SHUT-OFF DEVICE MOVING DRIVE Russian patent published in 2019 - IPC F15B15/02 F16K31/122 

FIELD: machine building.

SUBSTANCE: shut-off device moving drive consists of housing with bottom and cover, equipped with the control medium supply and removal fittings, reciprocating action piston located in the housing internal cavity and made in the form of a hollow cylinder, with two thrust bushings, inside of which configured to rotate rod is placed. Between the reciprocating action piston inner surface and the rod, the additional rotary action piston is arranged, equipped with the non-self-braking thread, which interacts with the mating non-self-braking, made on the rod and enabling the rod rotation, and the rotary action piston is fixed against the reciprocating action piston rotation. On the reciprocating action piston outer surface the annular grooves with through holes are made, connecting the cavities below and above the rotary action piston, with located on the housing fittings for the control medium supply and removal, intended for the rotary action piston.

EFFECT: invention is aimed at increase in the torque.

3 cl, 2 dwg