Patents by Inventor Bruce H. Walker

Bruce H. Walker 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).

  • Tamper resistant governor control rod cover
    Patent number: 6085715
    Abstract: A cover is provided which partially covers a governor control rod of a small engine. The cover mounts to a portion of an engine housing. The cover prevents a user from tampering with the governor control rod on a small engine.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: July 11, 2000
    Inventor: Bruce H. Walker
  • Rotary bit with jet nozzles
    Patent number: 4341273
    Abstract: A jet rotary drill bit confirming a first strainer element allowing the passage of mud carrying small-sized particles, but preventing relatively coarse particles from passing to the jet nozzles. The first strainer element is self-cleaning and the relatively coarse particles are passed on to a second strainer on which they remain trapped.
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: July 27, 1982
    Assignee: Shell Oil Company
    Inventors: Bruce H. Walker, Robijn Feenstra
  • Earth-boring drill bits
    Patent number: 4244432
    Abstract: The invention relates to the design of earth bore-hole drill bits employing shaped preform cutters containing hard abrasive materials, such as diamonds, the cutters being mounted in companion preformed sockets in a hard metal bit matrix.
    Type: Grant
    Filed: June 8, 1978
    Date of Patent: January 13, 1981
    Assignee: Christensen, Inc.
    Inventors: David S. Rowley, Bruce H. Walker, Coy M. Fielder
  • Earth-boring drill bits
    Patent number: 4073354
    Abstract: The invention relates to the design of earth boring bits employing shaped preform cutters containing hard abrasive materials such as diamonds.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: February 14, 1978
    Assignee: Christensen, Inc.
    Inventors: David S. Rowley, Bruce H. Walker, Coy M. Fielder, Heino J. Rohde