Patent ID: 6415719
Filing Date: 2002-07-09
Classification: F42B

Abstract:
A shot cartridge for guns, comprising:a cartridge case having a primer; a propellant disposed in said cartridge case proximate to said primer, shot disposed in said cartridge case; a first element in contact with said shot to define a first mass of shot and moving with said first mass of shot at least a distance upon firing to define a first mass of shot firing pattern of said first mass of shot and to define a first mass of shot firing distance of said first mass of said shot for a given amount of said propellant; a second element in contact with said shot to define a second mass of shot and moving with said second mass of shot at least a distance upon firing to define a second mass of shot firing pattern of said second mass of shot and to define a second mass of shot firing distance of said second mass of shot for a given amount of said propellant, said second mass of shot firing distance being greater than said first mass of shot firing distance and said first mass of shot firing pattern being different from said second mass of shot firing pattern, said first mass of shot being located near said propelling charge, said second mass of shot being located proximate to an exit mouth of said cartridge case, said second element being cup-shaped and having an end plate facing forward in the firing direction and having a side wall, said end plate, and said side wall defining an interior region containing said second mass of shot during initial trajectory, whereby said second element releases said second mass of shot to form said second mass of shot firing pattern, said first mass of shot being pushed by said first element for firing, said first element including a central tapering between a forward part and a reward part forming a two-way rotating wad and said second element turning over in flight to release said second mass of shot, said second element side wall having an external outer hollow at the level of the end plate and a tapering chamfer at a forward facing end, an external side of said end plate of said second element having a groove connected to said chamfer via a rounded connecting element of said a forward facing end of said side walls.