Patents by Inventor Hisamitsu Shibakawa

Hisamitsu Shibakawa 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).

  • Patent number: 5361707
    Abstract: A multiple feeder system of feeder sections for feeding electricity to ground coils of a superconductive magnetically levitated railway in which a train is equipped with a superconducting magnet is provided with unit feeder sections each having a length shorter than the length of the train; and a multiple feeder line for multiplexing the unit feeder sections so as to drive the train.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: November 8, 1994
    Assignee: Railway Technical Research Institute
    Inventors: Junji Fujie, Hisamitsu Shibakawa
  • Patent number: 5293824
    Abstract: Ground coils for a magnetically levitated railway include non-flux coils with an upper coil having a main-winding portion and an intermediate terminal forming a shunt-winding portion of the main-winding portion. A lower coil having a main-winding portion and an intermediate terminal forming a shunt-winding portion of the main-winding portion. The upper coil and the lower coils are arranged one above the other and are null-flux connected at null-flux connection points. A first lead terminal is connected to one null-flux connection point and a second lead terminal is connected to the intermediate terminal of the upper coil and the intermediate terminal of the lower coil for connecting to a power source and/or for interconnecting coils on left and right sides to provide guidance forces to the superconducting coils on the vehicle.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: March 15, 1994
    Assignee: Railway Technical Research Institute
    Inventors: Junji Fujie, Hisamitsu Shibakawa