Patents by Inventor Eisuke Hoshina

Eisuke Hoshina 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).

  • Publication number: 20090085423
    Abstract: A core comprises a plurality of core split members having yoke portions and tooth portions and arranged in such a circumferential shape that the yoke portions contact with each other while the tooth portions being directed inward. The core further comprises a ring contacting with the yoke portions, and stoppers mounted on the outer face sides of the yoke portions for fixing the ring on the yoke portions. The yoke portions and the ring are formed in corrugated shape to mesh with each other, and the stoppers are formed with projections that engage with the inner side of the ring. This structure provides both the rotating electrical machine core having the core split members arranged in the circumferential shape and fastened to each other while preventing occurrence of a stress and a positional displacement between the core split members, and a rotating electrical machine.
    Type: Application
    Filed: January 15, 2007
    Publication date: April 2, 2009
    Inventors: Eisuke Hoshina, Toshiya Yamaguchi, Yasuhiro Endo, Kazutaka Tatematsu, Yutaka Komatsu
  • Publication number: 20080001494
    Abstract: In a stator core composed of a powder compacted magnetic body, a yoke part comprises a protrusion protruding from an axial end face of a tooth. The tooth has an axial length gradually decreases towards an outside along the radial direction of the stator core, and a circumferential length which gradually increases towards an outside along the radial direction of the stator core. In one of the cross sections of stator core perpendicular to a radial direction, the height difference between axial end faces of the yoke part and the tooth is substantially equal to an axial length of a coil end part. Further, a cross-sectional area of the tooth perpendicular to the radial direction is substantially maintained constant along the radial direction, and the cross-sectional area is secured at a junction between the tooth and the yoke part, while half of the cross-sectional area is secured in a circumferential cross section of the yoke part.
    Type: Application
    Filed: October 28, 2005
    Publication date: January 3, 2008
    Inventors: Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu, Kenji Harada, Toshiya Yamaguchi, Eisuke Hoshina