Patents by Inventor DuWayne L. Bertsch

DuWayne L. Bertsch 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 apparatus for conducting smut-free stud welding
    Patent number: 4306137
    Abstract: A method and apparatus for welding studs to a workpiece are provided. When the studs are welded to workpieces using a drawn-arc, stud welding technique, sometimes a coating of smut is deposited on the workpiece around the welded end of the stud. This coating detracts from the appearance of the stud and workpiece. Further, if the workpiece is to be covered with a coating material, the coating of smut must first be removed, resulting in an extra operation. It has been found that the coating of smut will not be deposited if, during the stud welding cycle, gas is directed toward the weld area in a swirling manner around the end of stud where the weld occurs.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: December 15, 1981
    Assignee: TRW Inc.
    Inventors: Thomas E. Shoup, DuWayne L. Bertsch