Patents by Inventor Christopher J. Rohmer

Christopher J. Rohmer 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).

  • Earth-boring bit having improved cutting structure
    Patent number: 5697462
    Abstract: A bit body has at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements arranged in generally circumferential rows on the cutter, the rows including a heel row. The cutting elements in the heel row include at least one chisel-shaped cutting element having a crest oriented transversely to the axis of rotation of the cutter. The remainder of the cutting elements in the heel row have a configuration different from the chisel-shaped elements. All of the cutting elements have approximately the same projection from the surface of the cutter.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: December 16, 1997
    Assignee: Baker Hughes Inc.
    Inventors: Robert E. Grimes, Rudolf Carl Otto Pessier, Christopher J. Rohmer