Primer diffuser for polymer ammunition cartridges

Patent metadata

Field	Value
Publication number	US-2017191813-A9
Application number	US-201514731731-A
Country	US
Kind code	A9
Filing date	Jun 5, 2015
Priority date	Nov 10, 2010
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present invention provides a diffuser cup or ring adapted to hold a primer used in an ammunition cartridge comprising a bottom surface sized to fit in a primer recess for an ammunition cartridge; a diffuser aperture positioned through the bottom surface and aligned with a flash hole; a cup wall attached to the bottom surface and extending away from the bottom surface; and an interior cavity bordered by the cup wall and the bottom surface and sized to frictionally fit a primer.

First claim

1 . A diffuser cup adapted to hold a primer used in an ammunition cartridge, comprising:
a bottom surface sized to fit in a primer recess for the ammunition cartridge; a diffuser aperture positioned through the bottom surface and aligned with a flash hole in the ammunition cartridge; a cup wall attached to the bottom surface and extending away from the bottom surface; and an interior cavity bordered by the cup wall and the bottom surface and sized to frictionally fit the primer.

2 . The diffuser cup of claim 1 , wherein the diffuser cup comprises a metal, an alloy, a composite, or a polymer.

3 . The diffuser cup of claim 1 , further comprising an adhesive applied to the bottom surface to contact the primer.

4 . The diffuser cup of claim 1 , further comprising an adhesive applied to the bottom surface to contact the primer recess.

5 . The diffuser cup of claim 1 , further comprising a primer positioned in the interior cavity.

6 . A diffuser ring adapted to separate a primer and a primer recess in an ammunition cartridge comprising:
a diffuser ring sized to fit in a primer recess for an ammunition cartridge having a bottom surface opposite a top surface; and a diffuser aperture positioned through the bottom surface and the top surface to align with a flash hole of the ammunition cartridge.

7 . The diffuser ring of claim 6 , wherein the diffuser ring comprises a metal, an alloy, a composite or a polymer.

8 . The diffuser ring of claim 6 , further comprising an adhesive applied to the bottom surface to contact a primer.

9 . The diffuser ring of claim 6 , further comprising an adhesive applied to the bottom surface to contact the primer recess.

10 . The diffuser ring of claim 6 , further comprising an adhesive applied to the top surface to contact the primer.

11 . The diffuser ring of claim 6 , further comprising a primer positioned in the interior cavity.

12 . The diffuser cup of claim 1 , wherein the diffuser cup comprises tungsten or brass.

13 . The diffuser cup of claim 1 , wherein the diffuser cup comprises tungsten metal powder, nylon 6/6, nylon 6, or glass fibers.

14 . The diffuser cup of claim 1 , wherein the diffuser cup comprises polyurethane prepolymer, cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, nylon, polyether imide, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride, thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile-butadinen-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, urethane hybrids, aliphatic or aromatic polyamide, polyeitherimide, polysulfone, polyphenylsulfone, poly-phenylene oxide, liquid crystalline polymer, or polyketone.

15 . The diffuser cup of claim 1 , wherein the diffuser cup comprises polyphenylsulfone reinforced with one or more reinforcing materials selected from glass fiber, ceramic fiber, carbon fiber, mineral fillers, organo nanoclay, or carbon nanotube.

16 . The diffuser cup of claim 1 , wherein the diffuser cup comprises polyphenylsulfones; copolymers of polyphenylsulfones with polyether-sulfones or polysulfones; copolymers and blends of polyphenylsulfones with polysiloxanes; poly(etherimide-siloxane); copolymers and blends of polyetherimides and polysiloxanes; blends of polyetherimides or poly(etherimide-siloxane) copolymers.

17 . The diffuser cup of claim 1 , wherein the primer fits a .22, .22-250, .223, .243, .25-06, .270, .300, .30-30, .30-40, 30.06, .300, .303, .308, .338, .357, .38, .380, .40, .44, .45, .45-70, .50 BMG, 5.45 mm, 5.56 mm, 6.5 mm, 6.8 mm, 7 mm, 7.62 mm, 8 mm, 9 mm, 10 mm, 12.7 mm, 14.5 mm, 20 mm, 25 mm, 30 mm, or 40 mm ammunition cartridge.

18 . A polymer diffuser cup adapted to hold a primer used in an ammunition cartridge, comprising:
a polymer bottom surface sized to removably fit in a primer recess for the ammunition cartridge; a diffuser aperture positioned through the polymer bottom surface and aligned with a flash hole in the ammunition cartridge; a polymer cup wall attached to the polymer bottom surface and extending away from the polymer bottom surface; and an interior cavity bordered by the polymer cup wall and the polymer bottom surface and sized to frictionally fit the primer.

Assignees

• True Velocity Inc

Inventors

• Burrow Lonnie

Classifications

• F42C19/10

  Percussion caps · CPC title

• F42C19/0807 Primary

  characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters · CPC title