Patents by Inventor Toyoji Negi

Toyoji Negi 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).

  • Planetary gear of automatic transmission
    Patent number: 5052991
    Abstract: In an overdrive planetary gear unit of an automatic transmission, a helical planetary pinion has its front portion cut to form an cutout portion and to have an axial-direction cross section asymmetrical in the direction of its rotation axis in order to uniformize, in the axial direction, the load imposed upon a bearing disposed around the circumference of the pinion shaft.In a front planetary gear unit of a main transmission of the automatic transmission, a helical planetary pinion has its rear portion cut to form an cutout portion and to have an axial-direction cross section asymmetrical in the direction of its rotation axis in order to uniformize the load imposed upon a bearing disposed around the circumference of the pinion shaft.It is thereby possible to reduce the weight of each planetary pinion and, hence, the centrifugal force acting on the pinion.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: October 1, 1991
    Assignees: Aisin AW Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Kozo Yamaguchi, Toyoji Negi, Tadashi Kondo, Kunihiro Iwatuki