SUPER-HIGH-VACUUM VALVE Russian patent published in 1995 - IPC

FIELD: valving. SUBSTANCE: sealing member is coaxially mounted on the hollow valving member. The sealing member is made of a plastic material and has ring sealing surface. The spherical bearing member is received in the space of the valving member for permitting interaction with the contact surface of the pressing link. The ring collar is provided on the inner side of the valving member. The bearing member is made up as a trancated sphere with cylindrical shank and arranged for permitting contact of the spherical surface with the collar. The end face of the shank is in contact with the contact surface of the pressing link. The diameter of the contact surface is greater than the diameter of the shank. The bearing member is more hard than the collar. EFFECT: enhanced reliability. 11 dwg