GATE Russian patent published in 1994 - IPC

FIELD: valving. SUBSTANCE: case is provided with guides, stops, seats, and valve member made of two plats coupled with a drive via a rod. The rod is provided with projection and spherical head. Inner surface of the plates have chamferings. Valve member is provided with a flexible members. The stop is made of an arresting collar. The projection of the rod is bounded by a spherical head. The plates are pressed to the rod by the flexible members and inclined to sealing surface to provide freely setting in the seats. The collars are positioned for pressing the plates to the seats by the head of the rod at closing the gate. EFFECT: enhanced reliability. 3 dwg