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US4081136A Expired / Lapsed US ⏱️ 0.0 years remaining

Dual manifold high performance throttleable injector

Assignee: United States Department of the Air Force
•
Filing: 1977-01-21
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Granted: 1978-03-28
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Expires: 1997-01-21
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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 10:54
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)

US3000184A Cited
US3615054A Cited
US3605408A Cited
US3710574A Cited
US3612397A Cited
US3802193A Cited

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

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