Patent ID: 6612336
Filing Date: 2003-09-02
Classification: B62D,Y10T

Abstract:
A rotary disk valve for a power steering system of a motor vehicle, comprising:a valve housing; a valve inlet element; a first valve element non-rotatably connected to the valve inlet element; a valve outlet element; a second valve element non-rotatably connected to the valve outlet element; a torsion bar spring; a mechanical drive including a dead travel coupling; and a first roller bearing; and a second roller bearing, the first roller bearing and the second roller bearing supporting the first valve element in the second valve element; wherein the first valve element is connected to the valve outlet element via the torsion bar spring and the dead travel coupling; wherein the first valve element and the second valve element are arranged in the valve housing coaxially movable into each other and rotatable relative to each other by at most an amount of torsion of the dead travel coupling; wherein a radially external one of the first valve element and the second valve element includes internal longitudinal control grooves and a radially internal one of the first valve element and the second valve element includes external longitudinal control grooves, the internal longitudinal control grooves and the external longitudinal control grooves interacting to control a pressure medium to and from two working spaces of a servo motor and to a return connection for a pressure medium container; and wherein a return from the longitudinal control grooves of the radially internal valve element controls the return to the return connection via the first roller bearing.