Patents by Inventor Koji Waseda

Koji Waseda 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).

  • Control systems for automatic transmissions
    Patent number: 5014575
    Abstract: A control system for an automatic transmission employed in a vehicle comprises first and second engaging friction elements provided in the automatic transmission for giving rise to speed change, an operating oil pressure control device for applying operating oil pressure to each of the first and second engaging friction elements in accordance with a predetermined control characteristic so as to change engaging conditions of the first and second engaging friction elements, an information detector for obtaining information of the operating condition of the automatic transmission, and a timing control device for causing the operating oil pressure control device to be operative to adjust a time interval from a time at which the first engaging friction element is changed in its engaging condition to a later time at which the second engaging friction element is changed in its engaging condition in accordance with the information obtained from the information detector, with the information being the revolving speed
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: May 14, 1991
    Assignee: Mazda Motor Corporation
    Inventors: Takuji Fujiwara, Koji Waseda, Akio Matsumoto