Patents by Inventor Robert J. Balkenbush

Robert J. Balkenbush 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).

  • Replaceable nozzles for insertion into a drilling bit formed by powder metallurgical techniques and a method for manufacturing the same
    Patent number: 4567954
    Abstract: Replaceable nozzles may be provided in a tungsten carbide drill bit manufactured by powder metallurgical infiltration techniques wherein at least one nozzle is threaded into a corresponding molded threaded bore in the bit. Despite the practical nonmachinability and brittleness of the tungsten carbide material, secure threaded insertion can be achieved if a squared thread design is used, and if the mold plug for forming the threaded bore is oversized to take into account the average variation in shrinkage in a bit formed by powder metallurgical infiltration techniques.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: February 4, 1986
    Assignee: Norton Christensen, Inc.
    Inventors: Robert W. Voight, III, Jerry L. Robin, Lorenzo G. Lovato, Robert J. Balkenbush, Joseph D. McDermaid