When lever 1 turns clockwise, cam 2, rigidly secured to lever 1, turns in the same direction and plungers 3 and 4 move to the left. At this, fluid flows from chamber a to chamber b through the clearance between pin 5 and the ring of valve 6 which is loaded by spring 7. When lever 1 turns counterclockwise, plungers 3 and 4 move to the right and the fluid flows from chamber b to chamber a along the same path. If lever 1 is turned suddenly clockwise, the plungers move rapidly to the left, developing high pressure in chamber a. Then, as the fluid flows from chamber a to chamber b, it opens ring valve 6 and compresses spring 7. Upon reversal of the plungers, fluid flows from chamber b to chamber a, opening conical valve 8 and compressing stronger spring 9. Fluid from in between the plungers can flow into chambers a and b through check valves 10 and 11, loaded by weak springs.
$3947$LHP,DC$