Patents by Inventor Nathan J. Harshman

Nathan J. Harshman 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).

  • Access notches for indexing inserts in a groove mill
    Patent number: 4674923
    Abstract: A tool for use in a groove mill to simultaneously form spaced grooves in the interior surface of a bore with the tool including a shank and a pair of heads mounted thereon in spaced relation and in a detachable, non-rotative manner. Each head includes a plurality of insert pockets and inserts secured therein by screw threaded retainers and notches in one head aligned with the screw headed retainers for the inserts in the opposite head to enable indexing of the inserts without disassembly of the heads.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: June 23, 1987
    Assignee: Ratemaker Tools, Inc.
    Inventors: Francis J. Ogilvie, Nathan J. Harshman