Patents by Inventor Syozi Kasai

Syozi Kasai 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).

  • Control system for maintaining traction of rolling stock
    Patent number: 4701682
    Abstract: From the peripheral velocity v.sub.M of a driving wheel and vehicle velocity v, the changing rate .DELTA.v.sub.s /.DELTA.t of the relative velocity v.sub.s therebetween with respect to time is obtained. The changing rate .DELTA.f/.DELTA.t of the traction force f produced in the driving wheel at that time is obtained from a detected armature current of a motor driving the driving wheel. A driving torque produced by the motor is so controlled as to be decreased when polarities of the changing rate in the relative velocity and that in the traction force are different from each other.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: October 20, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuji Hirotsu, Hisakatsu Kiwaki, Kiyoshi Nakamura, Hiroshi Narita, Syozi Kasai, Akira Kimura, Yoshio Tsutsui