US4044683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat generator
Assignee: McDonnell Douglas Corp
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Filing: 1959-08-20
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Granted: 1977-08-30
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Expires: 1979-08-20
Abstract
Abstract 1. A decoy missile for high speed air travel comprising the improvement of a casing open at one end, a substantially closed air receiving chamber in said casing, conduit means supplying combustion air under pressure from a remote source connected to said closed chamber, hollow flameholder means mounted in said closed chamber to admit air under pressure to the hollow interior, said flameholder means having an open end adjacent said one end of the casing, fuel supply spray means connected to said flameholder means to supply fuel thereto under pressure, igniter means to initiate combustion of the fuel sprayed into the air within the hollow interior of said flameholder means, and a heat radiating foraminous member carried by said casing over the open ends of said casing and flameholder means and exposed for viewing in the high speed air stream, said foraminous member forming with the hollow interior of said flameholder means an enclosed combustion space and being composed of a finely perforated sintered porous material through which the hot combustion gases pass and which imposes a substantial pressure drop between the combustion space and the exterior surface of said member to create a layer of hot gases on the exterior surfaces which is relatively stable in the high velocity air flow about said casing and over the exterior of said member, the products of combustion passing through said foraminous member acting to soak said member and raise the temperature thereof to infrared emission temperature.
Inventors
- 👤 Harold H. Ostroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:32
CPC Classifications
F; F23; F23C; F23C3/00; F41; F41J; F41J9/00; F41J9/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
247 words
A decoy missile for high speed air travel comprising the improvement of a casing open at one end, a substantially closed air receiving chamber in said casing, conduit means supplying combustion air under pressure from a remote source connected to said closed chamber, hollow flameholder means mounted in said closed chamber to admit air under pressure to the hollow interior, said flame- holder means having an open end adjacent said one end of the casing, fuel supply spray means connected to said flameholde means to supply fuel thereto under pressure, igniter means to initiate combustion of the fuel sprayed into the air within the hollow interior of said flameholer means, and a heat radiating foraminous member carried by said casing over the open ends of said casing and flameholder means and exposed for viewing in the high speed air stream, said foraminous member forming with the hollow interior of said flame- holer means an enclosed combustion space and being composed of a finely perforated sintered porour material through which the hot combustion gases pass and which imposes a substantial pressure drop between the combustion space and the exterior surface of said member to create a layer of hot gases on the exterior surfaces which is relatively stable in the high velocity air flow about said casing and over the exterior of said member, the products of combustion passing through said foraminous member acting to soak said member and raise the temperature thereof to infrared to emission temperature.
Claim 2
Dependent Claim
247 words
A decoy missile for high speed air travel comprising the improvement of a casing open at one end, a substantially closed air receiving chamber in said casing, conduit means supplying combustion air under pressure from a remote source connected to said closed chamber, hollow flameholder means mounted in said closed chamber to admit air under pressure to the hollow interior, said flame- holder means having an open end adjacent said one end of the casing, fuel supply spray means connected to said flameholde means to supply fuel thereto under pressure, igniter means to initiate combustion of the fuel sprayed into the air within the hollow interior of said flameholer means, and a heat radiating foraminous member carried by said casing over the open ends of said casing and flameholder means and exposed for viewing in the high speed air stream, said foraminous member forming with the hollow interior of said flame- holer means an enclosed combustion space and being composed of a finely perforated sintered porour material through which the hot combustion gases pass and which imposes a substantial pressure drop between the combustion space and the exterior surface of said member to create a layer of hot gases on the exterior surfaces which is relatively stable in the high velocity air flow about said casing and over the exterior of said member, the products of combustion passing through said foraminous member acting to soak said member and raise the temperature thereof to infrared to emission temperature.
Claim 3
Dependent Claim
229 words
A decoy missile for high speed air travel comprising a casing having an open end, an imperforate wall air receiving chamber in said casing, conduit means connected to said chamber to supply combustion air under pressure thereto, a perforated flameholder basket in said chamber spaced from the walls thereof, the air passing into said basket through said perforations, said basket having an outlet facing said casing opening, fuel spray means connected to said basket spaced from said basket outlet, means to supply fuel to said spray means under pressure, means to ignite the fuel and air within said basket, and an infrared radiating foraminous member mounted over the open end of said casing and forming with said basket a combustion space, said foraminous member being exposed for viewing in the high speed air stream and composed of porous sintered material having a semispherical shape and imposing a substantial pressure drop on the hot gas flow from the interior combustion space to cause high velocity flow of hot gases of combustion therethrough to the exposed exterior surface, said foraminous member retaining the hot gases on the exterior surface to establish a hot gas boundary layer which is substantially stable under the high speed ambient air flow, whereby said foraminous member has its inner and outer surfaces substantially soaked in the hot gases to elevate the temperature to infrared emission temperature.
Claim 4
Dependent Claim
229 words
A decoy missile for high speed air travel comprising a casing having an open end, an imperforate wall air receiving chamber in said casing, conduit means connected to said chamber to supply combustion air under pressure thereto, a perforated flameholder basket in said chamber spaced from the walls thereof, the air passing into said basket through said perforations, said basket having an outlet facing said casing opening, fuel spray means connected to said basket spaced from said basket outlet, means to supply fuel to said spray means under pressure, means to ignite the fuel and air within said basket, and an infrared radiating foraminous member mounted over the open end of said casing and forming with said basket a combustion space, said foraminous member being exposed for viewing in the high speed air stream and composed of porous sintered material having a semispherical shape and imposing a substantial pressure drop on the hot gas flow from the interior combustion space to cause high velocity flow of hot gases of combustion therethrough to the exposed exterior surface, said foraminous member retaining the hot gases on the exterior surface to establish a hot gas boundary layer which is substantially stable under the high speed ambient air flow, whereby said foraminous member has its inner and outer surfaces substantially soaked in the hot gases to elevate the temperature to infrared emission temperature.
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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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |