Patent ID: 7409828

Claim:
A control device having a changeover valve, a pump delivering operating medium, in particular a motor-operated pump or a hand pump, connection devices for connecting the control device to at least two tools, in particular a first lifting cylinder and a second lifting cylinder, the changeover valve being operable in particular by hand, wherein a) the changeover valve, when the operator lets go of it, can be brought automatically into a basic position in which no pressure build-up in the region of the tools is possible, b) a control valve is provided between the changeover valve and the tools, and the control valve has a basic position in which the operating medium located in the respective operating-medium line cannot flow off to the changeover valve or cannot flow off to the changeover valve in substantial quantities, c) the control valve ( 7 ) comprises a proportional valve and can be operated manually, d) a load-holding state is set in the basic position of the changeover valve as well as of the control valve, and e) two or more tools are controllable with the control valve.