Patents by Inventor Tetsuo Kanazawa

Tetsuo Kanazawa 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 transmission line having reserve circuit for recovering insulting gas
    Patent number: 5818004
    Abstract: In a gas-insulated transmission line for transmitting electric power between the substations, a bus change-over disconnecting switch for connection to a reserve circuit is provided at a portion where the gas-insulated transmission line is connected to a gas-insulated switchgear in order to improve reliability, and a first circuit and a second circuit are connected to the reserve circuit by using the change-over disconnecting switch. Therefore, even if grounding fault occurs on the two circuits at worst, transmission of electric power is reliably maintained without causing power failure.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: October 6, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Yoshimoto, Masatomo Ohno, Tetsuo Kanazawa