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Pressure regulating composite cartridge

  • US 5,259,288 A
  • Filed: 09/28/1992
  • Issued: 11/09/1993
  • Est. Priority Date: 02/09/1988
  • Status: Expired due to Term
First Claim
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1. A cartridge for use in a rifle having a cartridge receiving chamber, said cartridge comprising a head interfitted with a plastic casing, said casing having a bullet end and a head end, said bullet end having a bullet receiving recess adapted to receive a bullet in a frictional engagement and having a pressure regulating front partition separating said bullet recess from a powder chamber, said pressure regulating front partition being molded integrally with said casing and having a frangible annulus whereby said partition resists removal thereof until a predetermined pressure is achieved in said chamber by an ignited propellant charge, said casing further providing a space between said partition and said bullet whereby, upon propellant ignition and separation of the partition, said space is pressurized before movement of the projectile begins to stabilize said casing adjacent to said space against said chamber;

  • an external interlock surface at said head end, a cartridge head having a casing engaging recess at one end thereof and a primer receiving recess in the other end thereof, said casing engaging recess receiving said casing therein and extending toward said bullet receiving end around the outside of said external interlock surface and fairing with said casing.

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