Freezeless hydrant

Details Freezeless hydrant Freezeless hydrant

2008-04-04

2010-11-09

Lee, Kevin L (Department: 3753)

Fluid handling

Processes

Cleaning, repairing, or assembling

C137S301000, C137S218000, C137S360000

Reexamination Certificate

active

07828005

ABSTRACT:
A freezeless hydrant includes an operating screw positioned within a head member, an operating coupling mating with the operating screw, an operating rod coupled to the operating coupling and a plug and a valve seat. Movement of the operating rod in one direction disengages the plug from the valve seat permitting water to flow through the casing and an opening of a set screw forcing a ball against an O-ring seal. Movement of the operating rod in an opposite direction causes alignment of a radial opening in the operating coupling with a passageway in the operating screw. The operating rod engages the valve seat preventing water from flowing through the casing and allowing the ball to fall away from the O-ring seal. Air enters a chamber of the operating screw thereby draining water from the chamber and out of the radial opening of the operating coupling.

REFERENCES:
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patent: 01219223 (1989-09-01), None
Zurn, Ecolotrol Anti-Siphon, Non-Freeze Wall Hydrant, X-1310, 1975.

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