Patents by Inventor Naoki Tajima, deceased

Naoki Tajima, deceased 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).

  • Four-wheel steering system for automotive vehicles
    Patent number: 5060743
    Abstract: A four-wheel steering system for an automotive vehicle includes a front wheel steering mechanism operable in response to a steering effort applied thereto to steer a pair of dirigible front road wheels, a rear wheel steering mechanism arranged to steer a pair of dirigible rear road wheels in response to steerage of the front road wheels, and a control apparatus arranged to control the rear wheel steering mechanism in such a manner that the rear road wheels are retained in their neutral positions when the front road wheels are steered at an angle less than a predetermined small angle and that the rear road wheels are steered in an opposite direction relative to the front road wheels when the front road wheels are steered at a larger angle than the predetermined small angle.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: October 29, 1991
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Susumu Oda, Masami Aga, Takashi Kajiwara, Naoki Tajima, deceased