Patents by Inventor Wataru Bitoh

Wataru Bitoh 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).

  • Heat resistant and explosion-proof type permanent magnetic synchronous motor
    Patent number: 5233248
    Abstract: A heat resistant and explosion-proof permanent magnetic synchronous motor having a stator which includes an armature iron core made by piling up steel plates with surface covered with a mineral insulation material and disposed on an inner peripheral surface of a pressure case, an armature coil made by winding a wire covered with a mineral insulation material around a slot of the armature iron core, a can hermetically sealing the armature iron core, a back-up sleeve supporting the can at a portion where the armature iron core is not provided, and a slot piece of a mineral insulation material supporting the can at an opening portion of the slot.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: August 3, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuhiro Kawamura, Wataru Bitoh, Akira Yamada, Syo Imayoshi