Patents by Inventor Roger S. Lambson

Roger S. Lambson 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).

  • Disc cutters for rock working machines
    Patent number: 4793427
    Abstract: A hardmetal ring is a size for size or low interference fit on the body of a disc cutter of a rock working machine, such as a boxhole borer. In one embodiment the ring is gable shaped and clamped between a fixed annular shoulder and a detachable annular shoulder. In another embodiment the ring is triangular in section and two annular shoulders resting on it and inclined surfaces on the body clamp the ring to the body.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: December 27, 1988
    Assignee: Boart International Limited
    Inventors: Roger S. Lambson, Noel C. Pope, Vaughan Griffiths