Patent ID: 7469625
Filing Date: 2008-12-30
Classification: F15B,Y10T

Abstract:
1. Hydraulic transmission actuator comprising a piston/cylinder unit having an actuating piston system longitudinally displaceably arranged in a cylinder housing so as to divide the cylinder chamber into at least two pressure chambers which are actable upon by hydraulic oil by control conduits, at least one piston rod connected with the actuating piston system, and a sealing element arranged on the actuating piston system, to seal off the pressure chambers from one another, wherein the diameter of the cylinder housing is locally reduced for selectively increasing the radial contact pressure force of the sealing element with respect to an interior wall of the cylinder housing, and wherein a diameter of the cylinder housing in a left and right operating position spaced from a center position of the actuating piston system is reduced with respect to a diameter of the cylinder housing in the center position of the actuating piston system,