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Lightweight polymer ammunition cartridge casings

  • US 8,561,543 B2
  • Filed: 11/09/2011
  • Issued: 10/22/2013
  • Est. Priority Date: 11/10/2010
  • Status: Active Grant
First Claim
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1. A polymeric ammunition cartridge comprising:

  • a substantially cylindrical insert comprisinga 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, anda flange that extends circumferentially about an outer edge of the top surface; and

    a substantially cylindrical polymeric middle body comprisinga substantially cylindrical polymeric bullet-end anda 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 an circumferential surface of the primer flash hole.

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