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:
Sep. 01, 2009
Filed:
Feb. 25, 2008
Akira Yamanaka, Tokyo, JP;
Akira Yamanaka, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An electronic apparatus includes a case, a fan, a plurality of electronic parts, and a heat sink mounted for each electronic part. The heat sink includes a fluid unit, and a shutter plate controlling the quantity of air flowing in the heat sink through an action of the fluid unit actuated by heat of the electronic part. The fluid unit includes a container with liquid. The container is heated from the electronic part. When generated heat of the electronic part is large, the fluid inside the container expands, allowing the shutter plate to operate in an opening direction increasing the quantity of air flowing in the heat sink, and in a case when a generated heat quantity of the electronic part is small, the fluid inside the container shrinks, allowing the shutter plate to operate in a closing direction reducing the quantity of air flowing in the heat sink.