Patents by Inventor David L. Pifer

David L. Pifer 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).

  • Submerged arc welding gun
    Patent number: 4347427
    Abstract: A submerged arc welding gun includes a housing having a bore extending therethrough. The housing includes a welding nozzle defining one end. Welding wire is directed through the bore of the housing to said nozzle. A flux tube is also disposed within the bore in spaced relation to the welding wire for delivering flux from a source thereof to the nozzle. The flux tube terminates substantially adjacent to the nozzle. The flux tube is connected to a source of pressure for feeding the flux through the tube to the nozzle.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: August 31, 1982
    Assignee: Elliott Turbomachinery Co., Inc.
    Inventors: Dennis R. Gentilo, Donald A. Smith, David L. Pifer