Air admittance valve

Details Air admittance valve Air admittance valve

2008-07-08

2008-07-08

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S533250, C137S550000, C251S356000

Reexamination Certificate

active

11059134

ABSTRACT:
In some embodiments, an air admittance valve includes a base, a screen plate and a diaphragm engageable with the screen plate. The diaphragm may include a first center disk having a stem and a membrane coupled to the first center disk. The membrane may have a continuous material sized to extend beyond a perimeter of the first center disk, be formed of a material more pliable than the first center disk and be adapted to be coupled to the first center disk through the center disk stem.

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