Polymer ammunition having a projectile made by metal injection molding
First Claim
1. An ammunition having a metal injection molded projectile and a polymer cartridge case comprising:
- a polymer ammunition cartridge comprisinga primer insert comprising a top surface opposite a bottom surface,a primer recess extending into the top surface toward the bottom surface,a flash aperture positioned in the primer recess and extending through the bottom surface;
a groove positioned inside the primer recess around the flash aperture anda coupler extending away from the bottom surface;
a mid-body molded from a mid-body coupler over the coupler and into the flash aperture to from a flash hole;
a nose portion comprising a nose coupler connected to the mid-body coupler and extending to a projectile aperture;
a propellant chamber formed between the projectile aperture and the flash hole;
a primer inserted into the primer recess;
a propellant at least partially filling the propellant chamber; and
a metal injection molded projectile frictionally fitted in the projectile aperture, wherein the metal injection molded projectile comprises a nose extending essentially symmetrically to a shoulder, and an essentially cylindrical bearing surface extending from the shoulder to a base.
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Accused Products
Abstract
The present invention provides an ammunition having a metal injection molded projectile and a polymer cartridge case comprising a polymer ammunition cartridge comprising a bottom portion and a top portion that enclose a propellant chamber, wherein the bottom portion comprises a primer recess in communication with a primer flash hole that extends into a propellant chamber and the top portion comprises a projectile aperture; a primer inserted into the primer flash hole aperture; a propellant at least partially filling the propellant chamber; and a metal injection molded projectile frictionally fitted in the projectile aperture, wherein the metal injection molded projectile comprises a nose extending essentially symmetrically to a shoulder, and an essentially cylindrical bearing surface extending from the shoulder to a base.
291 Citations
21 Claims
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1. An ammunition having a metal injection molded projectile and a polymer cartridge case comprising:
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a polymer ammunition cartridge comprising a primer insert comprising a top surface opposite a bottom surface, a primer recess extending into the top surface toward the bottom surface, a flash aperture positioned in the primer recess and extending through the bottom surface; a groove positioned inside the primer recess around the flash aperture and a coupler extending away from the bottom surface; a mid-body molded from a mid-body coupler over the coupler and into the flash aperture to from a flash hole; a nose portion comprising a nose coupler connected to the mid-body coupler and extending to a projectile aperture; a propellant chamber formed between the projectile aperture and the flash hole; a primer inserted into the primer recess; a propellant at least partially filling the propellant chamber; and a metal injection molded projectile frictionally fitted in the projectile aperture, wherein the metal injection molded projectile comprises a nose extending essentially symmetrically to a shoulder, and an essentially cylindrical bearing surface extending from the shoulder to a base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification