DRIVE AND FAST STOP BLOCK FOR GUN WITH LINEAR FEED OF BREECHBLOCK OR ROUND Russian patent published in 2013 - IPC F41A7/08 F41A9/50 F41A9/51 F41A17/18 

FIELD: weapons and ammunition.

SUBSTANCE: drive with fast stop block of breechblock 3 or its holder axially displacing to gun barrel 1 comprises motor, two chains 6 running toward each other and chain drive sprockets 5. Actuating cams 7 and control cams 8 are arranged at said chains. Carriage 11 arranged below at breechblock to displace in two guide pins across fire direction has slot 12 to receive actuating cams of appropriate chain to catch the breechblock in fire direction forward and backward. Breechblock is stopped in front end position by actuating can getting out of said groove and displacement of carriage by control cam of the same chain to mid position. After shot, said carriage displaces from mid position to gun opposite side while at unmade shot it stays at its mid position so that neither cam can catch the breechblock backward.

EFFECT: automatic uncoupling of breechblock at ignition failure or delayed ignition.

6 cl, 5 dwg