Primer Insert Having a Primer Pocket Groove

Patent metadata

Field	Value
Publication number	US-2018266799-A1
Application number	US-201815936872-A
Country	US
Kind code	A1
Filing date	Mar 27, 2018
Priority date	Nov 10, 2010
Publication date	Sep 20, 2018
Grant date	—

Abstract

The present invention provides a primer insert for use in a polymeric ammunition cartridge includes atop surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and one or more pads positioned on the recess bottom; a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive a polymer overmolding.

First claim

What is claimed is:

1 . A primer insert for use in a polymeric ammunition cartridge comprising:
a top surface opposite a bottom surface and a extraction flange that extends circumferentially about an outer edge of the top surface; a coupling element that extends from the bottom surface, wherein the substantially cylindrical coupling element is adapted to receive a polymer overmolding; a primer recess in the top surface that extends toward the bottom surface, wherein the primer recess comprises a recess bottom and a circular recess side wall; a primer flash aperture through the recess bottom that extends through the bottom surface, wherein the primer flash aperture is adapted to receive a polymer overmolding to form a flash hole; and one or more pads positioned on the recess bottom; a groove in the primer recess positioned around the primer flash aperture to extend at least partially over the recess bottom and adapted to receive a polymer overmolding.

2 . The primer insert of claim 1 , wherein the one or more pads comprise 3 pads.

3 . The primer insert of claim 1 , wherein the one or more pads comprise 2-6 pads.

4 . The primer insert of claim 1 , wherein the one or more pads are positioned to align with the primer.

5 . The primer insert of claim 1 , wherein the one or more pads are positioned to align with an anvil of the primer.

6 . The primer insert of claim 1 , wherein the one or more pads are shaped to support an anvil of the primer.

7 . The primer insert of claim 1 , wherein the coupling element comprises an inner surface adapted to receive a polymer overmolding and an outer surface adapted to receive a polymer overmolding.

8 . The primer insert of claim 1 , further comprising an outer molding groove that extends circumferentially about an outer edge of the top surface.

9 . The primer insert of claim 1 , wherein the primer insert has a caliber selected from .223, .243, .25-06, .270, .300, .308, .338, .30-30, .30-06, .45-70 or .50-90, 50 caliber, 45 caliber, 380 caliber or 38 caliber, 5.56 mm, 6 mm, 7 mm, 7.62 mm, 8 mm, 9 mm, 10 mm, or 12.7 mm.

10 . The primer insert of claim 1 , wherein the primer insert is a 5.56 mm, 7.62 mm, .223, 308, 338, 12.7 mm, and .50 caliber primer insert.

11 . The primer insert of claim 1 , wherein the primer insert comprises a metal, an alloy, a polymer or a ceramic alloy.

12 . The primer insert of claim 1 , wherein the primer insert comprises steel, nickel, chromium, copper, carbon, iron, stainless steel or brass.

13 . The primer insert of claim 1 , wherein the primer insert comprises a 102, 174, 201, 202, 300, 302, 303, 304, 308, 309, 316, 316L, 316Ti, 321, 405, 408, 409, 410, 415, 416, 416R, 420, 430, 439, 440, 446 or 601-665 grade stainless steel.

14 . The primer insert of claim 1 , wherein the primer insert comprises a Ti 6 Al 4 V.

15 . The primer insert of claim 1 , wherein the primer insert comprises a groove texture.

Assignees

• True Velocity Inc

Inventors

• Burrow Lonnie

Classifications

• C22C33/0285

  with Cr, Co, or Ni having a minimum content higher than 5% · CPC title

• F42B33/00 Primary

  Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor (F42B5/188 takes precedence; manufacturing processes for hollow charges F42B1/036; manufacture of blasting cartridge initiators F42B3/195) · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• B22F3/004

  Filling molds with powder (feeding material to presses in general B30B15/302) · CPC title

• F42C19/083

  characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap · CPC title