Air admittance valve assembly

Details Air admittance valve assembly Air admittance valve assembly

2005-07-15

2008-09-09

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S533170, C137S533270

Reexamination Certificate

active

07422030

ABSTRACT:
A one directional flow valve assembly for a fluid system. The valve assembly is comprised of a valve body having an internal valve chamber in communication with the ambient environment and a valve seat arrangement. The assembly further has a cap structure with means to position and align a sealing member with respect to the valve seat. A flexible elastomeric sealing diaphragm may be utilized and which is under tension when the sealing diaphragm is in a sealing configuration. The sealing member has a peripheral deflection shield to direct ambient fluid through the valve body. A carrier plate structure may be provided to position the sealing member and deflection shield with respect to the valve seat arrangement to operate the valve assembly.

REFERENCES:
patent: 4535807 (1985-08-01), Ericson
patent: 5201685 (1993-04-01), Raisanen
patent: 6415816 (2002-07-01), Beckey et al.
patent: 6532988 (2003-03-01), Ericson

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