Patents by Inventor Frank-Stefan Runte

Frank-Stefan Runte 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 for forming an end area of a workpiece
    Patent number: 6708548
    Abstract: The invention relates to a device for forming an end area of a workpiece (2), especially for cold press-forming an end area of a pipe, comprising two force transmitting elements (7, 9) which are guided in a common housing (3). The device is characterised in that a first pressure chamber (26) is located between the two force transmission elements (7, 9) and in that a second pressure chamber (28) is allocated to the second force transmission element (9). When the first force transmission element (7) is in the bracing position, the second force transmission element (9) can be displaced in relation to the first force transmission element (7) in order to form the workpiece.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: March 23, 2004
    Assignee: Parker-Hannifin GmbH
    Inventors: Dieter Ehrke, Udo Hunkenschroeder, Frank-Stefan Runte, Martin Ziehl
  • Device for forming an end area of a workpiece
    Publication number: 20030046969
    Abstract: The invention relates to a device for forming an end area of a workpiece (2), especially for cold press-forming an end area of a pipe, comprising two force transmitting elements (7, 9) which are guided in a common housing (3). The device is characterised in that a first pressure chamber (26) is located between the two force transmission elements (7, 9) and in that a second pressure chamber (28) is allocated to the second force transmission element (9). When the first force transmission element (7) is in the bracing position, the second force transmission element (9) can be displaced in relation to the first force transmission element (7) in order to form the workpiece.
    Type: Application
    Filed: September 30, 2002
    Publication date: March 13, 2003
    Inventors: Dieter Ehrke, Udo Hunkenschroeder, Frank-Stefan Runte, Martin Ziehl