Patents by Inventor Yoshiro Fukazawa

Yoshiro Fukazawa 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).

  • Track displacement detecting and measuring system
    Patent number: 4173073
    Abstract: A track displacement detecting and measuring system in which track displacement data are obtained as usual for a unit chord length of the track according to the conventional three-point measuring method by sensors mounted on three predetermined parts of a track inspection car, and such measured data are processed by an arithmetic or processing device of relatively simple structure to detect the amount of track displacement occurring over a track distance which is two or four times the unit chord length. In the system, an improved gyro device free from the adverse effect of rolling of the car is employed so as to permit precise detection of vertical track displacement irrespective of the track distance.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: November 6, 1979
    Assignees: Hitachi, Ltd., Japanese National Railways, Hitachi Electronics Engineering Co., Ltd.
    Inventors: Yoshiro Fukazawa, Takahiko Mochinaga, Morimasa Shirozume, Satoru Kishimoto, Makoto Ito, Fukuo Iwaya