Patents by Inventor Morio Machida

Morio Machida 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).

  • Transformer zero-phase current transformer
    Patent number: 5691686
    Abstract: A control unit accommodates various equipment, such as a circuit breaker, an electromagnetic switch, a zero-phase current transformer, and an operating transformer. The zero-phase current transformer is generally triangular-shaped to fit more compactly within the control unit. More specifically, the zero-phase current transformer comprises an annular core having a shape which is substantially triangular, wherein the annular core encloses an aperture region having a shape which is also substantially triangular. A primary conductor is disposed within the aperture region, and a secondary conductor is wound on the annular core.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: November 25, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Ishikawa, Osamu Hasegawa, Yasuhiko Ookubo, Morio Machida