Patents by Inventor Mutsumasa NAMBA

Mutsumasa NAMBA 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).

  • Rotary tool and method for manufacturing machined product
    Patent number: 10821526
    Abstract: A rotary tool may include a body, the body may include a cutting edge and a first groove. The first groove may include a first region having a first helix angle, a second region having a second helix angle, a third region having a third helix angle, a fourth region having a fourth helix angle, and a fifth region having a fifth helix angle. The fourth helix angle and the fifth helix angle may each decrease from a side of a first end toward a second end. A decreasing range of a value of the fourth helix angle of the fourth region may be less than a decreasing range of a value of the fifth helix angle of the fifth region. A length of the fourth region may be greater than a length of the fifth region.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: November 3, 2020
    Assignee: KYOCERA CORPORATION
    Inventors: Hirokazu Hatano, Mutsumasa Namba
  • ROTARY TOOL AND METHOD FOR MANUFACTURING MACHINED PRODUCT
    Publication number: 20190270144
    Abstract: A rotary tool may include a body, the body may include a cutting edge and a first groove. The first groove may include a first region having a first helix angle, a second region having a second helix angle, a third region having a third helix angle, a fourth region having a fourth helix angle, and a fifth region having a fifth helix angle. The fourth helix angle and the fifth helix angle may each decrease from a side of a first end toward a second end. A decreasing range of a value of the fourth helix angle of the fourth region may be less than a decreasing range of a value of the fifth helix angle of the fifth region. A length of the fourth region may be greater than a length of the fifth region.
    Type: Application
    Filed: November 13, 2017
    Publication date: September 5, 2019
    Inventors: Hirokazu HATANO, Mutsumasa NAMBA