Patents by Inventor Dolph R. Crawley

Dolph R. Crawley 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).

  • Mounting system for raise and shaft cutters
    Patent number: 5487435
    Abstract: A bit body with a mount having a leg that extends along the rotational axis of the bit, a journal with a wedge shaped end secured to a wedge shape opening in the leg. A wedge on the journal has a fastener hole to register coaxially with a fastener hole in the leg and receives a fastener to secure the wedge on the journal in the wedge shape in the leg. One side of the wedge shape is generally perpendicular to the bit axis, and the adjacent side of the wedge forms an acute angle with said perpendicular side. The acute angle is in a range of about thirty to sixty degrees, ideally about 35 degrees.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: January 30, 1996
    Assignee: Baker Hughes Incorporated
    Inventors: Dolph R. Crawley, Steven R. Brooke