Patents by Inventor Kazufumi Yamanaka

Kazufumi Yamanaka 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).

  • Cutting tool of polycrystalline hard sintered material
    Patent number: 6612786
    Abstract: A cutting edge of a cutting tool is made of a polycrystalline hard sintered material containing at lest 20 vol % of CBN. A radius of curvature in cross section of a ridge of the cutting edge is between 5 &mgr;m and 30 &mgr;m. A flank and a rake face or negative land of the cutting tool are smoothly continued from the radius of curvature in cross section. The surface roughness of the ridge of the cutting edge is from 0.1 &mgr;m to 1.0 &mgr;m as an average roughness (Rz) of a ten point system.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: September 2, 2003
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuyuki Kanada, Kazufumi Yamanaka
  • End mill
    Patent number: D553169
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: October 16, 2007
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Naoki Sakata, Kazufumi Yamanaka, Keiji Kinoshita
  • End mill
    Patent number: D555683
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: November 20, 2007
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Naoki Sakata, Kazufumi Yamanaka, Keiji Kinoshita
  • End mill
    Patent number: D556225
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: November 27, 2007
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Naoki Sakata, Kazufumi Yamanaka, Keiji Kinoshita