Patents by Inventor Joel S. Oldham

Joel S. Oldham 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).

  • Sealing ring for drilling tool cutters
    Patent number: 4199156
    Abstract: An earth boring tool having journals with rotary cone cutters thereon wherein an internal lubricant exerts pressure on one side of the sealing means and pressurized drilling mud exerts external pressure against outwardly accessible portions of the sealing means, the sealing means having sealing contact with the journal leg or support axially of the journal and also with the rotary cone cutter radially of the journal and the cutter, and the sealing means being constructed and arranged to maintain sealing engagement with one of the journal leg and cutter as the cutter tilts relative to the axis of the journal in the normal operation of the earth boring tool.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: April 22, 1980
    Assignee: Smith International, Inc.
    Inventors: Joel S. Oldham, Timothy L. Landerville