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:
Feb. 19, 1985
Filed:
Jun. 21, 1983
Shigeaki Kuroda, Shimizu, JP;
Takao Senshu, Shizuoka, JP;
Kensaku Oguni, Shimizu, JP;
Taketoshi Mochizuki, Shimizu, JP;
Hiromu Yasuda, Shizuoka, JP;
Kyuhei Ishibane, Shimizu, JP;
Akira Atsumi, Shimizu, JP;
Hideyuki Kimura, Ibaraki, JP;
Toshio Hatada, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An expansion valve has a refrigerant inlet passage, a refrigerant outlet passage, a valve chest to which both the passages open, a diaphragm chamber communicating with a heat-sensitive bulb through a tube of small diameter, and a valve body actuated in response to the operation of a diaphragm, the valve body being disposed facing a valve seat in the valve chest to regulate a passage defined between the valve seat and the valve body, to thereby control the flow rate of a refrigerant. The valve seat is adapted to be axially movable along the inner wall of the valve chest. In addition, means are provided for moving the valve seat in accordance with a change in pressure in the refrigerant circuit.