Patents by Inventor Helmut Kempf

Helmut Kempf 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).

  • Patent number: 4798418
    Abstract: The vehicle wheel comprises a rim containing an external closed ring and an internal rim ring composed of three segments and connected to a segmentally separated or segment-shaped divided disc. The beads of the pneumatic tire lie in grooves disposed between the external closed ring and the internal rim ring. Each of these grooves is formed by a bead seat, a vertical web and the external closed ring. Due to the internal pressure of the air in the pneumatic tire, each tire bead is drawn against clamping surfaces of the associated groove and sealed in relation to the external closed ring.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: January 17, 1989
    Assignee: Georg Fischer Aktiengesellschaft
    Inventors: Helmut Kempf, Hans Kopp