Patents by Inventor Nobutaka Chiaki

Nobutaka Chiaki 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).

  • Electromagnetically operated hydraulic actuator
    Patent number: 4561628
    Abstract: An electromagnetically driven hydraulic actuator for driving an electromagnetic valve for which a larger valve operating force is required. The pilot control valve and the actuator piston are enclosed within the stationary magnetic core of the electromagnetic plunger of the actuator so that a compact driving unit is provided for driving the valve.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: December 31, 1985
    Assignee: Tokyo Keiki Company Limited
    Inventors: Yoshiaki Matsushima, Nobutaka Chiaki, Kuniaki Kato, Toshihiko Horikiri