Patents by Inventor Kiyoto Yonekura

Kiyoto Yonekura 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).

  • Elliptic gear having a constant velocity portion
    Patent number: 5170677
    Abstract: An elliptic gear having a constant velocity portion, wherein a pitch circle is a closed curve composed of: a constant velocity portion pitch curve, in which the radius from the center of rotation is a constant arc; and an inconstant velocity portion pitch curve, which is expressed by a formula of an ellipse in polar coordinates having its pole located at the center of rotation and which merges smoothly into the constant velocity portion pitch curve.
    Type: Grant
    Filed: November 14, 1992
    Date of Patent: December 15, 1992
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kiyoto Yonekura, Takashi Yamamoto, Atsushi Umemura, Atsushi Mizuta