Patents by Inventor Hans-Günther Haldenwanger

Hans-Günther Haldenwanger 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-piercing rivet
    Patent number: 6325584
    Abstract: A partially-hollow rivet (1), for joining aluminum sheets (3) and (7) by using the self-piercing technique, is made of light metal such as aluminum or an aluminum alloy, and the front (2) of the rivet base has a surface with a blunt shape.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: December 4, 2001
    Assignees: Richard Bergner GmbH, Audi AG
    Inventors: Ingobert Marko, Wolfgang Thomala, Hans-Günther Haldenwanger, Harald Kudliczka, Géorg Schmid
  • Process for increasing the wall thickness in hollow sections
    Patent number: 6321581
    Abstract: The invention relates to a process for producing a region of greater wall thickness in a longitudinal hollow section (1) which, to this end, is subjected to a radial and axial pressure and plastically deformed thereby. The hollow section (1) is secured in a matrix (2) corresponding to the section dimensions which has an enlarged cross section corresponding to the intended final dimensions of the hollow section (1) in the deformation region. The essential embodiment consists in that the deformation to attain an increased wall thickness (14) takes place in a region between the ends of the section. In addition, the wall thickness (19) can be increased at at least one of the ends of the section.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: November 27, 2001
    Assignee: Audi AG
    Inventors: Hans-Günther Haldenwanger, Jurgen Oswald, Frank Fischer, Holger Wenzel