US3650474A
Expired / Lapsed
US
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Bipropellant injector
Assignee: National Aeronautics and Space Administration
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Filing: 1967-09-25
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Granted: 1972-03-21
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Expires: 1987-09-25
Abstract
Abstract A bipropellant injector consisting of a pair of concave deflector blocks with their concave surfaces facing one another. The concave surfaces diverge downwardly with a fixed spaced relationship between them at the base of the injector. A triangular ''''shute'''' is formed in each concave surface, by a pair of diverging sidewalls. The two shutes are opposite one another. A circular orifice is located at the apex of each shute to provide an inlet for propellant, such as fuel or oxidizer to enter the injector. Propellant, forced through each orifice as a circular jet, is directed downwardly along the shute spreading out against the concave shute surface. The propellant spreads to form a sheet which is limited between the shute''s sidewalls. It finally clears the shute''s lower edge, and mixes with the propellant flowing from the opposite shute along the centerline of the space between the injector''s blocks.
Inventors
- 👤 Robert W Riebling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:13
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10; F23D11/108; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/52; F23D11/12; F23D11/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
227 words
An injector for mixing two liquids supplied thereto comprising: a first shute having a bottom surface uniformly curving from a top end thereof to an opposite bottom end, and a pair of sidewalls on opposite sides of said surface, the walls diverging from one another from said top to the bottom ends of said surface, the curved surface between the sidewalls at said top end defining a shute apex and the curved surface between the sidewalls at the bottom end defining a shute base, one of said liquids being injectable at the shute apex; a second shute having a bottom surface uniformly curving from a top end thereof to an opposite bottom end, and a pair of sidewalls on opposite sides of said surface, the walls diverging from one another from said top to the bottom ends of said surface, the curved surface between the sidewalls at said top end defining a shute apex and the curved surface between the sidewalls at the bottom end defining a shute base, the other of said two liquids being injectable at the shute apex; and means for fixedly positioning the first and second shutes opposite one another with their bases in parallel spaced relationship, the space therebetween defining the outlet of said injector with the distance between the bases being less than the distance between the apexes of said shutes.
Claim 2
Dependent Claim
227 words
An injector for mixing two liquids supplied thereto comprising: a first shute having a bottom surface uniformly curving from a top end thereof to an opposite bottom end, and a pair of sidewalls on opposite sides of said surface, the walls diverging from one another from said top to the bottom ends of said surface, the curved surface between the sidewalls at said top end defining a shute apex and the curved surface between the sidewalls at the bottom end defining a shute base, one of said liquids being injectable at the shute apex; a second shute having a bottom surface uniformly curving from a top end thereof to an opposite bottom end, and a pair of sidewalls on opposite sides of said surface, the walls diverging from one another from said top to the bottom ends of said surface, the curved surface between the sidewalls at said top end defining a shute apex and the curved surface between the sidewalls at the bottom end defining a shute base, the other of said two liquids being injectable at the shute apex; and means for fixedly positioning the first and second shutes opposite one another with their bases in parallel spaced relationship, the space therebetween defining the outlet of said injector with the distance between the bases being less than the distance between the apexes of said shutes.
Claim 3
Dependent Claim
102 words
The injector as recited in claim 1 wherein said means for injecting comprise first liquid inlet means fixedly positioned at the apex of said first shute and defining a first orifice through which a jet of liquid is injectable into said first shute, said means for injecting further comprising a second liquid inlet means fixedly positioned at the apex of said second shute and defining a second orifice through which a jet of liquid is injectable into said second shute, whereby the liquids injected in said first and second liquid inlet means are combinable only in the space defining the injector outlet.
Claim 4
Dependent Claim
171 words
An injector for mixing two fluids supplied thereto comprising: first and second deflecting blocks fixed opposite one another at a spaced apart relationship, each block defining a shute in the surface opposite the other block, said shute having a bottom of a continuous preselected curvature extending from a first end of the block to a second opposite end, said shute further comprising a pair of sidewalls diverging from said first end to the second end, the spacing between the bottoms of the shutes at said first ends being greater than the spacing between the shutes'' bottoms at said second ends; and a pair of fluid injecting means positioned at the apexes of the shutes defined in said first and second blocks for injecting jets of fluid into said shutes at the apexes thereof, whereby the fluid in each shute flows from the shute apex towards the other shute end over said curved bottom, the fluid spreading out to form a sheet of fluid physically bound by the sidewalls of said shutes.
Claim 5
Dependent Claim
171 words
An injector for mixing two fluids supplied thereto comprising: first and second deflecting blocks fixed opposite one another at a spaced apart relationship, each block defining a shute in the surface opposite the other block, said shute having a bottom of a continuous preselected curvature extending from a first end of the block to a second opposite end, said shute further comprising a pair of sidewalls diverging from said first end to the second end, the spacing between the bottoms of the shutes at said first ends being greater than the spacing between the shutes'' bottoms at said second ends; and a pair of fluid injecting means positioned at the apexes of the shutes defined in said first and second blocks for injecting jets of fluid into said shutes at the apexes thereof, whereby the fluid in each shute flows from the shute apex towards the other shute end over said curved bottom, the fluid spreading out to form a sheet of fluid physically bound by the sidewalls of said shutes.
Claim 6
Dependent Claim
139 words
An injector for controlling the uniform mixing of two liquids supplied thereto comprising: a pair of oppositely positioned liquid-flow-controlling shutes, each shute having a uniformly curving bottom surface and two sidewalls diverging from one another from one end of said shute, defining a shute apex, towards an opposite end, defining a shute base, the bases of said shutes being parallel and spaced apart from one another to define an injector outlet, the outlet width defined by the distance between the bases being less than the distance between the shutes'' apexes; and two liquid inlet means, each one positioned at the apex of a different one of said shutes to provide means for injecting one of said two liquids into the shute, with the liquids exiting the shutes'' bases being uniformly mixable substantially along the center of said injector outlet.
Claim 7
Dependent Claim
139 words
An injector for controlling the uniform mixing of two liquids supplied thereto comprising: a pair of oppositely positioned liquid-flow-controlling shutes, each shute having a uniformly curving bottom surface and two sidewalls diverging from one another from one end of said shute, defining a shute apex, towards an opposite end, defining a shute base, the bases of said shutes being parallel and spaced apart from one another to define an injector outlet, the outlet width defined by the distance between the bases being less than the distance between the shutes'' apexes; and two liquid inlet means, each one positioned at the apex of a different one of said shutes to provide means for injecting one of said two liquids into the shute, with the liquids exiting the shutes'' bases being uniformly mixable substantially along the center of said injector outlet.
Claim 8
Dependent Claim
53 words
The injector as recited in claim 4 wherein each of said liquid inlet means defines a circular orifice, whereby the liquid injected into the shute is in the form of a circular jet of liquid, spreading out against the bottom surface of the shute and forming a liquid-solid boundary with the shute''s sidewalls.
Claim 9
Dependent Claim
40 words
The injector as recited in claim 5 wherein the bottom surface of each shute is concave with the curvatures of the two surfaces at the shute''s bases defining an impingement angle at which the liquids, exiting the shutes, are combined.
Claim 10
Dependent Claim
40 words
The injector as recited in claim 4 wherein the bottom surface of each shute is concave with the curvatures of the two surfaces at the shute''s bases defining an impingement angle at which the liquids, exiting the shutes, are combined.
Claim 11
Dependent Claim
112 words
An injector for controlling the uniform mixing of two liquids supplied thereto, comprisIng: a pair of uniformly curved oppositely positioned shutes, converging towards one another from first ends thereof representing shutes'' apexes at which said liquids are supplied to second ends thereof representing shutes'' bases, the space between the bases defining an injector outlet, each shute having a uniform concave bottom surface extending from its apex to its base and a pair of sidewalls diverging from the apex to the base, whereby two different liquids supplied at the apexes of the shutes spread out therein to form sheets of liquid exiting said shutes'' bases to be uniformly mixed at the injector outlet.
Claim 12
Dependent Claim
112 words
An injector for controlling the uniform mixing of two liquids supplied thereto, comprisIng: a pair of uniformly curved oppositely positioned shutes, converging towards one another from first ends thereof representing shutes'' apexes at which said liquids are supplied to second ends thereof representing shutes'' bases, the space between the bases defining an injector outlet, each shute having a uniform concave bottom surface extending from its apex to its base and a pair of sidewalls diverging from the apex to the base, whereby two different liquids supplied at the apexes of the shutes spread out therein to form sheets of liquid exiting said shutes'' bases to be uniformly mixed at the injector outlet.
References Cited (Backward Citations)
US1321816A
Cited
US1366685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |