Patents by Inventor Yukio Kamura

Yukio Kamura 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).

  • Gas-insulated switchgear apparatus
    Patent number: 4658329
    Abstract: A gas-insulated switchgear apparatus including a three-phase circuit breaker, a three-phase disconnecting switch and a cable head, with the disconnecting switch and the cable head being accommodated in a cable head housing. To minimize the size of the disconnecting switch, movable insulators, connected to movable conductors, and stationary insulators, supporting connecting conductors, are arranged so that the movable and stationary insulators form triangles disposed substantially in the same plane with the respective triangles being inverted in relation to each other.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: April 14, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Yukio Kamura, Seizo Nakano, Tohru Tsubaki, Satoshi Miwada, Naoki Amano