Patents by Inventor George T. Blackwell

George T. Blackwell 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: 4770219
    Abstract: Adzer bit assemblies (18) are of noncircular outer surface configuration and have a noncircular surface seated against a face (15) of similar noncircular shape to hold the assembly against rotation. When becoming worn, the adzing bit assembly can be loosened from the adzing head (99), and rotated to present a fresh cutting surface.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: September 13, 1988
    Inventor: George T. Blackwell, Jr.
  • Patent number: 4506715
    Abstract: The adzing bit assembly includes a circular cutting bit with a circular edge formed by the merging of its flat face and its peripheral surface at an acute angle. A cutting bit shield abuts and covers the face of the cutting bit and extends to a diameter substantially equal to the diameter of the cutting edge, so as to shield the face and the cutting edge of the cutting bit. The cutting bit is fabricated from harder material than the cutting bit shield, so that the cutting bit shield wears away during use and the circular cutting edge of the cutting bit is progressively exposed.
    Type: Grant
    Filed: May 11, 1983
    Date of Patent: March 26, 1985
    Inventor: George T. Blackwell