Patents by Inventor Yohichi Hayakawa

Yohichi Hayakawa 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).

  • Torque transfer device for a four wheel drive vehicle
    Patent number: 4422349
    Abstract: A four wheel drive torque transfer device is switchable between two wheel drive and four wheel drive during running operation of a vehicle having an automatic transmission. A reducer permits direct coupling or reduced speed drives. A parking gear associating with the transfer device requires only small modification to the conventional parking mechanism.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: December 27, 1983
    Assignee: Aisin Warner Kabushiki Kaisha
    Inventors: Gohichi Matsumoto, Yohichi Hayakawa