The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 1995
Filed:
Jan. 11, 1994
Akihiro Yamada, Hitachi, JP;
Makoto Shimoda, Katsuta, JP;
Akira Yamada, Hitachi, JP;
Yasuo Koseki, Hitachi ota, JP;
Yoshio Naganuma, Katsuta, JP;
Hideo Fukutake, Sagamihara, JP;
Toshihiro Fukuda, Tsurugashima, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Plant Engineering & Construction Co., Ltd., Tokyo, JP;
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.