Patents by Inventor Brian C. Muma

Brian C. Muma 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).

  • Screw ring cone retention apparatus and method for rock bits
    Patent number: 4538928
    Abstract: This invention teaches a means to retain a cutter cone onto a journal bearing of an earth boring rotary cone rock bit. Complementary and registering annular grooves are formed in the bearing surfaces of the journal and the cone. A tangential entry groove transitions from an end of the journal to the annular groove in the journal. Simultaneous 360.degree. rotation and axial movement of the cone over the journal, in combination with a ring distortion ramp block in the cone, threads an end of a split cone retention ring through the entry groove in the journal into the registering annular grooves, thereby retaining the cone on the journal.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: September 3, 1985
    Assignee: Smith International, Inc.
    Inventor: Brian C. Muma