Polymer ammunition cartridge having a two-piece primer insert
First Claim
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1. An ammunition cartridge having a two piece primer insert comprising:
- a two piece primer insert comprising;
an upper primer insert portion connected to a lower primer insert portion,wherein the upper primer insert portion comprises an upper primer bottom surface, an upper primer aperture through the upper primer bottom surface, a substantially cylindrical coupling element extending away from the upper primer bottom surface, and an upper primer top surface configured to abut a lower primer bottom surface,wherein the lower primer insert portion comprises;
a lower primer top surface opposite the lower primer bottom surface, a primer recess in the lower primer top surface that extends toward the lower primer bottom surface and adapted to fit a primer, a lower flash hole aperture through the lower primer bottom surface extending to the primer recess, wherein the lower flash hole aperture is larger than the upper primer aperture;
a polymeric middle body extending from a middle body coupling region over the two piece primer insert and into the lower flash hole aperture to form a flash hole, wherein the polymeric middle body comprises a first polymer;
a polymeric nose portion comprising a nose coupler connected to the middle body coupling region, a shoulder extending from the nose coupler, a neck extending from the shoulder and a projectile aperture in the neck, wherein the nose portion comprises a second polymer; and
a propellant chamber defined between the flash hole and the projectile aperture.
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Abstract
The present invention provides ammunition cartridge having a two piece primer insert with a flange, a polymeric middle body extending from the primer insert to a cylindrical middle body coupling region, and a polymeric projectile end having a projectile aperture mated to the polymeric middle body.
241 Citations
14 Claims
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1. An ammunition cartridge having a two piece primer insert comprising:
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a two piece primer insert comprising;
an upper primer insert portion connected to a lower primer insert portion,wherein the upper primer insert portion comprises an upper primer bottom surface, an upper primer aperture through the upper primer bottom surface, a substantially cylindrical coupling element extending away from the upper primer bottom surface, and an upper primer top surface configured to abut a lower primer bottom surface, wherein the lower primer insert portion comprises;
a lower primer top surface opposite the lower primer bottom surface, a primer recess in the lower primer top surface that extends toward the lower primer bottom surface and adapted to fit a primer, a lower flash hole aperture through the lower primer bottom surface extending to the primer recess, wherein the lower flash hole aperture is larger than the upper primer aperture;a polymeric middle body extending from a middle body coupling region over the two piece primer insert and into the lower flash hole aperture to form a flash hole, wherein the polymeric middle body comprises a first polymer; a polymeric nose portion comprising a nose coupler connected to the middle body coupling region, a shoulder extending from the nose coupler, a neck extending from the shoulder and a projectile aperture in the neck, wherein the nose portion comprises a second polymer; and a propellant chamber defined between the flash hole and the projectile aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification