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US 9,835,423 B2Granted
Polymer ammunition having a wicking texturing
AssigneeTrue Velocity, Inc.
InventorLonnie Burrow
Life of this patent
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Abstract
One embodiment of the present invention provides a polymeric ammunition cartridge having a wicking texturing at the projectile aperture.
Claims15
A polymeric ammunition having wicking texturing comprising:
- a substantially cylindrical primer insert comprising
- a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element forms an outer surface opposite an inner circumferential 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 hole groove that extends circumferentially about the primer flash aperture in the primer recess, and
- a locking groove that extends circumferentially about the top surface;
- a substantially cylindrical polymeric middle body comprising a first polymer that extends from a cylindrical middle body coupling region to the substantially cylindrical primer insert, wherein the first polymer is over-molded over the substantially cylindrical coupling element to the locking groove and into the primer flash aperture to the flash hole groove;
- a primer inserted into the primer recess;
- a textured middle body surface on the cylindrical middle body coupling region;
- a substantially cylindrical polymeric projectile end mated to the substantially cylindrical polymeric middle body molded from a second polymer, wherein the substantially cylindrical polymeric projectile end comprises a projectile end coupling region that extends to a shoulder region that reduces to a neck region having a projectile aperture wherein the projectile end coupling region couples to the textured middle body surface;
- a propellant chamber defined between the primer flash aperture and the projectile aperture;
- a propellant at least partially filling the propellant chamber;
- a textured projectile aperture surface about an inner surface of the projectile aperture and extending onto the neck, wherein the textured projectile aperture surface couples the projectile to the projectile aperture by allowing an adhesive to flow down the textured projectile aperture surface;
- and
- a projectile frictionally fitted in the bullet-end aperture contacting the textured projectile aperture surface.
12 more elements
A polymeric ammunition having wicking texturing comprising:
- a primer insert comprising a top surface opposite a bottom surface and a coupling element that extends from the bottom surface, wherein the coupling element forms an outer surface opposite an inner circumferential 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 hole groove that extends circumferentially about the primer flash aperture in the primer recess, and a locking groove that extends circumferentially about the top surface;
- a polymeric middle body comprising a first polymer that extends from a cylindrical middle body coupling region to the primer insert wherein the first polymer is over-molded over the substantially cylindrical coupling element to the locking groove and into the primer flash aperture to the flash hole groove;
- a polymeric projectile end mated to the polymeric middle body, wherein the polymeric projectile end comprises a second polymer that forms a projectile end coupling region that extends to a shoulder region that reduces to a neck region having a projectile aperture wherein the projectile end coupling region couples to the middle body coupling region;
- a propellant chamber defined between the primer flash aperture and the projectile aperture;
- a primer inserted into the primer recess;
- a propellant at least partially filling the propellant chamber;
- a textured projectile aperture surface about an inner surface of the projectile aperture and extending onto the neck, wherein the textured projectile aperture surface couples the projectile to the projectile aperture by allowing an adhesive to flow down the textured projectile aperture surface;
- and
- a projectile frictionally fitted in the bullet-end aperture contacting the textured projectile aperture surface.
6 more elements
Dependencies are inferred from the claim text.