Fluid handling – Freeze condition responsive safety systems – With freeze waste
Patent
1991-10-31
1992-05-19
Walton, George L.
Fluid handling
Freeze condition responsive safety systems
With freeze waste
137 80, 138 27, 138 32, 237 80, 251 66, 251297, F16K 3164, E03B 712
Patent
active
051138913
ABSTRACT:
A water freeze guard valve having a water-filled actuator chamber and a linkage assembly for transmitting linear expansion movement, caused by ice formation within the actuator chamber, to force a poppet disc against the seat of the valve supply port and thereby close the valve when freezing conditions occur, a latch assembly for keeping the valve open prior to freezing weather, a spring to keep the valve closed during the subsequent thaw, and a lever for manually and selectively re-opening the valve. When installed in a water supply line for a building structure that is subject to freezing and thawing conditions, the valve shuts off the supply of water to the building structure during the freeze and prevents further supply of water to the building after the thaw occurs so that the interior of the building is not damaged by flooding.
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patent: 4844412 (1989-07-01), Kubozono
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Lelong Marion P.
Walton George L.
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