Patents by Inventor Naoshi Sakata

Naoshi Sakata 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 using electrical steel sheet with low iron loss, rotor manufacturing method, laser peening method, and laser peening apparatus
    Publication number: 20070108169
    Abstract: A laser peening apparatus for manufacturing a rotor using an electrical steel sheet with low iron loss for enabling high speed rotation of a motor. The laser peening apparatus includes a laser irradiating device for irradiating with a laser through a liquid the rotor made of an electrical steel sheet with low iron loss, and a drive device for moving the rotor relative to an irradiation spot of the laser so that the laser irradiates along a bridge side on an inner circumference of a magnet insertion window of the rotor.
    Type: Application
    Filed: September 21, 2004
    Publication date: May 17, 2007
    Inventors: Munekatsu Shimada, Hideaki Ono, Takae Ono, Tetsurou Tayu, Makoto Kano, Yu Owada, Naoshi Sakata, Kimihiro Shibata, Toshimitsu Matsuoka, Nobuhiko Tanaka, Yukio Watanabe, Yuji Sano, Hironobu Kimura
  • Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method
    Patent number: 6891297
    Abstract: An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side thereof for the opening portion and having a higher hardness than a remaining area of the electrical-steel-sheet formed body. The electrical-steel-sheet formed body can be used as the rotor of the built-in permanent magnet type rotary electric machine, and the built-in permanent magnet type rotary electric machine can be obtained.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: May 10, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Munekatsu Shimada, Hideaki Ono, Tetsurou Tayu, Makoto Kano, Yu Owada, Naoshi Sakata, Mitsuo Uchiyama, Toshimitsu Matsuoka, Kimihiro Shibata, Shinichiro Kitada
  • Stator for motor
    Patent number: 6870292
    Abstract: A stator for a motor is a segmented type including a plurality of stator segments. Each stator segment includes a core segment forming a stator core, a stator winding including a first winding wound in one direction on the core segment, and a second winding wound in the opposite direction on the core segment, and an insulating member interposed between the core segment and the stator winding. A connecting member is formed integrally in the insulating member, and arranged to electrically connect inner ends of the first and second windings to form a single continuous winding.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: March 22, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yu Owada, Mitsuo Uchiyama, Naoshi Sakata
  • Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method
    Publication number: 20030201685
    Abstract: An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side thereof for the opening portion and having a higher hardness than a remaining area of the electrical-steel-sheet formed body. The electrical-steel-sheet formed body can be used as the rotor of the built-in permanent magnet type rotary electric machine, and the built-in permanent magnet type rotary electric machine can be obtained.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 30, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Munekatsu Shimada, Hideaki Ono, Tetsurou Tayu, Makoto Kano, Yu Owada, Naoshi Sakata, Mitsuo Uchiyama, Toshimitsu Matsuoka, Kimihiro Shibata, Shinichiro Kitada
  • Stator for motor
    Publication number: 20030098630
    Abstract: A stator for a motor is a segmented type including a plurality of stator segments. Each stator segment includes a core segment forming a stator core, a stator winding including a first winding wound in one direction on the core segment, and a second winding wound in the opposite direction on the core segment, and an insulating member interposed between the core segment and the stator winding. A connecting member is formed integrally in the insulating member, and arranged to electrically connect inner ends of the first and second windings to form a single continuous winding.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 29, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yu Owada, Mitsuo Uchiyama, Naoshi Sakata