Patents by Inventor Fred Rausch

Fred Rausch 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).

  • Hydraulic displacement machine having gears pressed toward each other
    Patent number: 5730589
    Abstract: A hydraulic displacement machine including two external gears located in the machine housing and meshing with each other, with the teeth of the two gears sealingly engaging the inner surface of the housing, and with meshing teeth of the two gears sealing the two port regions from each other, and an arrangement for communicating pressure prevailing in the port region of the housing having a higher pressure to the port region of the housing having a lower pressure over a circumference of each of the two gears.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: March 24, 1998
    Assignee: John S. Barnes GmbH
    Inventors: Fred Rausch, Horst Weidhaas