Patents by Inventor Dai Ikeda

Dai Ikeda 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).

  • Rotor and rotating electric machine equipped with the rotor
    Patent number: 9239082
    Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: January 19, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomoaki Kaimori, Kenichi Nakayama, Yasuyuki Saito, Dai Ikeda
  • ROTOR AND ROTATING ELECTRIC MACHINE EQUIPPED WITH THE ROTOR
    Publication number: 20130043761
    Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a
    Type: Application
    Filed: August 23, 2010
    Publication date: February 21, 2013
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD
    Inventors: Tomoaki Kaimori, Kenichi Nakayama, Yasuyuki Saito, Dai Ikeda