Patents by Inventor Yoshiteru Minagawa

Yoshiteru Minagawa 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).

  • Variable steering ratio steering system
    Patent number: 6374693
    Abstract: A variable-ratio steering system includes a steering shaft connected to a manually-operated handle, a ball nut engaging with the steering shaft and a ball-bearing-screw mechanism converting rotary motion of the steering shaft into axial displacement of the ball nut in the axial direction of the steering shaft. Also provided is a second motion converter which generates a rotational displacement of the ball nut about the axis of the steering shaft with the axial displacement of the ball nut. A steering pinion gear block is connected to the ball nut by means of serrations to rotate together with the ball nut. A rack is engaged with the pinion gear block and connected at both ends via knuckle mechanisms to steered wheels for varying a steer angle at the steered wheels depending on the displacement of the rack.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: April 23, 2002
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yoshihiro Kawabe, Yoshiteru Minagawa