Patents by Inventor Stefan Riekehr

Stefan Riekehr 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).

  • Process for joining workpieces made of zinc-containing aluminum alloys by laser beam welding
    Patent number: 9089929
    Abstract: The present invention relates to a process for joining workpieces made of zinc-containing aluminum alloys by laser beam welding, in which process a layer consisting of vanadium is introduced into the joining gap between the workpieces to be connected to avoid the formation of pores, and the workpieces are then connected to one another by laser beam welding.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 28, 2015
    Assignee: Helmholtz-Zentrum Geesthacht Zentrum für Material-und Küstenforschung GmbH
    Inventors: Stefan Riekehr, Herman Iwan, Rene Dinse, Volker Ventzke, Peter Haack
  • METHOD FOR THE SUBSEQUENT TREATMENT OF WELDED CONNECTIONS
    Publication number: 20080277458
    Abstract: A method for the subsequent treatment of welded connections is shown and described. The object of providing a method for the subsequent treatment of a weld by which the tensile stresses in the region of the weld are reduced is achieved by applying a top layer to the weld on a workpiece by cold-gas spraying.
    Type: Application
    Filed: May 9, 2008
    Publication date: November 13, 2008
    Applicant: GKSS-FORSCHUNGSZENTRUM GEESTCHACHT GMBH
    Inventors: Mustafa Kocak, Stefan Riekehr, Waman Vishwanath Vaidya, Frank Gartner, Thorsten Stoltenhoff, Heinrich Kreye, Thomas Klassen