Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1996-01-04
1996-10-08
Thorpe, Timothy S.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137494, 417560, F16K 3112
Patent
active
055621228
ABSTRACT:
A fluid valve device for on-off control of fluid flow through a passage extending between two fluid ports (12, 15) and including a valve seat (17A) comprises a hollow valve member (21) which is movable into and out of sealing engagement with the valve seat and defines a valve chamber (20). The valve chamber (20) communicates with one of the fluid ports (15) through the valve seat (17A) and is associated with a valve member actuating device (A) which translates the pressure of the fluid received in the valve chamber (20) from an inlet (12/14) for the fluid flow into a force acting on the valve member to displace it relative to the valve seat (17A). The valve member actuating device in one embodiment includes a thrust surface (A) on the valve member (21) which is directed away from the valve seat and forms part of the wall of the valve chamber (20). A second thrust surface (C) on the valve member (21) is directed oppositely and defines a chamber (V) which is isolated from the valve chamber and the flow passage. A positive-displacement pump includes the fluid valve device as an inlet valve for controlling the admission into the pump chamber (20) of the fluid being pumped.
REFERENCES:
patent: 1284951 (1918-11-01), Buckland et al.
patent: 1284952 (1918-11-01), Buckland et al.
patent: 3886969 (1975-06-01), Shira et al.
Humanteknik A.B.
McAndrews, Jr. Roland G.
Thorpe Timothy S.
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