Patents by Inventor Takumi Nozaka

Takumi Nozaka 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).

  • Offset detecting device for trolley-assisted vehicles
    Patent number: 4745997
    Abstract: Offset condition detecting device for detecting offset condition of pantographs from overhead contact wires by means of electric current detected by a contact element mounted on the pantograph and insulated therefrom. The detection is made electrically and in case of emergency the pantographs are lowered down at high speed to prevent damage of pantographs of trolley-assisted vehicles.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: May 24, 1988
    Assignees: Toyo Denki Seizo Kabushiki Kaisha, Komatsu, Ltd.
    Inventors: Hidetoshi Takei, Takumi Nozaka, Teruo Minami