Patents by Inventor Ralph D. Shirley

Ralph D. Shirley 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).

  • Three dimensional mill and milling inserts
    Patent number: 5944456
    Abstract: A three dimensional mill capable of plunging, ramping, circle interpolating and other milling processes while providing a finished surface not in need of finish grinding. The milling cutter includes cutting inserts of a modified design including flats separating rounded corners of a two radius design. Each insert also includes a rail that is secured to the milling cutter along a longitudinal surface that is radial to the axis of the milling cutter at any cross sectional plane.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: August 31, 1999
    Assignee: Kennametal Inc.
    Inventors: Ralph D. Shirley, Gary D. Baldwin, Kay E. Kucharik, William C. Magill, Alfred R. Augustine, Robert A. Acero, William R. Shaffer