Patents by Inventor Robert B. Crawford

Robert B. Crawford 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).

  • Patent number: 4971602
    Abstract: A method for form grinding gears is disclosed using diamond or cubic boron nitride as the abrasive including form grinding a female wheel with a master gear form grinding wheel to produce a desired gear tooth profile on the circumference of the female wheel. The female wheel is then made oversize by bonding diamond or cubic boron nitride abrasive to its grinding surface. A male wheel is then form ground with the female wheel to produce a undersized tooth profile on the male wheel. After the male wheel is plated with diamond or cubic boron nitride abrasive it is at the desired tooth profile and can then be used to form grind gears having the desired tooth profile.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: November 20, 1990
    Inventor: Robert B. Crawford