Patents by Inventor Johnnie W. Clark

Johnnie W. Clark 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).

  • Convex-concave hobs
    Patent number: 5626443
    Abstract: A pair of complimentary gear cutting hobs including a convex hob having a plurality of hob teeth, with each hob tooth defining on opposite sides thereof cutting edges having a convex shape. The convex shape is defined by an arc with a center of radius which lies in the plane of the bottoms of the teeth. The complimentary hob is a concave hob having a plurality of hob teeth, with each hob tooth defining, on opposite sides thereof, cutting edges having a concave shape which is defined by an arc with a center of radius which lies in the plane of the tops of the teeth.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: May 6, 1997
    Inventor: Johnnie W. Clark