IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0250081
(2008-10-13)
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등록번호 |
US-7690308
(2010-05-20)
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발명자
/ 주소 |
- Nielson, Daniel B.
- Tanner, Richard L.
- Dilg, Carl
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
23 인용 특허 :
53 |
초록
▼
Flares include grain assemblies comprising a combustible grain and a reactive foil positioned at least proximate to the grain and configured to ignite combustion of the grain upon ignition of the reactive foil. The reactive foil may include alternating layers of reactive materials. Methods of fabric
Flares include grain assemblies comprising a combustible grain and a reactive foil positioned at least proximate to the grain and configured to ignite combustion of the grain upon ignition of the reactive foil. The reactive foil may include alternating layers of reactive materials. Methods of fabricating flares include at least partially covering an exterior surface of a combustible grain with a reactive foil to form a grain assembly, and inserting the grain assembly at least partially into a casing. The reactive foil may include alternating layers of reactive materials that are configured to react with one another in an exothermic chemical reaction upon ignition. Furthermore, methods of igniting a flare grain include initiating an exothermic chemical reaction between alternating layers of reactive materials in a reactive foil located proximate to the flare grain.
대표청구항
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What is claimed is: 1. A method of fabricating a flare, the method comprising: forming a grain assembly comprising covering greater than about fifty percent (50%) of an entire exterior surface of an elongated grain comprising combustible material with a reactive foil comprising alternating layers o
What is claimed is: 1. A method of fabricating a flare, the method comprising: forming a grain assembly comprising covering greater than about fifty percent (50%) of an entire exterior surface of an elongated grain comprising combustible material with a reactive foil comprising alternating layers of at least a first material and a second material, the first material and the second material being configured to react with one another in an exothermic chemical reaction upon ignition; and inserting the grain assembly at least partially into a casing. 2. The method of claim 1, further comprising securing an impulse charge device to the casing, and configuring the impulse charge device to force the grain assembly out from the casing upon ignition of the impulse charge device. 3. The method of claim 2, further comprising providing an ignition assembly within the casing between the impulse charge device and the grain assembly, and configuring the ignition assembly to prevent ignition of the grain assembly until the grain assembly has been substantially ejected from the casing. 4. The method of claim 1, wherein forming a grain assembly further comprises: providing the elongated grain with a first end, a second end, and at least one exterior lateral surface extending longitudinally between the first end and the second end; and providing a generally planar sheet of the reactive foil; and wherein covering greater than about fifty percent (50%) of the entire exterior surface of the elongated grain comprises wrapping at least a portion of the generally planar sheet of the reactive foil around at least a portion of the at least one exterior lateral surface of the elongated grain. 5. The method of claim 4, wherein wrapping at least a portion of the generally planar sheet of the reactive foil around at least a portion of the at least one exterior lateral surface of the elongated grain comprises causing the at least a portion of the generally planar sheet of reactive foil to substantially conform to a shape of the at least a portion of the at least one exterior lateral surface of the elongated grain. 6. The method of claim 5, wherein wrapping at least a portion of the generally planar sheet of reactive foil around at least a portion of the at least one exterior lateral surface of the elongated grain further comprises providing direct physical contact between the at least a portion of the generally planar sheet of the reactive foil and the at least a portion of the at least one exterior lateral surface of the elongated grain. 7. The method of claim 6, further comprising providing direct physical contact between at least a portion of the generally planar sheet of the reactive foil and at least a portion of at least one of the first end and the second end of the elongated grain. 8. The method of claim 4, further comprising forming the elongated grain to comprise a combustible material configured to emit a peak emission wavelength in one of the visible, ultraviolet, and infrared regions of the electromagnetic radiation spectrum upon combustion. 9. The method of claim 4, further comprising forming at least one longitudinally extending groove in the at least one exterior lateral surface of the elongated grain. 10. The method of claim 4, wherein providing the generally planar sheet of the reactive foil comprises selecting the reactive foil to include alternating layers of the at least a first material and a second material each having an average thickness of less than about 100 nanometers. 11. The method of claim 4, further comprising selecting the reactive foil to include alternating layers of a first material comprising a first element in substantially elemental form and a second material comprising an aluminide, boride, carbide, oxide, or silicide of a second element. 12. The method of claim 11, further comprising selecting the reactive foil to include alternating layers of a first material comprising aluminum and a second material comprising at least one of iron oxide, copper oxide, and zinc oxide. 13. A method of igniting an elongated flare grain, the method comprising: forcing the elongated flare grain out from a casing; and igniting a reactive foil covering greater than about fifty percent (50%) of an entire exterior surface of the elongated flare grain, igniting the reactive foil comprising initiating an exothermic chemical reaction between alternating layers of at least a first material and a second material in the reactive foil. 14. The method of claim 13, wherein igniting the reactive foil comprises causing an explosion within an impulse charge device to force the reactive foil and the flare grain out from the casing and ignite the reactive foil. 15. The method of claim 14, further comprising preventing ignition of the elongated flare grain until the elongated flare grain has been ejected from the casing using an ignition sequence assembly. 16. The method of claim 13, wherein initiating an exothermic chemical reaction comprises initiating an exothermic chemical reaction between alternating layers of at least a first material and a second material, each layer having an average thickness of less than about 100 nanometers. 17. The method of claim 13, wherein initiating an exothermic chemical reaction comprises initiating an exothermic chemical reaction between alternating layers of a first material comprising a first element in substantially elemental form and a second material comprising an aluminide, boride, carbide, oxide, or silicide of a second, different element. 18. The method of claim 17, wherein initiating an exothermic chemical reaction comprises initiating an exothermic chemical reaction between alternating layers of a first material comprising aluminum and a second material comprising at least one of iron oxide, copper oxide, and zinc oxide.
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