Patents by Inventor Takahisa Tatarazako

Takahisa Tatarazako 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).

  • Apparatus and method for controlling damping force exhibited in vehicular damping force variable shock absorber
    Patent number: 5671142
    Abstract: In a suspension control system for a vehicle having a plurality of damping force variable shock absorbers, at least either or both of positive and negative dead zone threshold values (.+-.X.sub.2i0') are reduced to a predetermined value (X.sub.2i00'), for example, zero until a zero crossing counter CNT indicates a predetermined value CNT.sub.0, the zero crossing counter CNT counting the number of time a vertical sprung mass velocity X.sub.2i' crosses a zero point thereof, when an absolute value .vertline.X.sub.2i' .vertline. of the sprung mass vertical velocity oscillated due to oscillation inputs from a running road surface is equal to or exceeds a predetermined positive or negative sprung mass vertical velocity upper or lower limit threshold value (X.sub.2i1').
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: September 23, 1997
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Takahisa Tatarazako