Patent ID: 6371439
Filing Date: 2002-04-16
Classification: F15B

Abstract:
A device for adjusting a central position of pistons and, accordingly, an angular position of a pinion in valve controlling actuators, comprising a tubular body, in which first and second pistons are tightly slidably arranged, said first and second pistons being provided with opposite racks meshing with a central pinion, said central pinion being adapted to turn through discrete angles, said device further comprising limiting means, accessible from an outside of said tubular body, for limiting the displacement of one of said pistons toward said pinion, wherein said limiting means comprise first limit means for limiting an inward displacement of one of said pistons, said first limit means including a stem having an unthreaded portion tightly passing via a gasket through said one piston and an adjoining threaded portion which can be engaged in a threaded seat formed in a recess of a head of the actuator, said unthreaded portion being provided with an enlarged head portion which can abut against an inner surface of said one piston.