Patents by Inventor Kenneth Johns

Kenneth Johns 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).

  • Mosaic diamond drag bit cutter having a nonuniform wear pattern
    Patent number: 5238074
    Abstract: A cutter for a rotating drag bit which has a cutting face formed from a plurality of polycrystalline diamond compact (PCD) elements. The elements can be of varying thickness and/or varying hardness to provide a cutting edge having a nonuniform wear pattern. Also provided is a cutter which includes two layers of PCD elements. The PCD elements can be of varying thickness and/or hardness to provide a cutter which presents a cutting edge having a wear ratio which varies with cutter wear. Also provided is an impact cutter having a cutting surface formed from one or more layers of PCD elements.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: August 24, 1993
    Assignee: Baker Hughes Incorporated
    Inventors: Gordon A. Tibbitts, Kenneth Johns