Patent ID: 7178552
Filing Date: 2007-02-20
Classification: F16K,Y10T

Abstract:
1. A valve comprising: a valve casing; a valve chamber defined between a fluid inlet and a fluid outlet of the valve casing; and a plurality of check valve mechanisms arranged in series within the valve chamber, the plurality of check valve mechanisms each including: a valve seat having a valve hole formed therein; and a valve body fixed to a valve shaft and arranged on a fluid outlet side of the valve seat, the valve shaft passing through the valve hole of the valve seat and movably supported on a fluid inlet side and the fluid outlet side of the valve seat, the valve body being adapted to move away from the valve seat to open the valve hole when applied with a fluid pressure acting in a direction from the fluid inlet side to the fluid outlet side and adapted to move toward and into contact with the valve seat to close the valve hole when applied with a fluid pressure acting in a direction from the fluid outlet side to the fluid inlet side; wherein, of the valve shafts to each of which the valve body constituting each the check valve mechanism is fixed, a fluid outlet side end portion of the valve shaft to which the valve body constituting one check valve mechanism is fixed and a fluid inlet side end portion of the valve shaft to which the valve body constituting another check valve mechanism is fixed are capable of fitting engagement with each other so as to be axially slidable relative to each other.