Patents by Inventor Keisuke Shimagami

Keisuke Shimagami 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).

  • Voltage non-linear resistor unit and arrester unit
    Patent number: 6344789
    Abstract: A voltage non-linear resistor unit is composed of at least one of voltage non-linear resistors which is composed of a columnar sintered body formed by molding and sintering a raw material, the sintered body having both end surfaces having a surface roughness in term of arithmetic average surface roughness Ra of 1 to 2 &mgr;m and being formed with an electrode film layer, a terminal metal fitting formed in a predetermined shape and attached to the voltage non-linear resistor, and a soldering material arranged between the voltage non-linear resistors and between joint surfaces of the voltage non-linear resistor and the terminal metal fitting, the joint surfaces being joined by heating the soldering material and applying a load vertically to the joint surfaces while giving a rotation motion thereto. Such voltage non-linear resistor is effectively assembled into an arrester.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: February 5, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Udagawa, Masahiro Kan, Yoshihiro Ishizaki, Nobuyuki Shimizu, Hironori Suzuki, Hiroyoshi Narita, Yoshihiko Hirano, Hideyasu Andoh, Yasuhiko Taniguchi, Masahiro Hanai, Masahiko Ebina, Keisuke Shimagami, Yoshiyasu Itoh, Takahiko Shindo