Patents by Inventor Stephan Hundertmark

Stephan Hundertmark 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).

  • Compound friction vacuum pump
    Patent number: 6890146
    Abstract: A friction vacuum pump (1) has at least one turbomolecular pump stage (6, 7) with a molecular pump stage (12, 13, 15) that is subsequently connected on the pressure side (3), and with a transition stage (23) mounted between the turbomolecular pump stage and the molecular pump stage. In order to improve the transition from the turbomolecular zone to the molecular zone, the transition stage has a flow section that is continuously tapered in the tangential by limiting surfaces (27, 28).
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: May 10, 2005
    Assignee: Leybold Vakuum GmbH
    Inventors: Roland Blumenthal, Stephan Hundertmark