Patents by Inventor Thomas W. Cooper

Thomas W. Cooper 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).

  • Patent number: 4333691
    Abstract: A rolling cone cutter earth boring bit is provided having a pair of radial facing thrust bearing surfaces bounding the pilot pin of the journal and the pilot pin cavity on the cone. The thrust bearing surface of the cone defines a plurality of slots open to, and angled forwardly from, the pin cavity, and terminating within the annular bearing area. The bearing surfaces are, upon assembly, lubricated with a "smear grease" which, under drilling operation works its way to the radially outermost area of the bearing surfaces leaving the bearing area adjacent the pilot pin generally depleted of lubricant. The slots, being closed on the outer end and having radially inwardly impelling force, scrape the outwardly migrated lubricant from the journal pin thrust surface and direct it back toward the pilot pin area for redeposition to replenish lubricant in the radially inner area of the bearing.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: June 8, 1982
    Assignee: Dresser Industries, Inc.
    Inventor: Thomas W. Cooper
  • Patent number: 4179003
    Abstract: A seal acts as a barrier to the drilling fluid, pulverized cuttings and other materials in a borehole preventing the materials from entering the bearing area of a rolling cone cutter earth boring bit and retains lubricant inside the bearing area. A rolling cone cutter is rotatably mounted on a cantilevered bearing pin extending from the bit body. A "Z" seal is positioned between the cutter and bearing pin. An outer rigid seal ring is positioned around the bearing pin. The outer rigid seal ring is split to allow radial expansion and contraction. An inner rigid smaller diameter seal ring is positioned around the bearing pin. The inner rigid seal ring is also split to allow radial expansion and contraction. An elastomer ring is located between the inner and outer rigid rings and affixed to the rigid rings.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: December 18, 1979
    Assignee: Dresser Industries, Inc.
    Inventors: Thomas W. Cooper, Ernest E. Taylor
  • Patent number: D283207
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: April 1, 1986
    Assignee: True Temper Railway Appliances, Inc.
    Inventor: Thomas W. Cooper