Title:
EXPANSION VALVE
Document Type and Number:
WIPO Patent Application WO/2019/012810
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an expansion valve with an improved ring spring. This expansion valve comprises: a valve main body provided with a valve chamber; a valve body disposed within the valve chamber; a biasing member for biasing the valve body toward a valve seat; an operating rod for pressing the valve body in a valve opening direction against the biasing force of the biasing member; and a ring spring disposed between the outer peripheral surface of the operating rod and the inner peripheral surface of the valve main body. The ring spring is provided with: a ring section; three or more elastic protrusion sections protruding further inward than the ring section and in contact with the outer peripheral surface of the operating rod; and at least one outward protrusion section protruding further outward than the ring section and in contact with the inner peripheral surface of the valve main body.
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Inventors:
MOGI TAKASHI (JP)
KUBOTA KOUHEI (JP)
MATSUDA RYO (JP)
HONDA SHIN (JP)
YAMASAKI KURATO (JP)
ITO SHIGEKI (JP)
KUBOTA KOUHEI (JP)
MATSUDA RYO (JP)
HONDA SHIN (JP)
YAMASAKI KURATO (JP)
ITO SHIGEKI (JP)
Application Number:
PCT/JP2018/019607
Publication Date:
January 17, 2019
Filing Date:
May 22, 2018
Export Citation:
Assignee:
FUJIKOKI CORP (JP)
DENSO CORP (JP)
DENSO CORP (JP)
International Classes:
F25B41/06
Foreign References:
| JP2014173807A | 2014-09-22 | |||
| JP2008014628A | 2008-01-24 | |||
| JP2014149128A | 2014-08-21 | |||
| JPH08145505A | 1996-06-07 | |||
| JP2009192198A | 2009-08-27 | |||
| JP2018025332A | 2018-02-15 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY DAI-ICHI KOKUSAI TOKKYO JIMUSHO (JP)
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