VALVING HEAD Russian patent published in 1997 - IPC

FIELD: valving. SUBSTANCE: valving head is made up as a movable and fixed disks with openings. The rod, which interacts with movable disk, is provided with a split spring washer that arrests the axial movement of the rod. The end face of the housing is provided with a stop made up as an arc-like concentric projection. The rod is coupled with the arrester interacting with the side stop planes of the projection at the end angular positions of the rod. The rod has lateral grooves. Inside the spring washer are surfaces answering to the grooves. The washer is fixed in the grooves. The arrester is made up as a radial projection on the washer, which is arranged with a radial spaced relation between the projection and stop. EFFECT: enhanced reliability. cl, dwg