Patents by Inventor Friedbert Wissmann

Friedbert Wissmann 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).

  • Glide tube ring for tube-in-tube systems
    Patent number: 5592975
    Abstract: The present invention discloses a glide tube ring for tube-in-tube systems, pipe conduits and the like. The glide ring tube according to the invention is provided with axially spaced glides running parallel to each other whose material has the lowest possible friction coefficient, especially a plastic, preferably a fiberglass-reinforced polyethylene, polyamide or the like, in which the glide tube ring is attached to the central tube forming a closed ring that centers this tube in the protecting tube, pipe conduit or the like.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: January 14, 1997
    Assignees: SAAR-Gummiwerk GmbH, Friedbert Wissmann
    Inventors: Friedbert Wissmann, Paul Kientz, Bernd Skerra