Patents by Inventor Wataru Bitou

Wataru Bitou 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).

  • Stator coil for rotary electric machine
    Patent number: 6130496
    Abstract: A stator coil for a rotating electrical machine having a ground wall insulation of a stator coil impregnated with a resin, maintaining a releasing characteristic between the ground wall insulation and a slot of a stator core, preventing surface corona and exhibiting excellent characteristics for a long time. The stator coil of the rotating electrical machine has a conductor covered with an insulating layer and a surface-corona preventive layer, the stator coil being accommodated in the slot of a stator core and, together with the stator core, impregnated with a thermosetting resin so that the stator coil is integrated with the stator core. The surface-corona preventive layer has a wound semiconductive tape and a composite tape including a fluorine-containing non-bonding material layer on a second semiconductive tape.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: October 10, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideki Takigawa, Wataru Bitou, Makoto Tsukiji, Hiroki Shiota, Shiro Takada, Nobuo Urakawa