Patents by Inventor Koumei Miyairi

Koumei Miyairi 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).

  • Power supply system for a linear motor type transportation system
    Patent number: 5125347
    Abstract: A power supply system for a linear motor type transportation system includes a series of driving coils disposed along a railroad track for producing a moving magnetic field to drive a train, a plurality of feeding blocks disposed along the railroad track for supplying electric power to the series of driving coils, a plurality of power converters each connected to the corresponding feeding blocks to supply electric power to each corresponding feeding section composed of the feeding blocks, and a plurality of block switches connected between neighboring two feeding blocks of the feeding blocks.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: June 30, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Youji Takahashi, Toyoharu Uchiyama, Kiyoshi Nakamura, Akira Kimura, Shigeyoshi Koike, Koumei Miyairi