Patents by Inventor Tetsuzo Sakamoto

Tetsuzo Sakamoto 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).

  • Bearing wear detector for AC rotary electric instrument
    Patent number: 4199718
    Abstract: A bearing wear detector for an AC rotary electric instrument such as an electric motor or a generator in which more than three detecting coils are mounted around a core of the electric instrument having poles of three or not three multiples at a relative space angle and the detecting coils are connected in series to obtain a resultant voltage.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: April 22, 1980
    Assignee: Nikkiso Co., Ltd.
    Inventors: Hiroshi Ikeda, Osamu Ishimaru, Teruyoshi Nakatake, Tetsuzo Sakamoto