Patents by Inventor Yuta MATSUNAMI

Yuta MATSUNAMI 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).

  • Rotating electrical machine and producing method of rotating electrical machine
    Patent number: 10855123
    Abstract: A rotating electrical machine includes a plurality of core pieces forming a stator core. Each of the core pieces includes contact surfaces on one side end and another side end in a peripheral direction, a tapered protrusion on the contact surface of the one side end, the protrusion including first inclined surfaces outside and inside, and a recess on the contact surface of the other side end, the recess including second inclined surfaces contacting the first inclined surfaces outside and inside to receive the protrusion of adjacent core piece. A cross-sectional shape of the protrusion is a shape such that, inside a circle centered on a first end portion with a distance being a radius between a second end portion located on an opposite side of the first end portion and the first end portion, at least a part of the first inclined surfaces contact the second inclined surfaces.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: December 1, 2020
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo Suzuki, Motomichi Ohto, Kenichi Hirata, Hiroki Takamura, Yosuke Shirozu, Yuta Matsunami
  • ROTATING ELECTRICAL MACHINE AND PRODUCING METHOD OF ROTATING ELECTRICAL MACHINE
    Publication number: 20190013706
    Abstract: A rotating electrical machine includes a plurality of core pieces forming a stator core. Each of the core pieces includes contact surfaces on one side end and another side end in a peripheral direction, a tapered protrusion on the contact surface of the one side end, the protrusion including first inclined surfaces outside and inside, and a recess on the contact surface of the other side end, the recess including second inclined surfaces contacting the first inclined surfaces outside and inside to receive the protrusion of adjacent core piece. A cross-sectional shape of the protrusion is a shape such that, inside a circle centered on a first end portion with a distance being a radius between a second end portion located on an opposite side of the first end portion and the first end portion, at least a part of the first inclined surfaces contact the second inclined surfaces.
    Type: Application
    Filed: September 14, 2018
    Publication date: January 10, 2019
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takeo SUZUKI, Motomichi OHTO, Kenichi HIRATA, Hiroki TAKAMURA, Yosuke SHIROZU, Yuta MATSUNAMI