Patents by Inventor Hideo Fukutake

Hideo Fukutake 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).

  • Heat storage apparatus and method
    Patent number: 5435380
    Abstract: A heat storage apparatus includes a tank containing a heat storage medium and having an upper region and a lower region for holding the heat storage medium at respective temperatures above and below atmospheric temperature. To reduce heat losses and increase flexibility of use, an intermediate region having heat storage medium is maintained in the tank between the upper and lower regions at a temperature between the upper and lower temperatures. The desired temperature of the intermediate region is maintained by heating or cooling its heat storage medium, for example by use of an otherwise unused low-grade heat source.
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: July 25, 1995
    Assignees: Hitachi, Ltd., Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Akihiro Yamada, Makoto Shimoda, Akira Yamada, Yasuo Koseki, Yoshio Naganuma, Hideo Fukutake, Toshihiro Fukuda