Patents Examined by E. Robert Kazenske
  • Sealed bearing rotary rock bit assembly
    Patent number: 4441244
    Abstract: A water detecting system for detecting water in the bearings and lubricant reservoir system of a sealed bearing rotary rock bit permits detection and removal of water to decrease premature bearing failure caused by the presence of water on the bearing surface.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: April 10, 1984
    Assignee: Dresser Industries, Inc.
    Inventor: George A. Cason, Jr.