Patent ID: 6913437

Claim:
A hydrodynamic component comprising first and second cooperating rotatable impellers which are shaped and positioned for defining a working chamber between them in a working circuit, wherein the impellers are so-shaped that rotation or halting of one impeller when an operating medium is present in the working chamber tends to respectively rotate or halt the other impeller, the working chamber having an inlet for supply of operating medium thereto and having an outlet for exit of operating medium therefrom; a drive to the first impeller; a driven connection to the second impeller for being driven by rotation of the second impeller; a pressure-tight closed circuit coupled to the working chamber inlet; a device selectively operable for at least one of filling and emptying the closed circuit of operating medium and for predefining the pressure to the closed circuit, and a junction from the device to the closed circuit; a pressure-tight connection between the device for predefining pressure and the closed circuit; the device for predefining pressure comprising a device for producing a static superimposed pressure in the closed circuit, the device for predefining pressure comprises a container fillable with an operating medium and the container being attached at the junction to the circuit in a pressure tight manner; and a device for supplying air pressure to the container of the device for predefining pressure.