Fluid handling – Faucets and spouts
Patent
1992-03-23
1993-04-20
Nilson, Robert G.
Fluid handling
Faucets and spouts
251 51, 251 52, 251339, F16K 2116
Patent
active
052033767
ABSTRACT:
A self-shutting egress valve comprises a hollow valve body having an annular valve seat provided in a lower portion thereof, a valve piston movably positioned within the valve body and having an escape valve provided on an upper portion thereof, and a push rod depending from the valve piston. The valve body has an orifice and a set of inlet apertures formed respectively on a top portion and around a lower periphery thereon. The valve piston carries an annular, elastic flow controlling element thereon which engages the walls of an upper chamber in the valve body. A set of apertures formed around an upper portion of the push rod is in communication with the escape valve thereabove. Pushing up on the push rod opens the escape valve and thrusts the valve piston upward into the upper chamber of the valve body causing fluid to flow downwards therethrough and also around the flow controlling element. Fluid flows through the inlet apertures and out an egress space between the valve piston and valve seat once the two are separated. The valve piston automatically descends within the upper chamber under the action of fluid entering therein through the orifice with the escape valve and the flow controlling element preventing backflow.
REFERENCES:
patent: 1995792 (1935-03-01), Brown
patent: 2710736 (1955-06-01), Miller
patent: 3920216 (1975-11-01), Barnum
patent: 4940206 (1990-07-01), Sheen
patent: 4981160 (1991-01-01), Tein
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