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:
Jan. 20, 1976
Filed:
Mar. 14, 1974
Toshitsugu Hara, Tokyo, JA;
Motokazu Uchida, Tokyo, JA;
Yasushige Kashiwabara, Musashino, JA;
Michio Yanadori, Hachioji, JA;
Hitachi, Ltd., , JA;
Abstract
A heat transfer device comprises two kinds of liquid having different boiling points and specific gravities, said two kinds of liquid being not mutually dissolvable and charged in a vessel so as to form two layers therein in superimposed relation to each other. In the heat transfer device, a large amount of heat is transferred at temperatures above a certain temperature but unidirectionally, while no heat transfer is effected at temperatures below the aforesaid certain temperature. The heat transfer device is suited for use in such apparatus or machines which require a thermally valving function, especially for use in a refrigerator.