Patents by Inventor Willi Wortmann

Willi Wortmann 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).

  • Self-pumping hydro-pneumatic spring strut with internal leveling
    Patent number: 6234462
    Abstract: A spring strut having a delayed bleed. The spring strut includes a non-return valve arranged parallel to the throttle such that the flow of oil can pass through the non-return valve from the low-pressure chamber in the direction of the pump cylinder.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: May 22, 2001
    Assignee: Mannesmann Sachs AG
    Inventors: Hubert Beck, Werner Kuchheuser, Willi Wortmann