Fluid handling – Freeze condition responsive safety systems – Low temperature responsive drains
Patent
1989-01-03
1989-08-01
Walton, George L.
Fluid handling
Freeze condition responsive safety systems
Low temperature responsive drains
137 79, 236 93R, 236102, 236103, 237 80, F16K 3164, E03B 712
Patent
active
048526010
ABSTRACT:
A self-actuating drip valve for attachment to a standard outdoor faucet for the prevention of freezing of such exposed faucets and water pipes leading to the faucet. A tube includes a collar at one end for securing to the end of the faucet. A stem extends within the tube so as to be adjacent the faucet. One or more ports extend between the faucet and the interior of the tube. The distal end of the stem mates with an orifice through the distal end of the tube. The tube and stem have different coefficients of expansion, one being plastic and the other being metal. In practice, the tube is attached to the faucet, which is open, and is filled with water. When the outside ambient temperature drops, the tube and stem contract at different rates and the relative movement opens the orifice in the distal end of the tube so as to permit water to drip therethrough.
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Benoit John E.
Walton George L.
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