Patents by Inventor Kunio Hoshiya

Kunio Hoshiya 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).

  • Ferro fluidic seal
    Patent number: 4424974
    Abstract: An improved ferro fluidic seal assembly having a cylindrical permanent magnet, a pair of ring-shaped yokes coupled coaxially with said magnet, and a fresh fluid storage containing ferro magnetic fluid mounted in a room defined by said magnet and yokes. Said fresh fluid storage is composed of a resilient elongated member like a stainless steel belt adapted and fixed in a circular shape along the surface of the magnet, and supplies fresh fluid to the clearance gaps defined between said yokes and a rotational body to seal said clearance gaps.
    Type: Grant
    Filed: July 28, 1982
    Date of Patent: January 10, 1984
    Assignee: Nippon Telegraph & Telephone Public Corp.
    Inventors: Yasunaga Mitsuya, Kunio Hoshiya, Shigemitsu Oguchi, Reizo Kaneko