Patents by Inventor Brian A. Graville

Brian A. Graville 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).

  • Pulsed arc welding apparatus
    Patent number: 4620082
    Abstract: A method of pulsed arc welding and an apparatus for carrying out the method, employ welding current pulses having an amplitude greater than the value of a background current. The arc voltage is sensed to provide a signal for controlling the frequency of the welding current pulses to counteract variations in electrode wire feed speed or spacing of the electrode from the workpiece.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: October 28, 1986
    Assignee: Welding Institute of Canada
    Inventors: Brian A. Graville, Edward Shmakov