Национальный Технический Университет Украины "Киевский Политехнический Институт"
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A digital actuator comprises a cylinder with covers, output rod and bit pistons with stop pins, airtight flash chambers formed by pistons and power supply channels. In axial cylindrical borings of low order pistons a rod is placed with channels for pressure delivery to unloading chambers. The rod is fixed to cylinder blank end cover by one end, and other end thereof, which length equal to or more than cumulative value of displacement of low order pistons, is arranged in the unloading chamber of the high order piston.