Air vent valve

Details Air vent valve Air vent valve

2007-09-18

2007-09-18

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S533190

Reexamination Certificate

active

11639930

ABSTRACT:
An air admittance valve assembly for venting ambient air into a system while preventing the escape of gases within the system. A housing includes first and second passageways in fluid communication through a valve seat therebetween. A flat generally thin, flexible, preferably resilient free-floating sealing membrane is positioned for sealing engagement by gravity only atop the valve seat. Ambient air in the second passageway will freely flow into the first passageway and the system at system air pressure less than atmospheric pressure while air within the system is prevented from flowing outwardly therefrom through the valve assembly.

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patent: 2006/0011239 (2006-01-01), Stone
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