Patents by Inventor Erwin Zimmermann

Erwin Zimmermann 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).

  • Compressor system having a device for continuous cleaning of the auxiliary or working liquid
    Patent number: 5456827
    Abstract: The auxiliary or working liquid is cleaned by being urged through a pervaporation membrane module (3), then the permeate stream from the membrane module is led through a condenser (4), where the impurities concentrated in the permeate stream precipitate. The stream of retentate and the stream of permeate from the membrane module are then fed back to a compressor (1). The differential pressure of the compressor belonging to the compressor system is used to operate this circuit.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: October 10, 1995
    Assignees: SIHI GmbH & Co KG, GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Karl-Heinz Nikutta, Dietmar Gosch, Erwin Zimmermann, Klaus Ohlrogge, Jan Wind, Klaus-Viktor Peinemann
  • Apparatus for filling a hollow and closed system provided with only one filling aperture
    Patent number: 4149574
    Abstract: Apparatus for selectively charging and evacuating a separate liquid system such as an engine cooling system, refrigeration system or the like and having a liquid storage tank, a single fluid pump and valve means for selectively connecting both the pump inlet and pump outlet for either pumping liquid from the storage tank via a connector conduit to the separate system or from the separate system via the connector conduit to the storage tank.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: April 17, 1979
    Assignee: Sihi GmbH & Co.
    Inventors: Wilfried Lehmann, Erwin Zimmermann