Patents by Inventor Andreas Kobus

Andreas Kobus 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).

  • Method of operating a claw-type vacuum pump and a claw-type vacuum pump suitable for carrying out the method
    Patent number: 5660535
    Abstract: A method of operating a claw-type vacuum pump with two or more stages, each of which has a suction chamber with a pair of claw rotors and end-located suction and discharge ports. To avoid the possibility of liquids affecting operation of the pump, the invention proposes that the pump is operated without internal compression and that the gases emerging from at least one stage are cooled.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: August 26, 1997
    Assignee: Leybold Aktiengesellschaft
    Inventors: Andreas Kobus, Uwe Gottschlich, Lothar Brenner, Hartmut Kriehn