ARTILLERY PIECE BREECH BLOCK Russian patent published in 2009 - IPC F41A3/00 

FIELD: weaponry.

SUBSTANCE: invention relates to artillery pieces, particularly, to breech blocks. The propose breech block incorporates a wedge fitted in a breech housing with the help of a crank seated on the axle perpendicular to the barrel bore axis and a gas check mounted on the frame. The said frame is linked up with the aforesaid wedge and can turn about the aforesaid crank axle. The frame turn axle and crank axle are arranged on the opposite sides of the barrel bore cross section midplane parallel to aforesaid axles. The breech block incorporates the mechanisms of one-way intermittent travel, mechanism of converting translation into rotation and mechanism converting rotation into translation. The frame turn axle can incorporate with the one-way intermittent travel mechanism pawl. Note that the frame is spring-loaded relative to the breech housing and linked up with the wedge via crank axle-to-one-way intermittent travel mechanism drive shaft linkage.

EFFECT: reduced overall dimensions and lower weight.

2 cl, 5 dwg