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:
Mar. 13, 2001
Filed:
Nov. 18, 1999
Akitomi Semba, Hitachi, JP;
Tadashi Sonobe, Iwaki, JP;
Takashi Watanabe, Hitachi, JP;
Yasuomi Yagi, Hitachi, JP;
Junji Sato, Hitachi, JP;
Shinsaku Hakuta, Hitachi, JP;
Hideaki Mori, Chiyoda-machi, JP;
Eiji Tsuji, Hitachi, JP;
Kenichi Hattori, Hitachi, JP;
Atsushi Ishihara, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to provide a rotating machine in which the temperature increase distribution inside the machine can be equalized, not only is a primary cooler installed in the primary ventilation passage that extends from the exhaust side of the fans and installed on the rotating axis to the suction side of the fans and via the core, but a secondary cooler is installed in the secondary ventilation passage that is branched from the primary ventilation passage, thus making it possible to further cool part of the cooling medium, which has once been cooled by the primary cooler, by means of the secondary cooler, that is, to cool the cooling medium by circulating it through the coolers twice.