Polymer cartridge having a primer insert with a primer pocket groove
First Claim
1. A polymeric ammunition cartridge comprising:
- a primer insert comprising;
a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface;
a coupling element that extends from the bottom surface, wherein the coupling element is adapted to receive a polymer overmolding;
a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall;
a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive the polymer overmolding to form a flash hole;
one or more pads positioned on the recess bottom; and
a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive the polymer overmolding;
a substantially cylindrical polymeric middle body extending about the primer insert, wherein the substantially cylindrical polymeric middle body comprises;
a substantially cylindrical polymeric bullet-end coupling element at a first end of the substantially cylindrical polymeric middle body opposite a substantially cylindrical polymeric coupling end connected by a powder chamber, wherein the substantially cylindrical polymeric coupling end extends over the substantially cylindrical coupling element and into the primer flash hole aperture and into the groove; and
a substantially cylindrical polymeric bullet-end upper portion comprising a bullet-end coupling element connected to the substantially cylindrical polymeric bullet-end coupling element opposite a projectile aperture adapted to engage a bullet.
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0 Petitions
Accused Products
Abstract
The present invention provides an ammunition cartridge having a primer insert having a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and one or more pads positioned on the recess bottom; a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive a polymer overmolding.
299 Citations
17 Claims
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1. A polymeric ammunition cartridge comprising:
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a primer insert comprising; a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive the polymer overmolding to form a flash hole; one or more pads positioned on the recess bottom; and a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive the polymer overmolding; a substantially cylindrical polymeric middle body extending about the primer insert, wherein the substantially cylindrical polymeric middle body comprises;
a substantially cylindrical polymeric bullet-end coupling element at a first end of the substantially cylindrical polymeric middle body opposite a substantially cylindrical polymeric coupling end connected by a powder chamber, wherein the substantially cylindrical polymeric coupling end extends over the substantially cylindrical coupling element and into the primer flash hole aperture and into the groove; anda substantially cylindrical polymeric bullet-end upper portion comprising a bullet-end coupling element connected to the substantially cylindrical polymeric bullet-end coupling element opposite a projectile aperture adapted to engage a bullet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification