Patents by Inventor Eiichi Tojo

Eiichi Tojo 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).

  • Throttle valve control device
    Patent number: 5996554
    Abstract: A throttle valve control device is composed of a stator core with a solenoid and a rotor carrying a throttle valve. The rotor has a pair of poles which is composed of one or a plurality of rare-earth-metal permanent magnets magnetized in the radial thickness direction. The stator core has an inner periphery sorounding the rotor, and the inner periphery is smooth with no slot so that uniform distribution of magnetic flux can be formed in the inner periphery, thereby reducing the detent torque.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: December 7, 1999
    Assignee: Denso Corporation
    Inventors: Eiichi Tojo, Hideki Kato, Hazime Akado, Hiromitsu Ohnishi, Yuichiro Miura, Keiichi Okazaki