Detachable water pipe freeze preventing device

Details Detachable water pipe freeze preventing device Detachable water pipe freeze preventing device

1978-12-07

1980-06-03

Schwadron, Martin P.

Fluid handling

Freeze condition responsive safety systems

Low temperature responsive drains

733682, 251 636, 251147, F16K 1736

Patent

active

042056985

ABSTRACT:
An improved device for easy attachment to an external water spigot, which is designed to allow a slight dripping of water when ambient temperatures drop below a point at which there is a danger of water freeze, within house pipes or spigot. The present device has a simple moving valve, or water release shaft, which extends axially between a closed volume of a particular fluid, and a valve seat proximate the connection of the device to the spigot outlet. The improved temperature responsive valve taught herein ensures a most efficient opening function, during temperature drops below approximately 32.degree. F. by employing a closed fluid volume that is unaffected by the temperature of any released water. Further, the particular improvements involve a specially configured liquid chamber piston which ensures a large opening excursion, at desired temperature range.

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