US 12,247,818 B2
Polymer ammunition article designed for use across a wide temperature range
Charles Padgett, Sebastian, FL (US); Mark A. Sanner, Mt. Vernon, IN (US); Ernest Ford Caldwell, Bergen op Zoom (NL); Gerould Harding, Pittsfield, MA (US); and Christopher Wall, Pittsfield, MA (US)
Assigned to PCP Tactical, LLC, Sebastian, FL (US)
Appl. No. 17/293,724
Filed by PCP TACTICAL, LLC, Sebastian, FL (US)
PCT Filed Jul. 26, 2019, PCT No. PCT/US2019/043728
§ 371(c)(1), (2) Date May 13, 2021,
PCT Pub. No. WO2020/028182, PCT Pub. Date Feb. 6, 2020.
Claims priority of provisional application 62/760,732, filed on Nov. 13, 2018.
Prior Publication US 2022/0011078 A1, Jan. 13, 2022
Int. Cl. F42B 5/307 (2006.01)
CPC F42B 5/307 (2013.01) 7 Claims
OG exemplary drawing
 
1. An ammunition article comprising:
a polymer cartridge case comprising:
a mouth at a first end;
a second end opposite the first end; and
a propellant chamber located between the first end and the second end;
a projectile fitted into the mouth;
a metal base insert joined at the second end and comprising a primer;
wherein the metal base insert and the polymer cartridge case remain joined together as a single piece assembly upon loading, firing and removal from a chamber of a firearm for a polymer case temperature between about −65° F. (−54° C.) to 165° F. (74° C.), and
wherein the polymer cartridge comprises a polymer consisting essentially of a thermoplastic polymer, a polymer blend or mixtures thereof and may include homopolymers, copolymers or combinations thereof, and
wherein the polymer comprises about 5-10 wt % of milled glass.