Patents by Inventor Fumio Iwasaki

Fumio Iwasaki 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).

  • Patent number: 4440093
    Abstract: A vehicle tilt control apparatus has an acceleration detector for detecting vibration in horizontal and lateral direction of a car body, a fluidically operating mechanism disposed between the car body and a truck and compensation circuits for compensating a centrifugal force component and a jolting component, respectively, of the output of the acceleration detector. The outputs of the compensation circuits are added and the resulting output is fed back to actuate a servo valve to control the fluidically operating mechanism. In this manner, the riding comfort to the passengers when the vehicle passes through a curved area and for the jolting is improved.
    Type: Grant
    Filed: June 23, 1981
    Date of Patent: April 3, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Yutaka Kakehi, Katsuyuki Terada, Kenjiro Kasai, Fumio Iwasaki