Patents by Inventor Youichi Hiraoka

Youichi Hiraoka 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).

  • Power transfer apparatus for four-wheel drive automotive vehicle
    Patent number: 5511448
    Abstract: A driving power transfer apparatus for four-wheel drive automotive vehicles, has a primary output shaft for providing driving power for a rear propeller shaft and a secondary hollow output shaft for providing driving power for a front propeller shaft, and a drive power transfer, such as a fluid coupling, mounted on the secondary output shaft, for variably transmitting the driving power to the secondary output shaft from the primary output shaft. The secondary shaft is connected to a front propeller shaft via a splined sliding yoke.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: April 30, 1996
    Assignee: Mazda Motor Corporation
    Inventors: Osamu Kameda, Masami Masuno, Yoshitaka Nomoto, Youichi Hiraoka