Patents by Inventor Paul C. Stewart

Paul C. Stewart 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).

  • Mining shovel ballast box connection method and apparatus
    Patent number: 4608743
    Abstract: The ballast box of a power mining shovel is coupled to the rotating frame by two pins installed through orifices in parallel plate projections extending from the ballast box and corresponding eye projections on the main rotating frame. In addition, the feet of the gantry rear legs are pinned through second orifices in the same parallel plate projections from the ballast box such that the force generated down the center of the longitudinal axis of the gantry rear leg is coupled through the centers of both of the orifices in the parallel plate projections.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: September 2, 1986
    Assignee: Dresser Industries, Inc.
    Inventor: Paul C. Stewart