Patents by Inventor Klaus Lempenauer

Klaus Lempenauer 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).

  • Device and method for mechanically joining sheet metal
    Patent number: 6862913
    Abstract: The present invention is directed to a method and a device for clinching metal sheets disposed one over the other in planar fashion. A joining tool, composed of a punch and a die having an anvil, is used to jointly displace metal sheets, profiles, or multi-sheet connections, out of the sheet-metal plane, under the action of forming energy introduced by ultrasound, compressing and integrally connecting the same.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: March 8, 2005
    Assignee: DaimlerChrysler AG
    Inventors: Klaus Lempenauer, Detlef Nowotni, Volkmar Schuler
  • Device and method for mechanically joining sheet metal
    Publication number: 20030115927
    Abstract: The present invention is directed to a method and a device for clinching metal sheets disposed one over the other in planar fashion. A joining tool, composed of a punch and a die having an anvil, is used to jointly displace metal sheets, profiles, or multi-sheet connections, out of the sheet-metal plane, under the action of forming energy introduced by ultrasound, compressing and integrally connecting the same.
    Type: Application
    Filed: December 11, 2002
    Publication date: June 26, 2003
    Applicant: DaimlerChrysler AG
    Inventors: Klaus Lempenauer, Detlef Nowotni, Volkmar Schuler
  • Nickel-base superalloy
    Patent number: 5294239
    Abstract: In section bars and shaped bodies made of nickel-base superalloys having a structure consisting of columnar grains, a complete recrystallization cannot be effected unless the heating-up rate is kept below a maximum heating-up rate T.sub.max, which depends on the ratio V of one or more of the metal carbide-forming elements hafnium, niobium, tantalum, titanium and zirconium to one or both of the metal carbide-forming elements tungsten and molybdenum.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 15, 1994
    Assignee: PM Hochtemperatur-Metall GmbH
    Inventors: Klaus Zoltzer, Klaus Lempenauer, Hellmut Fischmeister