Patents by Inventor George B. Witman, IV

George B. Witman, IV 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).

  • Drill bit reservoir with controllable relief pressure
    Patent number: 7665547
    Abstract: A rotary rock bit includes a lubricant reservoir with a pressure compensation assembly disposed therein. The pressure compensation assembly is adapted to permit selective adjustment of the relief pressure set by the assembly through the selective adjustment of one member in the assembly with respect to another member in the assembly.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: February 23, 2010
    Assignee: Smith International, Inc.
    Inventors: Zhou Yong, George B. Witman, IV, Carlos Torres
  • One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices
    Patent number: 6814162
    Abstract: A drill bit, comprising a bit body, a sensor disposed in the bit body, a single journal removably mounted to the bit body, and a roller cone rotatably mounted to the single journal.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: November 9, 2004
    Assignee: Smith International, Inc.
    Inventors: David P. Moran, George B. Witman, IV
  • Single-cone rock bit having cutting structure adapted to improve hole cleaning, and to reduce tracking and bit balling
    Patent number: 6719073
    Abstract: A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In one aspect, the inserts have an extension length of at least 0.6 inches. A roller cone drill bit is disclosed, including a bit body, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the journal. The roller cone has a plurality of inserts disposed thereon. In another aspect, the inserts are arranged such that at most about 20 percent of the inserts are crossed substantially at centerlines thereof by any single plane which contains the axis of the cone axis 10 and which crosses at least two of the inserts.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: April 13, 2004
    Assignee: Smith International, Inc.
    Inventors: Ying Xiang, George B. Witman, IV, Michael A. Siracki