Patents by Inventor Shuuichi Umezawa

Shuuichi Umezawa 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).

  • Device for calculating a torque of a rotating member
    Patent number: 6460422
    Abstract: A torque measuring device including a light irradiation element for irradiating a light, and a control unit operatively connected to the irradiation element so as to branch the light into a plurality of lights as beams and control a beam diameter of the respective lights so as to irradiate the lights on a surface of a member to be measured. The torque measuring device further includes a plurality of reflectors disposed on the surface of the member to be measured so as to change reflection state of the respective lights, a plurality of detectors for detecting the changes of intensities of the respective reflected lights and generating signals thereof, and a signal processor for processing the generated signals and operating a rotation period on the basis of the generated signals thereby to calculate a torque of the member to be measured.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: October 8, 2002
    Assignees: Kabushiki Kaisha Toshiba, The Tokyo Electric Power Co., Inc.
    Inventors: Hidehiko Kuroda, Shigeru Kanemoto, Michio Sato, Takuhisa Kondo, Makoto Ochiai, Hitoshi Sakakida, Tatsuo Yamashita, Kiyoto Oyagi, Shuuichi Umezawa, Kazuo Saito, Hajime Obikawa