LEVER MECHANISM OF A HYDRAULIC VALVE

When the piston of servomotor 1 is moved downward by the action of fluid delivered to the cylinder, cable 2, running over round pulleys 7, 6 and 9 and attached to the servomotor housing at point a, turns lever 3 about fixed axis A. This lifts stem 4 which has pin d sliding in slot b of lever 3. The conical tip at the lower end of stem 4 opens the hole in valve seat 5, screwed into the body of the …