each of said edge surface openings thereby providing homogeneous, intimately mixed propellants at all thrust levels.
Claim 3
Dependent Claim
27 words
A propellant injector as defined in claim 1 wherein said first and third platelets have a greater number of edge openings than said second and fourth platelets.
Claim 4
Dependent Claim
41 words
A propellant injector as defined in claim 1 wherein said fuel and oxidizer receiving means of said first and third platelets, respectively, are larger in cross-sectional area than said fuel and oxidizer receiving means of said second and third platelets, respectively.
Claim 5
Dependent Claim
33 words
A propellant injector as defined in claim 3 wherein said fuel receiving means of said first platelet and said oxidizer receiving means of said third platelet constitute the primary manifolds of said injector.
Claim 6
Dependent Claim
27 words
A propellant injector as defined in claim 4 wherein said first and third platelets have a greater number of edge openings than said second and fourth platelets.
Claim 7
Dependent Claim
37 words
A propellant injector as defined in claim 5 wherein said flow restrictors are of a shallower depth within said planar surfaces of said platelets than said flow passages thereby providing for a relatively high pressure drop thereacross.
Claim 8
Dependent Claim
33 words
A propellant injector as defined in claim 6 wherein said fuel receiving means of said second platelet and said oxidizer receiving means of said fourth platelet constitute the secondary manifolds of said injector.
Claim 9
Dependent Claim
28 words
A propellant injector as defined in claim 7 wherein the cross-sectional area of said primary oxidizer manifold is larger than the cross-sectional area of said primary fuel manifold.
Claim 10
Dependent Claim
26 words
A propellant injector as defined in claim 8 wherein said platelets further comprise flared distribution regions interposed between said flow restrictors and said edge surface openings.
Claim 11
Dependent Claim
31 words
A propellant injector as defined in claim 9 wherein said distribution regions of said second and fourth platelets are larger in size than said distribution of said first and third platelets.
References Cited (Backward Citations)
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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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |