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:
May. 25, 2004
Filed:
Aug. 06, 2001
Makoto Kitano, Tsuchiura, JP;
Takashi Naganawa, Chiyoda, JP;
Yuji Yoshitomi, Chiyoda, JP;
Rintaro Minamitani, Tsukuba, JP;
Shigeo Ohashi, Tsuchiura, JP;
Noriyuki Ashiwake, Tsuchiura, JP;
Yoshihiro Kondo, Chiyoda, JP;
Tsuyoshi Nakagawa, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid cooling system for cooling a high heat generating body, such as a semiconductor element or the like, of the type used in an electronic apparatus that is small and thin in size, or in a personal computer equipped with such a structure therein. The system has a pump of the reciprocal movement type, a heat receiving jacket, a heat radiation pipe, and a connector pipe for connecting those parts with one another so as to form a closed loop filled with a cooling liquid. In the system, &Dgr;Vs is equal to or greater than &Dgr;Vp, wherein the inner volume change when the pump emits pulsation therefrom is &Dgr;Vp, the pressure caused by the volume change is P, and the volume change due to the pressure P that occurs in flow passage of the cooling liquid &Dgr;Vp other than within the pump, is &Dgr;Vs.