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:
Jan. 17, 2006
Filed:
Jan. 21, 2003
Applicants:
Hisatoshi Hirota, Tokyo, JP;
Tokumi Tsugawa, Tokyo, JP;
Yuusuke Inoue, Tokyo, JP;
Inventors:
Assignee:
TGK Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16K 31/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A differential pressure valve simplified in construction includes a piston integrally formed with a main valve element and arranged on the upstream side of a main valve to define a chamber for introducing refrigerant from an inlet port. The piston has an orifice and a refrigerant passage for communicating with a chamber on a back surface side of the piston. The chamber is configured such that it can be connected, via a refrigerant passage and a pilot valve element, to a chamber on the downstream side of the main valve, which communicates with an outlet port.