Patent ID: 6422126
Filing Date: 2002-07-23
Classification: B62D,F16F

Abstract:
A power steering apparatus, comprising a control valve for switching and connecting a pump side supply flow passage and a tank side return flow passage to a first chamber and a second chamber of a power cylinder in accordance with a steering operation and interposing a damper valve between each of the first chamber and the second chamber of the power cylinder and the control valve,a damper valve having a housing, a partition member for partitioning an inner portion of the housing into a power cylinder side and a control valve side, a first valve apparatus provided in the partition member and allowing only a supply direction flow from the control valve side to the power cylinder side, and a second valve apparatus provided in the partition member arranged and constructed to apply a damping force to a return direction flow from the power cylinder side to the control valve side, wherein the second valve apparatus of the damper valve has a valve plate which is in contact with and apart from said partition member so as to open and close a through flow passage provided in the partition member, and having a fluid storing recess portion in a contact area between the partition member and the valve plate.