Patents by Inventor Hokuto Takeuchi

Hokuto Takeuchi 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 of vehicle automatic transmission
    Patent number: 4942530
    Abstract: An automatic transmission including a torque converter and a multiple stage transmission gear mechanism. A hydraulically actuated brake and a hydraulically actuated clutch is provided for alternate engagement to select alternately one of two adjacent gear stages. In order to prevent gear shift shock, the engaging of the clutch or the brake is controlled so that the engaging rate is faster for a predetermined time period in an initial period of a gear shifting operation than in a remainder period. A control circuit is provided to monitor the gear shifting operation and modifying the predetermined time period in accordance with the results of the latest gear shifting operation and store the modified value for the use in a next gear shifting operation.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: July 17, 1990
    Assignees: Mazda Motor Corporation, Japan Automatic Transmission Co., Ltd.
    Inventors: Keiji Boda, Kouichirou Waki, Kazuo Niide, Hiroaki Yokota, Keizo Yanagisawa, Hokuto Takeuchi