Patents by Inventor Kazuo Hatsumi

Kazuo Hatsumi 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).

  • Flywheel device having metal disk and resin portion and method of producing the flywheel device
    Patent number: 5820010
    Abstract: A flywheel device for use in a magnetic recording/reproducing unit or the like which device is simple in construction, and can be produced at low costs, and a method of making it. A capstan shaft is press-fitted in a hole formed in a central portion of a metal disk, and then a resin is filled on an outer peripheral portion and a central portion of the disk by outsert molding to form an outer peripheral resin portion and a central resin portion. The outer peripheral resin portion has a groove formed in an outer periphery thereof, and the central resin portion has gear portions.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: October 13, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junya Takahashi, Yutaka Hino, Kazuo Hatsumi, Takashi Ichihara