CARTRIDGE FOR SMOOTH-BORE GUN Russian patent published in 2014 - IPC F42B5/02 

FIELD: weapons and ammunition.

SUBSTANCE: cartridge includes a cylindrical case, a propellant charge, an igniter capsule, a propellant element and a piston. The piston is installed in the bottom part of the case. The piston includes an outer cylindrical surface and contacts the inner surface of the case. The piston has through holes at an angle of inclination to a horizontal plane of the piston for the passage of gases from the propellant charge. The propellant charge is arranged throughout the free volume of the case. The piston is connected to the propellant element in a detachable way. The direction of thread is matched with the direction of the inclination angle of the through holes of the piston. The diameter of the propellant element in the bottom and middle parts is smaller than the inner diameter of the case and diverges conically on the other end to the diameter of the piston and is changed over to a cylinder, and then to an ogival section.

EFFECT: increasing the propellant element velocity.

1 dwg