Stamped primer insert for use in polymer ammunition

Patent metadata

Field	Value
Publication number	US-11085739-B2
Application number	US-201816151734-A
Country	US
Kind code	B2
Filing date	Oct 4, 2018
Priority date	Nov 10, 2010
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

One embodiment of the present invention provides a stamped metal primer insert for a polymeric ammunition cartridge comprising: a top surface having a stamped flange that extends circumferentially about an outer edge of the top surface; a stamped coupling element that extends from the flange to a coupling tip; a stamped inner coupling element from the coupling tip to a bottom surface, wherein the bottom surface is opposite the top surface; a stamped primer recess in the top surface that extends toward the bottom surface; a primer flash aperture in the primer recess through the bottom surface; and a groove stamped in the primer recess around the primer flash aperture adapted to receive a polymer overmolding.

First claim

What is claimed is:

1. A stamped metal primer insert for a polymeric ammunition cartridge comprising:
a top surface having a stamped flange that extends circumferentially about an outer edge of the top surface;
a stamped coupling element that extends from the flange to a coupling tip;
a stamped inner coupling element from the coupling tip to a bottom surface, wherein the bottom surface is opposite the top surface;
a stamped primer recess in the top surface that extends toward the bottom surface;
a primer flash aperture in the primer recess through the bottom surface; and
a groove stamped in the primer recess around the primer flash aperture adapted to receive a polymer overmolding.

2. The insert of claim 1 , further comprising a texture applied to the stamped coupling element.

3. The insert of claim 2 , wherein the texture comprises grooves, ridges, knurling, hatching, lines, free formed lines, free formed grooves, patterns or combinations thereof.

4. The insert of claim 1 , further comprising a texture applied to the stamped inner coupling element.

5. The insert of claim 4 , wherein the texture comprises grooves, ridges, knurling, hatching, lines, free formed lines, free formed grooves, patterns or combinations thereof.

6. The insert of claim 1 , further comprising a texture applied to the stamped coupling element and the stamped inner coupling element.

7. The insert of claim 1 , wherein the primer flash aperture is larger than a flash hole in a standard primer insert of the same caliber.

8. The insert of claim 1 , wherein the primer flash aperture is larger than a flash hole in a standard primer insert of the same caliber to allow polymer overmolding into the primer flash aperture.

9. The insert of claim 1 , wherein the metal primer insert is a 5.56 mm, 7.62 mm, 0.223, 308, 338, 3030, 3006, and 0.50 caliber primer insert.

10. The insert of claim 1 , wherein the metal primer insert is a 380 caliber, 38 caliber, 9 mm, 10 mm, 20 mm, 25 mm, 30 mm, 40 mm, 45 caliber and the like.

11. The insert of claim 1 , wherein the insert blank is a metal, an alloy, or a ceramic alloy.

12. The insert of claim 1 , wherein the insert blank is stainless steel or brass.

13. The insert of claim 1 , wherein the insert blank is 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 insert of claim 1 , wherein the insert blank is a Ti 6 Al 4 V.

Assignees

• True Velocity Ip Holdings Llc

Inventors

• Burrow Lonnie

Classifications

• F42B5/30 Primary

  of plastics {, i.e. the cartridge-case tube is of plastics} · CPC title

• F42B5/307 Primary

  formed by assembling several elements · CPC title

• C22C38/58

  with more than 1.5% by weight of manganese · CPC title

• C22C38/48

  with niobium or tantalum · CPC title

• C22C38/44

  with molybdenum or tungsten · CPC title