Primer insert having a primer pocket groove

Patent metadata

Field	Value
Publication number	US-10480911-B2
Application number	US-201815936796-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Nov 10, 2010
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

The present invention provides a primer insert for use in a polymeric ammunition cartridge includes 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 a groove in the primer recess positioned around the primer flash aperture adapted to receive a polymer overmolding, wherein the groove extends at least partially over the bottom surface and the groove is adapted to receive polymer at least partially over the bottom surface.

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 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 the polymer overmolding to form a flash hole; and
a groove in the primer recess positioned around the primer flash aperture adapted to receive the polymer overmolding, wherein the groove extends at least partially over the recess bottom and the groove is adapted to receive polymer at least partially over the recess bottom.

2. The primer insert of claim 1 , wherein the groove extends about half the distance from the primer flash aperture to the circular recess side wall.

3. The primer insert of claim 1 , wherein the groove extends about one third the distance from the primer flash aperture to the circular recess side wall.

4. The primer insert of claim 1 , wherein the groove extends about two third the distance from the primer flash aperture to the circular recess side wall.

5. The primer insert of claim 1 , wherein the groove extends to about the circular recess side wall.

6. 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.

7. 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.

8. The primer insert of claim 1 , wherein the primer insert is a 5.56 mm, 7.62 mm, .223, 308, 338, 12.7mm, and 0.50 caliber primer insert.

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

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

11. 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.

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

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

Assignees

• True Velocity Ip Holdings Llc

Inventors

• Burrow Lonnie

Classifications

• 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

• F42C19/0807

  characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters · CPC title

• B22F3/225

  by injection molding · CPC title

• F42B33/001

  Devices or processes for assembling ammunition, cartridges or cartridge elements from parts · CPC title

• F42C19/0823

  Primers or igniters for the initiation or the propellant charge in a cartridged ammunition (primers for caseless ammunition F42C19/085) · CPC title