Patents by Inventor Moritaka Syouji

Moritaka Syouji 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).

  • Ceramic resistor, production method thereof, neutral grounding resistor and circuit breaker
    Patent number: 5764129
    Abstract: A ceramic resistor includes zinc oxide as a main component, and as essential components, aluminum oxide 3.0-40 mol %, magnesium oxide 2.0-40 mol %, silicon oxide 0.1-10 mol %, and at least one kind of compound 0.005-0.5 mol %, selected from a group consisting of calcium oxide, strontium oxide and barium oxide, and has a positive temperature coefficient of resistance. A neutral grounding resistor and a gas circuit breaker, each using the above-mentioned ceramic resistors, are disclosed.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: June 9, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Moritaka Syouji, Tadashi Kitami, Seiichi Yamada, Ken Takahashi, Shingo Shirakawa, Takeo Yamazaki, Shigeru Tanaka, Shigehisa Motowaki
  • Voltage non-linear resistor and fabricating method thereof
    Patent number: 5610570
    Abstract: A non-linear resistor having a high impulse withstanding ability is obtained by directly applying a crystallized glass to the side surface of a sintered body of a ZnO element, and then bake-attaching the crystallized glass to the side surface of the ZnO element by heat treatment. Since the impulse withstanding ability is improved by applying the crystallized glass as the side surface high-resistivity layer of the voltage non-linear resistor, the performance and reliability of an arrester including the resistor is improved.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: March 11, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Seiich Yamada, Shigeru Tanaka, Moritaka Syouji, Shigehisa Motowaki, Ken Takahashi, Shingo Shirakawa, Kunihiro Maeda