Patents by Inventor Graham M. Ruark

Graham M. Ruark 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).

  • Tong load cell assembly
    Patent number: 5245877
    Abstract: An apparatus and method including a load cell mounting apparatus movably mounted on a load cell which applies either of two types of loads to the load cell as one type of load. The apparatus and method for applying either a tensile load or a compressive load to a load cell as a tensile load; and a tong assembly with such apparatus or in another aspect, for applying either a tensile load or a compressive load to a load cell as a compressive load; and, a tong assembly with such apparatus.
    Type: Grant
    Filed: March 12, 1991
    Date of Patent: September 21, 1993
    Assignee: Weatherford U.S., Inc.
    Inventor: Graham M. Ruark