Patents by Inventor James E. Hearn

James E. Hearn 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).

  • Pulse welder and method of using same
    Patent number: 7304269
    Abstract: An electric arc welder for performing a pulse welding process by a current between an advancing electrode and workpiece where the welder comprises a short detecting circuit for creating a short signal upon occurrence of a short circuit between the advancing electrode and the workpiece and a boost circuit to create a plasma boost pulse after the short circuit is cleared during the time period when the welder is not outputting the peak pulse current.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: December 4, 2007
    Assignee: Lincoln Global, Inc.
    Inventors: Bruce E. Fulmer, James E. Hearn, Christopher Hsu, Steven R. Peters