Stacked pellet flare assembly and methods of making and using the same

• US 7,640,858 B1
• Filed: 01/23/2004
• Issued: 01/05/2010
• Est. Priority Date: 01/23/2004
• Status: Active Grant

• Current Assignee: Kilgore Flares Co. LLC (Chemring Group PLC)
• Original Assignee: Kilgore Flares Co. LLC (Chemring Group PLC)
• Inventors: Dailey, John W., Herbage, David W.
• Primary Examiner(s): Carone; Michael
• Assistant Examiner(s): Lee; Benjamin P
• Application Number:
  US10/763,789
• Time in Patent Office: 2,174 Days
• Field of Search: 102/336, 102/338, 102/345, 102/346, 102/334, 102/335, 102/340, 102/342, 102/351, 102/357, 102/364, 102/505, 102/288, 102/361, D22/112
• US Class Current: 102/336
• CPC Class Codes: C06B 21/0041 by compression
• CPC Class Codes: C06C 15/00 Pyrophoric compositions; Flints chemical lighters C06C9/00; alloys in general C22C
• CPC Class Codes: F42B 12/70 for dispensing radar chaff or infrared material radar-reflector targets, active targets transmitting infrared radiation F41J2/00; radar-reflecting surfaces H01Q15/14
• CPC Class Codes: F42B 4/26 Flares; Torches mines for practice or training containing flares or illuminating charges F42B8/28; projectiles of illuminating type F42B12/42
• CPC Class Codes: F42B 5/15 for creating a screening or decoy effect, e.g. using radar chaff or infrared material infrared flares F42B4/26

Abstract

The present invention relates to a flare pellet assembly for generating visual and/or infrared energy output, and to methods of making and using the same. The flare pellet assembly generally includes a stack of flare pellets, the individual pellets of which may exhibit an at least generally tapering geometry. These flare pellets may be stacked in a manner that substantially prevents motion of one flare pellet relative to another flare pellet. This stacked arrangement of the flare pellets, along with one or more grooves that may be defined in and/or between adjacent flare pellets, may be said to at least generally enable the resultant flare pellet assembly to provide one or both infrared and visual energy output that reaches desired countermeasure energy output specifications without sacrificing structural integrity of the flare pellet assembly.

Claims

1. A pyrotechnic flare pellet assembly for providing at least one of visual and infrared energy output comprising:

a plurality of ignitable pyrotechnic flare pellets arranged in a stack;

a means for joining said stack of said plurality of pellets whereby said stack remains joined upon ejection from a flare launcher;

each of said plurality of pellets having tapered edges whereby the center of each of said plurality of pellets is thicker than the edges of the pellet; and

a plurality of tapered grooves defined between said tapered edges of said pellets, said plurality of tapered grooves axially aligned with a longitudinal axis of said stack and disposed about the circumference of said stack.

2. The pyrotechnic flare pellet assembly of claim 1 further comprising:

said means is a rod that extends through said pellet assembly.

3. The pyrotechnic flare pellet assembly of claim 2 further comprising:

said means is an adhesive intermediate to said rod and said pellets.

4. The pyrotechnic flare pellet assembly of claim 2 further comprising:

said means is an adhesive intermediate to said pellets.

5. The pyrotechnic flare pellet assembly of claim 3 further comprising:

said means is a wrap disposed about said stack of pellets.

6. The pyrotechnic flare pellet assembly of claim 1 further comprising:

said plurality of pellets are disk shaped.

7. The pyrotechnic flare pellet assembly of claim 1 further comprising:

said plurality of pellets are shaped in the form of a frustum.

8. The pyrotechnic flare pellet assembly of claim 1 further comprising:

each of said plurality of tapered grooves having an interior angle of between about 5° and

about 35°

.

9. The pyrotechnic flare pellet assembly of claim 1 further comprising:

said plurality of pellets are substantially identical in size and design.

10. The pyrotechnic flare pellet assembly of claim 1 further comprising:

said plurality of pellets are bi-convex disks.