Polymer ammunition cartridge having a wicking texturing

摘要

One embodiment of the present invention provides a polymeric ammunition cartridge having wicking texturing.

主权项

1. A polymeric ammunition cartridge 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 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; and a textured projectile aperture surface about an inner surface of the projectile aperture, wherein the textured projectile aperture surface couples the projectile to the projectile aperture.