Patents by Inventor Toyoharu Uchiyama

Toyoharu Uchiyama 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
  • Power supply apparatus for linear motor
    Patent number: 4721892
    Abstract: Disclosed is a power supply apparatus for a linear motor transportation system having a number of discrete linear motor units serially arranged along a track to generate a moving magnetic field for driving vehicle.
    Type: Grant
    Filed: February 5, 1987
    Date of Patent: January 26, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoshi Nakamura, Masayoshi Isaka, Toyoharu Uchiyama
  • Power supply apparatus for linear motor
    Patent number: 4689530
    Abstract: Disclosed is a power supply apparatus for a linear motor transportation system having a number of discrete linear motor units serially arranged along a track to generate a moving magnetic field for driving vehicle.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: August 25, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoshi Nakamura, Masayoshi Isaka, Toyoharu Uchiyama