Patents by Inventor Karl-Christoph Exner

Karl-Christoph Exner 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).

  • Controlled pressure butt welding process and apparatus for carrying it out
    Patent number: 4959519
    Abstract: In a pressure butt welding process, in particular for welding chain link bent from round wire, the influence of disturbing factors on the quality of the welding result is compensated by measuring the welding forces F.sub.K exerted on the workpiece by the upsetting dies and setting and welding voltage applied to the workpiece according to the level of the measured forces F.sub.K. A control means adjusts the welding voltage via a thyristor control circuit and thereby the effective welding power in such a way that the welding forces F.sub.K remain constant.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: September 25, 1990
    Assignee: Meyer, Roth & Pastor Maschinenfabrik GmbH
    Inventors: Karl-Christoph Exner, Franz Reichow, Horst Becker