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. 22, 2001
Filed:
Apr. 06, 2000
Toshiharu Katayama, Tokyo, JP;
Kazuhiko Watanabe, Tokyo, JP;
Fujikoki Corporation, Tokyo, JP;
Abstract
A valve body,of an expansion valve,comprises a valve chamber,to which refrigerant from a compressor is supplied. The amount of refrigerant is controlled between a valve member,and a valve seat,and travels through a first passage,to an evaporator. The refrigerant returning from the evaporator travels through a second passage,and into the compressor. The valve chamber,is equipped with a bypass passage which is communicated through a narrow hole,to an opening,with a bottom, and through a conduit,to the first passage,The electromagnetic valve,comprises a plunger,and opens/closes the bypass passage by a pilot valve,A pressure switch,is equipped to an opening,communicated to the second passage,and when the pressure of the refrigerant returning from the evaporator is reduced, the valve,is operated and the bypass passage is opened.