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:
Nov. 13, 2012
Filed:
Mar. 30, 2009
Shu Yanagisawa, Tokyo, JP;
Ryo Matsuda, Tokyo, JP;
Daisuke Watari, Tokyo, JP;
Hiroshi Yokota, Tokyo, JP;
Shu Yanagisawa, Tokyo, JP;
Ryo Matsuda, Tokyo, JP;
Daisuke Watari, Tokyo, JP;
Hiroshi Yokota, Tokyo, JP;
Fujikoki Corporation, Tokyo, JP;
Abstract
A pressure control valve is provided with a valve main body () having a valve chamber () with a valve seat portion (), a refrigerant inflow port () and a refrigerant outflow port (), and a pressure response element () having a diaphragm () defining an upper surface of a valve chamber () and driving a valve body () and a lid-like member () defining a sealed pressure chamber () together with the diaphragm () and having a concave portion (), an inert gas having a thermal expansion coefficient not more than a predetermined value is enclosed within said sealed pressure chamber (), and an internal volume of the sealed pressure chamber is set such that the valve body () comes to a full-open state when that the pressure of the valve chamber () becomes a predetermined pressure or more higher than the pressure at which said valve body starts opening.