MORTAR TUBE Russian patent published in 2018 - IPC F41F1/06 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to artillery armament of the ground forces. Mortar tube in its lower part is provided with an annular piston and is movably placed in an additional guide tube, closed with a lid on the top with a hole for the passage of the tube pipe, and the bottom is closed by a breech-hole with a ball bearing and a drummer with a striker. On the continuation of the tube pipe, which rests against the internal surface of the breech, through holes are made through holes for the escape of the propellant gases of the propellant charge into the gap between the piston and breech. Below the through holes, inside the tube, are the stops that hold the mine in the tube when the latter moves upwards. Ratio of the cross-sectional area of the tube and the area of the piston allows the propellant gases of the propellant charge to push the tube with the piston up to the stop in the top cover first and only then push the mine in the stopped tube.

EFFECT: length of the barrel is reduced without deterioration of its ballistics.

1 cl, 3 dwg