Method of making a primer insert for use in polymer ammunition
First Claim
1. An injection molded primer insert for polymer ammunition comprising:
- a top surface opposite a bottom surface;
a substantially cylindrical coupling element extending away from the bottom surface forming an interior surface inside the substantially cylindrical coupling element;
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 positioned in the primer recess and extends around the primer flash aperture, wherein the flash hole groove is adapted to receive a polymer overmolding; and
a flange that extends circumferentially about an outer edge of the top surface.
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Accused Products
Abstract
One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface. The substantially cylindrical polymeric middle body includes a substantially cylindrical polymeric bullet-end and 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 covers a circumferential surface of the primer flash hole.
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Citations
5 Claims
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1. An injection molded primer insert for polymer ammunition comprising:
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a top surface opposite a bottom surface; a substantially cylindrical coupling element extending away from the bottom surface forming an interior surface inside the substantially cylindrical coupling element; 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 positioned in the primer recess and extends around the primer flash aperture, wherein the flash hole groove is adapted to receive a polymer overmolding; and a flange that extends circumferentially about an outer edge of the top surface. - View Dependent Claims (2, 3, 4, 5)
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Specification