Patents by Inventor Leo D. Lane

Leo D. Lane 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).

  • Patent number: 4243727
    Abstract: A tool joint hardfacing containing sintered tungsten carbide granules embedded in an alloy steel matrix, with the surface substantially free of protruding granules to decrease casing wear during well drilling. The hardfacing is applied in a single application by rotating the drill pipe, providing an arc between a consummable steel wire and the pipe to create a weld puddle, and reciprocating the wire parallel to the pipe axis to create a band. Sintered tungsten carbide granules are gravity fed from an orifice directly into the arc and precipitate toward the bottom of the matrix to provide a smooth surface. The bottom of the matrix appears to be harder than the top.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: January 6, 1981
    Assignee: Hughes Tool Company
    Inventors: Allen E. Wisler, Leo D. Lane