The present invention provides a subsonic ammunition including a polymeric casing body comprising a generally cylindrical hollow polymer body having a body base at a first end thereof and a mouth at a second end to define a propellant chamber; a propellant insert positioned in the propellant chamber
The present invention provides a subsonic ammunition including a polymeric casing body comprising a generally cylindrical hollow polymer body having a body base at a first end thereof and a mouth at a second end to define a propellant chamber; a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber, wherein the propellant chamber has an internal volume that is at least 10% less than the open internal volume of a standard casing of equivalent caliber; a propellant disposed and confined within the propellant chamber; a primer insert positioned at the body base and in communication with the propellant chamber; a primer disposed in the primer insert in combustible communication with the propellant; and a projectile frictionally fitted in the mouth in combustible communication with the propellant.
대표청구항▼
1. A subsonic ammunition comprising: a primer insert comprises a top surface opposite a bottom surface, a substantially cylindrical coupling element extending away from the bottom surface forming, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture posi
1. A subsonic ammunition comprising: a primer insert comprises a top surface opposite a bottom surface, a substantially cylindrical coupling element extending away from the bottom surface forming, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture positioned in the primer recess to extend through the bottom surface, a flash aperture groove in the primer recess that extends circumferentially about the primer flash aperture, and a flange that extends circumferentially about an outer edge of the top surface;a polymeric casing body comprising a generally cylindrical hollow polymer body molded over the substantially cylindrical coupling element, into the primer flash aperture and into the flash aperture groove and extending toward a forward end opening;a propellant chamber formed between the forward end opening and the primer flash aperture;a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber by at least 10%;a propellant disposed in the propellant chamber;a primer disposed in the primer recess in combustible communication with the propellant; anda projectile frictionally fitted in the forward end opening in combustible communication with the propellant. 2. The subsonic ammunition of claim 1, wherein the internal volume that is about 10.5, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25% less than the open internal volume of a standard casing of equivalent caliber. 3. The subsonic ammunition of claim 1, wherein the projectile does not exceed the velocity of 1200 feet per second at sea level under standard atmospheric conditions when fired. 4. The subsonic ammunition of claim 1, wherein the projectile does not exceed the velocity of 1086 feet per second at standard atmospheric conditions when fired. 5. The subsonic ammunition of claim 1, wherein the projectile is secured to the forward end opening by a mechanical interference, adhesive, ultrasonic welding, the combination of molding in place and adhesive, and hot crimping after the act of molding. 6. The subsonic ammunition of claim 1, wherein the polymer body comprises a material selected from the group consisting of polyphenylsulfone, polycarbonate, and polyamide. 7. The subsonic ammunition of claim 1, further comprising at least one additive selected from the group consisting of plasticizers, lubricants, molding agents, fillers, thermo-oxidative stabilizers, flame-retardants, coloring agents, compatibilizers, impact modifiers, release agents, reinforcing fibers and reinforcing agents. 8. The subsonic ammunition of claim 1, wherein the propellant insert has a substantially cylindrical shape. 9. The subsonic ammunition of claim 1, wherein the propellant insert has a free formed shape. 10. The subsonic ammunition of claim 1, wherein the propellant insert has a one or more ribs extending into the propellant chamber. 11. The subsonic ammunition of claim 1, wherein the propellant insert has a radial cross-section selected from the group consisting of circular, ovoid, octagonal, hexagonal, triangular, star, ribbed, square and a combination thereof. 12. The subsonic ammunition of claim 1, wherein the radial cross-section of the propellant chamber is irregular along its longitudinal length. 13. The subsonic ammunition of claim 1, wherein the radial size of the propellant chamber tapers along its longitudinal direction. 14. The subsonic ammunition of claim 1, wherein the polymeric casing body and propellant insert are formed of different polymeric materials. 15. The subsonic ammunition of claim 1, wherein the polymeric casing body and propellant insert are formed of the same polymeric materials. 16. The subsonic ammunition of claim 1, wherein the propellant chamber is formed of a separate propellant insert disposed within the internal cavity of the generally cylindrical hollow polymer body. 17. The subsonic ammunition of claim 1, wherein the polymeric casing body comprises a polymers selected from the group consisting of 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 or 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, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, urethane hybrids, polyphenylsulfones, copolymers of polyphenylsulfones with polyethersulfones or polysulfones, copolymers of poly-phenylsulfones with siloxanes, blends of polyphenylsulfones with polysiloxanes, poly(etherimide-siloxane) copolymers, blends of polyetherimides and polysiloxanes, and blends of polyetherimides and poly(etherimide-siloxane) copolymers. 18. The subsonic ammunition of claim 1, wherein the propellant insert comprises a polymers selected from the group consisting of 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 or 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, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, urethane hybrids, polyphenylsulfones, copolymers of polyphenylsulfones with polyethersulfones or polysulfones, copolymers of poly-phenylsulfones with siloxanes, blends of polyphenylsulfones with polysiloxanes, poly(etherimide-siloxane) copolymers, blends of polyetherimides and polysiloxanes, and blends of polyetherimides and poly(etherimide-siloxane) copolymers. 19. The subsonic ammunition of claim 1, wherein the internal volume that is about 10.5, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25% less than the open internal volume of a standard casing of equivalent caliber. 20. The subsonic ammunition of claim 1, wherein the projectile is 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 projectile. 21. The subsonic ammunition of claim 1, further comprising a diffuser ring having a diffuser aperture positioned in the primer recess to contact the primer and the primer flash aperture is aligned with the diffuser aperture. 22. A subsonic ammunition case comprising: a primer insert comprising a top surface opposite a bottom surface, a substantially cylindrical coupling element extending away from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash aperture positioned in the primer recess to extend through the bottom surface, a flash aperture groove in the primer recess that extends circumferentially about the primer flash aperture, and a flange that extends circumferentially about an outer edge of the top surface; a polymeric casing mid-body comprising a generally cylindrical hollow polymer body molded over the substantially cylindrical coupling element and through the primer flash aperture into the flash aperture groove, and extending to a mid-body coupling joint;a propellant chamber formed between the mid-body coupling joint and the primer flash aperture;a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber by at least 10%;a nose comprising a projectile aperture opposite a nose coupler a shoulder located between the projectile aperture and the nose coupler to reduce the diameter; a neck that extends from the shoulder to the projectile aperture, wherein the nose coupler is connected to the mid-body coupling joint;a propellant deposited in the propellant chamber;a primer disposed in the primer recess in combustible communication with the propellant; anda projectile inserted into the projectile aperture. 23. The subsonic ammunition of claim 22, wherein the projectile is 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 projectile. 24. The subsonic ammunition of claim 22, further comprising a diffuser ring having a diffuser aperture positioned in the primer recess to contact the primer and the primer flash aperture is aligned with the diffuser aperture.
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