SLOT GATE Russian patent published in 2003 - IPC

FIELD: pipeline valves and fittings. SUBSTANCE: proposed slot gate is designed for closing air ducts and vacuum lines and for use as discharge devices. Slot gate has seat with slot through hole and motion drive including bellows whose fixed stopper is made for connection with pressure building device. Shutoff member is installed on movable stopper. Bellows have outline in cross section whose longitudinal dimension along larger axis exceeds its cross dimensions along smaller axis. Outer contours of bellows corrugations are interconnected by cross bridges with formation of holes through which all parts of inner space of bellows communicate. EFFECT: simplified design, reduced materials usage and overall dimensions of gate. 2 cl, 3 dwg