Patent ID: 9267772
Filing Date: 2016-02-23
CPC Classification: F42B

Claim Text:
1. A telescoped ammunition cartridge assembly, comprising: a case having a front end and a base end positioned along a longitudinal axis; a projectile positioned along the longitudinal axis towards the front end of the case; an endcap coupled to the front end of the case and adapted to retain the projectile entirely within the case; a primer positioned along the longitudinal axis towards the base end of the case; a primer support coupled to the base end of the case and adapted to support the primer within the case; a groove located on an interior surface of the primer support into which the primer expands under pressure during firing, wherein the primer is deformed to create a retaining ring that locks the primer to the primer support after the pressure is released; an exterior groove located on an exterior surface of the primer support, the exterior groove facing towards an inner surface of the case and providing retention support between the case and the primer support prior to firing; at least one obturating lip seal to seal at least one of the endcap or the primer support to the case; and a relief volume of air positioned between the case and at least one of the endcap or the primer support to maintain pressure within the case in the event propellant gasses escape during the initial stages of firing.