Patents by Inventor Robert G. Toth

Robert G. Toth 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).

  • Bearing structure for downhole motors
    Patent number: 4720199
    Abstract: A unitary sleeve mounts both thrust and radial bearings, the radial bearing being fabricated of macro-crystalline tungsten carbide powder and cemented tungsten carbide cobalt chips in a recessed area on an elongated extension and the thrust bearing comprising a ring carrying diamond inserts residing in through holes, the ring and inserts being brazed on a hub at the thrust head end of the extension.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: January 19, 1988
    Assignee: Smith International, Inc.
    Inventors: Bela Geczy, James N. McPherson, Robert G. Toth
  • Tungsten carbide chips-matrix bearing
    Patent number: 4719076
    Abstract: A blend of tungsten carbide powder and cemented tungsten carbide cobalt chips is loaded into a cavity surrounding a steel bearing blank and infiltrated with a copper base infiltrant to create a chip matrix bearing surface.
    Type: Grant
    Filed: November 5, 1985
    Date of Patent: January 12, 1988
    Assignee: Smith International, Inc.
    Inventors: Bela Geczy, Robert G. Toth