Patents by Inventor Howard Earl Mitchell

Howard Earl Mitchell 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).

  • Locking apparatus for earth boring cutter or stabilizer
    Patent number: 4046206
    Abstract: The rolling cutter or stabilizer member of a rotary drill string unit is effectively locked in place by a locking device. The device allows the cutter or stabilizer member to carry radial, tangential and axial loads. A support member includes a surface positioned perpendicular to the resultant of the expected radial load and tangential load. A support shaft includes a slabbed-off surface positioned perpendicular to the resultant of said resultant loads and said axial load.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: September 6, 1977
    Assignee: Dresser Industries, Inc.
    Inventor: Howard Earl Mitchell