US 11,733,015 B2
Multi-piece primer insert for polymer ammunition
Lonnie Burrow, Carrollton, TX (US); Christopher William Overton, Wylie, TX (US); Florian Herzog, Dallas, TX (US); Nimmy Mammoottil, Richardson, TX (US); and Andrew Rosek, Rockwall, TX (US)
Assigned to TRUE VELOCITY IP HOLDINGS, LLC, Garland, TX (US)
Filed by TRUE VELOCITY IP HOLDINGS, LLC, Garland, TX (US)
Filed on Jul. 2, 2019, as Appl. No. 16/460,131.
Claims priority of provisional application 62/694,868, filed on Jul. 6, 2018.
Prior Publication US 2020/0011645 A1, Jan. 9, 2020
Int. Cl. F42C 19/08 (2006.01)
CPC F42C 19/083 (2013.01) 20 Claims
OG exemplary drawing
 
1. A two piece pressed primer insert engaged to an ammunition cartridge having a projectile aperture integrally connected to a cartridge body at a first end of the cartridge body, wherein the cartridge body is molded over the two piece pressed primer insert at a second end of the cartridge body that is opposite from the first end and defines a propellant chamber between the first end and the second end, the two piece pressed primer insert comprising:
a first primer insert portion comprising: a cylindrical insert coupling element having an insert tip at one end opposite a cylindrical first primer insert portion joining region, and an insert transition located between the insert tip and the cylindrical first primer insert portion joining region;
a second primer insert portion comprising: an inner surface connected to an extraction flange by a cylindrical second primer insert portion joining region, a primer recess located within the cylindrical second primer insert portion joining region, a primer flash aperture extending through the inner surface into the primer recess, and a flash aperture groove around the primer flash aperture in the primer recess;
an insert joint extending between the cylindrical second primer insert portion joining region and the cylindrical first primer insert portion joining region, wherein the insert joint is configured to frictionally fit the cylindrical first primer insert portion joining region about the cylindrical second primer insert portion joining region to form the two piece pressed primer insert; and
a support structure extending vertically from the insert joint about a portion of the cylindrical insert coupling element, the support structure at least partially covered by the second end of the cartridge body and configured to provide lateral support about the first primer insert portion.