Swimming pool vacuum relief safety valve

Details Swimming pool vacuum relief safety valve Swimming pool vacuum relief safety valve

2005-03-08

2009-02-24

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S514000, C004S504000, C004S509000, C251S064000, C417S306000

Reexamination Certificate

active

07493913

ABSTRACT:
A vacuum relief safety valve includes a housing defining an inner chamber and attached to the suction-side of the swimming pool or spa pump. An air inlet aperture is formed in the housing so as to be open to ambient air. A sealing element is disposed within the housing and biased against the air inlet aperture by a spring so as to effectively seal the inner chamber of the housing from ambient air. When a maximum allowed vacuum level within the pump is exceeded, such as when a swimming pool drain is obstructed, the sealing element moves into the inner chamber and opens the air inlet aperture causing the pump to rapidly lose its prime and enabling removal of the entrapment.

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