Patents by Inventor Kumio Hirata

Kumio Hirata 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).

  • Refractory brick segment for a heat regenerator
    Patent number: 5127463
    Abstract: A refractory brick segment for use in a heat regenerator is made of an electrocast refractory material in the shape of a tube. The brick segment has a wall thickness of from 35 mm to 75 mm and a substantially rectangular cross-section. All of an inner side wall, an outer side wall and a corner wall have concave portions so as to have a total volume which is from 0.4 times or more to 0.85 times or less as large as that of a corresponding brick segment having no concave portions and a surface area per volume unit which is 1.5 times or more as large as that of a corresponding brick segment having no concave portions.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: July 7, 1992
    Assignee: Toshiba Monofrax Co., Ltd.
    Inventors: Kumio Hirata, Yasuo Saito