Setting motor with switching-off device, with at least one compression spring between free piston and working piston

摘要

The setting motor has a servo cylinder (1) with a working piston and an annular free piston. There is at least one compression spring between the free piston and the working piston, fitted so that with equal pressure in the two cavities (12, 13), an angle arises between the longitudinal axes of the two pistons, but when the pressure is unequal, the axes are in line with each other.