Patents by Inventor Stefan Bobbert

Stefan Bobbert 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).

  • Method and device for forming a workpiece by application of a high internal pressure
    Patent number: 6282934
    Abstract: The invention relates to a process and an apparatus for the internal high-pressure forming of a workpiece in a closed internal high-pressure forming die. In the present invention, the workpiece is expanded by a fluidic internal high pressure exerted by a pressure generator and the workpiece is brought to bear against the cavity of the forming die. To improve the process reliability during the internal high-pressure forming of the workpiece, it is proposed to introduce the internal high pressure in the form of a pressure oscillation.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: September 4, 2001
    Assignee: DaimlerChrysler AG
    Inventors: Arndt Bikert, Stefan Bobbert