Patents by Inventor Marc C. Oliason

Marc C. Oliason 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: 4743056
    Abstract: Improved lifting tongs are provided which are particularly suitable for use in lifting heavy sections of cylindrical pipe. The lifting tongs are comprised of first and second opposing jaws and first and second mounting plates which are respectively rigidly joined to the first and second jaws. The mounting plates are arranged in mutually overlapping parallel disposition in spaced separation from each other. First and Second crank or cam levers are interposed in the gap between the mounting plates, and are rotatably secured relative thereto. The crank levers have cam lobes which act against corresponding cam surfaces on the jaws to force the jaws together with about a 4 to 1 mechanical advantage when the tongs are lifted.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: May 10, 1988
    Inventor: Marc C. Oliason