Patents by Inventor Yutaka Tage

Yutaka Tage 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).

  • Device for controlling 4wd vehicle central differential restriction device according to front and rear wheels rotational speed difference, and method of operation thereof
    Patent number: 4840247
    Abstract: A central differential device for differentially transmitting rotational power from the engine to the front wheel propeller shaft and the rear wheel propeller shaft in a vehicle is locked up step by step to restrict its differential operation gradually when the difference between front wheel rotational speed and rear wheel rotational speed is larger than a reference value while checking at each step before further increasing the degree of locking up if the difference is still larger than the reference value which may be changed for such each step.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: June 20, 1989
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuji Kashihara, Yutaka Tage, Yasunari Nakamura, Hiroshi Ito, Tokuyuki Takahashi