Patents by Inventor Otto W. Stuckmann

Otto W. Stuckmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluid pump having a pressure sealed motor chamber
    Patent number: 5478222
    Abstract: A pump of compact design, which is hermetically sealed to the outside and has no shaft lead-outs to the outside, includes a housing with an internal partition dividing the inside of the housing into a drive section and a pump section. A single shaft, which is supported in the partition, carries on one side the rotor of an electric drive motor and on the other side the impeller of the pump. In the cavity of the drive section, a gas pressure is generated which assists in preventing the pumping material from passing into the drive section.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: December 26, 1995
    Inventors: Gotz Heidelberg, Peter Ehrhart, Otto W. Stuckmann, Roland Fischer