Base insert for polymer ammunition cartridges

• US 9,989,343 B2
• Filed: 03/20/2017
• Issued: 06/05/2018
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: Pcp Tactical, LLC
• Original Assignee: Pcp Tactical, LLC
• Inventors: Padgett, Charles, Wiley, Sy
• Primary Examiner(s): Morgan, Derrick R
• Application Number:
  US15/463,906
• Publication Number:
  US 20170191812A1
• Time in Patent Office: 442 Days
• Field of Search: 102432, 102431, 102430, 102439, 102464, 102465, 102466, 102467, 102469, 102470
• CPC Class Codes: B29C 65/72 by combined operations or combined techniques, e.g. welding and stitching
• CPC Class Codes: B29C 69/001 a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts for reinforced material B29C70/545; B29C49/4278, B29C51/268 take precedence
• CPC Class Codes: B29K 2096/00 Use of specified macromolecular materials not provided for in a single one of main groups B29K2001/00 - B29K2095/00, as moulding material
• CPC Class Codes: B29L 2031/7772 Cartridges
• CPC Class Codes: F42B 3/24 Cartridge closures or seals top closures for shotgun ammunition cartridges F42B7/12
• CPC Class Codes: F42B 33/00 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 Class Codes: F42B 5/30 of plastics , i.e. the cartridge-case tube is of plastics
• CPC Class Codes: F42B 5/307 formed by assembling several elements
• CPC Class Codes: F42B 5/313 all elements made of plastics
• CPC Class Codes: F42C 19/083 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 Class Codes: F42C 19/10 Percussion caps

Abstract

An insert for a high strength polymer-based cartridge casing can include an outside, an inside formed within the insert, and a back end disposed at a rear of the cartridge casing. The back end includes a rim and groove disposed around the outside of the insert and a primer pocket disposed inside the back end. Also included is a front end, opposite the back end, having an overmolded area disposed around the outside of the insert above the primer pocket and a basin, having a depth, formed inside the overmolded area. A flash hole can be included inside the insert and communicating between the primer pocket and the basin. The flash hole has a perimeter and a ring disposed around the perimeter of the flash hole, including a height starting at a bottom of the basin, disposed toward the front end, and less than the depth of the basin.

Claims

1. An insert for a high strength polymer-based cartridge casing comprising:

an outside;

an inside formed within the insert;

a back end disposed at a rear of the insert, comprising;

a rim and groove disposed around the outside of the insert; and

a primer pocket disposed inside the back end;

a front end, opposite the back end, comprising;

an overmolded area disposed around the outside of the insert above the primer pocket; and

a basin, having a depth, formed inside the overmolded area;

a flash hole, inside the insert and communicating between the primer pocket and basin, comprising a perimeter; and

a ring disposed around the perimeter of the flash hole, comprising a height starting at a bottom of the basin, disposed toward the front end, and less than the depth of the basin,

wherein the insert is formed from at least one of a metal and metal alloy.

2. The insert for a high strength polymer-based cartridge casing of claim 1, further comprising:

a ridge formed on the overmolded area; and

a key formed on the ridge;

wherein the key comprises at least one of a flat portion, a raised portion, or dimples.