Patent ID: 6062534
Filing Date: 2000-05-16
Classification: F16K,Y10T

Abstract:
A rotary valve actuator for fluid control valves comprising:a housing;a rotatable lever mounted in said housing for rotary movement;a first linearly movable actuating member mounted in said housing on one side of said rotatable lever for generating a linear actuating pulling movement;a first linkage connecting said first linearly movable actuating member to a first point on said rotatable lever for translating said linear actuating pulling movement of said first linearly movable actuating member to a rotary actuating movement of said rotatable lever;a second linearly movable actuating member mounted in said housing on the opposite side of said rotatable lever for generating a linear return pulling movement; anda second linkage connecting said second linearly movable member to a second point on said rotatable lever for translating the linear return pulling movement of said second linearly movable actuating member to a rotary actuating movement of said rotatable lever and with said first linkage and said second linkage maintained in constant tension.