Patent ID: 6659129
Filing Date: 2003-12-09
Classification: B60T,Y10T

Abstract:
A valve arrangement, comprising:an operating valve arrangement including a housing defining a pressure medium input chamber, a pressure medium output chamber and a pressure medium outlet leading to a pressure medium sink, the operating valve arrangement further including an inlet and outlet valve arrangement via which the pressure medium output chamber is selectively connectable to the pressure medium input chamber or to the pressure medium outlet, or can be closed off from the pressure medium input chamber and the pressure medium outlet; and a control valve arrangement installed on the housing of the operating valve arrangement, the control valve arrangement including a pressure medium input chamber, a pressure medium output chamber and a pressure medium outlet, the control valve arrangement further including a controlled valve arrangement via which the pressure medium output chamber can be selectively connected to the pressure medium input chamber or to the pressure medium outlet of the control valve arrangement, the pressure medium outlet of the control valve arrangement being connected to the pressure medium outlet of the operating valve arrangement, wherein the controlled valve arrangement further comprises a first controlled valve serving as an inlet valve and second controlled valve serving as an outlet valve, the control valve arrangement further including a first control chamber and a first control piston which can be subjected to pressure by pressure medium within the first control chamber, the first control piston controlling actuation of the inlet valve, and a second control chamber and a second control piston which can be subjected to pressure by pressure medium within the second control chamber, the second control piston controlling actuation of the outlet valve, and the control valve arrangement further including a seat for the first control piston and a seat for the second control piston, the seat for the first control piston being formed by facing sides comprised of an area portion of the operating valve arrangement and an area portion of the control valve arrangement.