Fluid handling – Freeze condition responsive safety systems – With freeze waste
Patent
1997-02-21
1998-02-10
Walton, George L.
Fluid handling
Freeze condition responsive safety systems
With freeze waste
137 61, 137 62, 137 79, 138 27, 138 32, E03B 712, F16K 3164
Patent
active
057158550
ABSTRACT:
A temperature-actuated valve includes an elongated housing having anterior and posterior segments, the anterior segment being connected to an outdoor water supply. A valve within the anterior segment opens in response to freezing temperatures, defining a fluid path that allows water from the outdoor water supply to flow through one or more discharge ports; and which closes when the temperature rises above freezing. The valve generally includes a piston movable within the housing and having a valve head, and a valve seat formed in the anterior housing segment; seating of the valve head against the valve seat closes the discharge port(s). The device also includes means for conducting water from the anterior housing segment to the posterior housing segment, the latter comprising an expansion reservoir for freezing water. When water freezes, its expansion moves the piston so as to unseat the valve head and thereby allow water to be discharged through the discharge port(s). Thawing of the water in the expansion reservoir allows the valve head, under pressure from the outdoor water supply, to reseat.
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