Yard hydrant with drain port check valve

Details Yard hydrant with drain port check valve Yard hydrant with drain port check valve

2008-07-22

2008-07-22

Lee, Kevin L (Department: 3753)

Fluid handling

Hydrant type

Protection against freezing

C137S272000, C137S854000, C137S107000

Reexamination Certificate

active

07401620

ABSTRACT:
A yard hydrant having a valve body with a drain port and a check valve mounted adjacent to the drain port to allow water to flow from the hydrant through the drain port to the ground and prevent ground water from flowing into the hydrant through the drain port and contaminating the water source.

REFERENCES:
patent: 1349062 (1920-08-01), Goldberg
patent: 2913000 (1959-11-01), Roberts
patent: 3858599 (1975-01-01), Carlson
patent: 3980097 (1976-09-01), Ellis
patent: 4483361 (1984-11-01), Jungbert, Sr.
patent: 4842018 (1989-06-01), White et al.
patent: 5289840 (1994-03-01), Anderson
patent: 6684900 (2004-02-01), McKeague

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