Patents Assigned to Yamawa Manufacturing Limited
  • Patent number: 7950880
    Abstract: A cutting tool that includes an elongate body that has a forward end and a rearward end. The elongate body has a fluted portion that beginning near and extends in a rearward direction from the forward end. The fluted portion has a flute that defines a cutting edge. The flute presents a concave cutting face wherein the concave cutting face is defined by a first radius. The flute further presents a concave core surface adjacent to the concave cutting face wherein the concave core surface is defined by a second radius. The flute presents a convex heel surface adjacent to the concave core surface wherein the convex heel surface is defined by a fourth radius.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: May 31, 2011
    Assignees: Kennametal Inc., Yamawa Manufacturing Limited
    Inventors: Willard E. Henderer, Stephen M. George, Steven R. Burns, Sadayuki Akaki