Patents by Inventor Yoko Yamashina

Yoko Yamashina 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 electric machine and cooling method thereof
    Patent number: 6936939
    Abstract: A rotating electric machine having a plurality of ventilating passages formed between a stator frame and a stator iron core and coolers which cool a coolant being provided in the plurality of the ventilating passages. A ventilating circuit in which at least a portion of the coolant which is cooled by one of the coolers is further cooled by another of the coolers, and is allowed to flow to a central portion in an axial direction of the stator iron core in a direction from an outer peripheral side to an inner peripheral side of the stator iron core at least via one ventilating passage of the plurality of ventilating passage which communicates with the central portion in the axial direction of the stator iron core.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: August 30, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Kazumasa Ide, Kenichi Hattori, Akiyoshi Komura, Yoko Yamashina, Tadashi Sonobe, Akitomi Semba, Junji Sato, Ryoichi Shiobara, Mitsunori Yamashina
  • Rotating electric machine and cooling method thereof
    Publication number: 20040189110
    Abstract: A rotating electric machine having a plurality of ventilating passages formed between a stator frame and a stator iron core and coolers which cool a coolant being provided in the plurality of the ventilating passages. A ventilating circuit in which at least a portion of the coolant which is cooled by one of the coolers is further cooled by another of the coolers, and is allowed to flow to a central portion in an axial direction of the stator iron core in a direction from an outer peripheral side to an inner peripheral side of the stator iron core at least via one ventilating passage of the plurality of ventilating passage which communicates with the central portion in the axial direction of the stator iron core.
    Type: Application
    Filed: April 9, 2004
    Publication date: September 30, 2004
    Inventors: Kazumasa Ide, Kenichi Hattori, Akiyoshi Komura, Mitsunori Yamashina, Tadashi Sonobe, Akitomi Semba, Junji Sato, Ryoichi Shiobara, Yoko Yamashina