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. 02, 2000
Filed:
Aug. 21, 1997
Applicant:
Inventors:
Assignee:
Fujikoki Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
236 / ; 62225 ;
Abstract
An expansion valve includes a valve body, a valve, a power element, and an aluminum heat sensing shaft. The heat sensing shaft has a hole with a bottom reaching a heat sensing portion thereof. The hole makes the heat transfer area of the heat sensing shaft small. Consequently, in a refrigeration system the response of the expansion valve is relatively insensitive to changes in a heat load of an evaporator. Thus, unwanted hunting phenomenon in the refrigeration system is prevented.