Patents by Inventor Robert L. Heflin

Robert L. Heflin 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).

  • Resistance welding apparatus and method
    Patent number: 4135075
    Abstract: In combination with a resistance spot welding machine for welding superimposed electrically conductive members an improved apparatus for and method of cleaning welding electrodes and associated portions of the members to be welded are provided utilizing inert gas cooperating with electrical circuitry such that a sequential cleaning of each electrode and its portions are provided which is self starting and ending as a function of the presence of sufficient inert gas.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: January 16, 1979
    Assignee: Reynolds Metals Company
    Inventor: Robert L. Heflin