NORMALLY CLOSED VALVE HAVING MINUTE FLOW AMOUNT REGULATING MECHANISM

Title:

NORMALLY CLOSED VALVE HAVING MINUTE FLOW AMOUNT REGULATING MECHANISM

Document Type and Number:

WIPO Patent Application WO/2006/093036

Kind Code:

A1

Abstract:

[PROBLEMS] To provide a normally closed valve having a minute flow amount regulating mechanism. [MEANS FOR SOLVING PROBLEMS] This normally closed valve comprises a valve stem opening and closing a flow passage, a piston body movably fitted airtight to a cylinder and moved in a valve opening direction against an energization means energizing the valve stem in a flow passage closing direction, and a stopper mechanism restricting the maximum movement position of the piston body in the valve opening direction. The stopper mechanism comprises a stroke adjusting member threaded to the cylinder coaxially with the valve stem so that its position can be adjusted and having, at its tip part, a convergent annular taped surface facing the piston body, a movable valve opening restriction surface formed on the piston body on the radial outer side of the annular tapered surface and a fixed valve opening restriction surface formed integrally with the cylinder and facing the movable valve opening restriction surface either of which is formed of a tapered surface narrowing an interval between these both restriction surfaces toward the outer periphery thereof, and a plurality of balls allowed to simultaneously come into contact with all of the convergent annular tapered surface, the movable valve opening restriction surface, and the fixed valve opening restriction surface.

Inventors:

EJIRI TAKASHI (JP)

Application Number:

PCT/JP2006/303380

Publication Date:

September 08, 2006

Filing Date:

February 24, 2006

Export Citation:

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Assignee:

FUJIKURA RUBBER LTD (JP)
EJIRI TAKASHI (JP)

International Classes:

F16K31/122; F16K7/17

Foreign References:

JPH08170755A	1996-07-02
JP2001027354A	2001-01-30
JPH10299915A	1998-11-13
JPH06294472A	1994-10-21
JPH0659669U	1994-08-19
US5007328A	1991-04-16

Other References: