Patent ID: 6578357
Filing Date: 2003-06-17
Classification: E21F,F15B

Abstract:
Control unit for at least two tools driven by a pressurized medium, comprising a delivery circuit for the pressurized medium for each tool and at least one pressure generator and a control device comprising control valves in the delivery circuits for the tools, the control valves being placed in a flow connection as required by at least one connecting passage, and in which two control valves are arranged in a common valve housing containing the connecting passage, characterized in that a control valve is provided for each delivery circuit for the tools, the control valve is provided as a rotary disk valve with a valve body of a substantially cylindrical shape, which is pivotally mounted in the valve housing provided with flow passages, the valve body is provided with at least one bore which provides a flow connection between inlet and outlet ports, and the inlet and outlet ports of the bore are arranged in an end face of the valve body, and each control valve has three setting positions, whereby when the control valves are in a first setting position each of the tools is supplied by one of the independent delivery circuits, and when one control valve is in a second setting position and the other control valve is in the first setting position, the flow of medium from the pressure generator via the connecting passage is fed from the control valve in the second setting position to the control valve in the first setting position so that the output delivered from the pressure generator can be concentrated on one tool, and when the control valves are in a third setting position, delivery is shut off.