Patents by Inventor Edmond C. Clarke

Edmond C. Clarke 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: 4142332
    Abstract: A drill grinding fixture for drills of between about 1/16 to 1/2 inch diameter, including an inclined trough member for receiving the drill to project from the forward end of the trough member toward the vertical face of a grinding wheel. The trough member is rotatable on a vertical pin of which the axis is offset 1/8 inch to the left of the bottom of the V-shaped trough, the pin being located between about 1/2 and 3/4 of an inch in front of the wheel face. The trough member is provided with a recess to receive a drill holder which is rockable about the axis of the drill to present one and the other cutting lip of the drill for grinding.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: March 6, 1979
    Inventor: Edmond C. Clarke