Dual air admittance valve
OwnerMichael Anthony Di Monteinventor
Life of this patent
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Abstract
Embodiments of air admittance valve assembly and plumbing system incorporating the same are provided herein. In some embodiments, a valve assembly to allow or stop a flow for use with enclosed environment includes a housing having, an inlet disposed at a first end of the housing fluidly coupled to environment surrounding housing, an outlet disposed at a second end of housing fluidly coupled to enclosed environment, and an interior volume divided into a first zone, a second zone, and a third zone; a first valve having a first valve seat and a first sealing member urged by an existing force between a closed or open position; and a second valve having a second valve seat and a second sealing member urged by an existing force between a closed or open position.
Claims3
A valve assembly comprising:
- a housing;
- and
- a first check valve comprising a first valve sealing member and a first valve seat;
- and
- a second check valve comprising a second valve sealing member and a second valve seat;
- and
- a flexible membrane;
- and
- an inlet;
- and
- an outlet;
- and
- a first zone;
- and
- a second zone;
- and
- a third zone;
- and
- an isolated volume positioned between the flexible membrane and the housing;
- and
- wherein the inlet and the outlet are at a first end portion of the housing;
- and
- wherein the flexible membrane is coupled to a second end portion of the housing opposite the first end of the housing;
- and
- wherein the first zone is position between the inlet and the first check valve;
- and
- wherein the second zone is position between the first check valve and the second check valve;
- and
- wherein the third zone is position fluidly between the second check valve and the outlet;
- and
- wherein the flexible membrane is disposed in the third zone coupled to the
- housing fluidly separating the isolated volume from the third zone;
- and
- wherein the flexible membrane flexes based upon a pressure differential between the third zone and the isolated volume for alleviating some or all of the backpressure.
Dependencies are inferred from the claim text.