Mannesmann Rexroth Corporation

Rudolf Schaffer

Jorg Dantlgraber

Alfred Feuser

Helmut Kunkel

A proportional valve has an output proportional to an electrical input signal. In a preferred embodiment, the valve is actuated by a proportional solenoid having a coil which is controlled by a control signal in proportion to voltage or current. The proportional solenoid is controlled by a relatively high current such as a rectified mains voltage. A control circuit ensures that the coil of the proportional solenoid is not overloaded. Particularly, it ensures that a maximum current value is not exceeded. In this way, the mains supply required in prior art devices may be eliminated.

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Marktheidenfeld, Germany

Rudolf Schaffer