Patents by Inventor Hartmut Berndt

Hartmut Berndt 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).

  • Immersion pump, especially for low-boiling fluids
    Patent number: 4948348
    Abstract: An immersion pump, especially for low-boiling fluids, having a support for a shaft and a ferromagnetic impeller wheel mounted to the shaft. The support includes at least one controllable electromagnet that operates to axially support and position the impeller wheel. An outlet path is also provided to enable vapor bubbles within the moving fluid to escape from the pump and be returned to the liquid supply.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: August 14, 1990
    Inventors: Robert Doll, Werner Wiedemann, Hartmut Berndt