Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 4, 2007
Patent Application Number
10450772
Date Filed
December 22, 2000
Patent Primary Examiner
Patent abstract
The method is provided for operating a pump unit with a centrifugal pump which is driven by an electric motor and which comprises a rotor running in a split tube. The rotor space is separated with respect to the stator in a fluid-tight manner. On running the motor to its operational rotational speed the fluid located in the rotor space due to the increasing rotational speed evaporates and is removed so that the motor finally functions as a dry-runner.
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