Adhesive lip for a high strength polymer-based cartridge casing and manufacturing method

• US 8,875,633 B2
• Filed: 04/17/2013
• Issued: 11/04/2014
• Est. Priority Date: 01/14/2011
• Status: Active Grant

• Current Assignee: Pcp Tactical, LLC
• Original Assignee: Pcp Tactical, LLC
• Inventors: Padgett, Charles
• Primary Examiner(s): Hayes, Bret
• Assistant Examiner(s): MORGAN, DERRICK R
• Application Number:
  US13/865,040
• Publication Number:
  US 20140290522A1
• Time in Patent Office: 566 Days
• Field of Search: 102/431, 102/432, 102/464, 102/465, 102/466, 102/430, 102/436, 102/438, 102/439, 102/441, 102/455, 102/456, 102/467, 102/517
• US Class Current: 102/466
• 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

A high strength polymer-based cartridge casing can include a first end having a mouth and a neck extending away from the mouth. Next, a shoulder extends below the neck and away from the first end. The cartridge can have a frangible portion capable of being split upon discharge of a projectile. A projectile can be disposed in the mouth and a relief can be disposed on the neck near the mouth and projectile. The relief can form a gap between the neck and the projectile to receive an adhesive.

Claims

1. A high strength polymer-based cartridge casing inclosing a volume, comprising:

a first end having a mouth;

a neck extending away from the mouth;

a shoulder extending below the neck and away from the first end;

a bullet configured to impact a target and disposed in the mouth; and

a relief formed in the neck proximate to the mouth forming a gap between the neck and the bullet; and

an adhesive disposed in the gap and in contact with the bullet,

wherein at least the mouth, the neck, the shoulder and the relief are formed of at least one polymer.

2. The high strength polymer-based cartridge casing of claim 1, wherein the relief further comprises a frangible portion capable of being split upon discharge of the bullet;

wherein the split of the frangible portion prevents a second bullet from being disposed in the mouth.

3. A method of making a high strength polymer-based cartridge casing comprising the steps of:

molding a component using a polymer, comprising;

a first end having a mouth; and

a second end opposite the first end;

molding a neck extending away from the mouth, using a polymer;

molding a shoulder extending below the neck and away from the first end, using a polymer;

forming a relief on the neck, further forming a gap between the neck and a bullet configured to impact a target and disposed in the mouth; and

applying an adhesive in the gap between the neck and the bullet and the adhesive contacts the bullet.

4. The method of making a high strength polymer-based cartridge casing of claim 3, further comprising the step of forming a frangible portion, in the relief, capable of being split.