Filter cartridge with check valve protection

Details Filter cartridge with check valve protection Filter cartridge with check valve protection

2007-04-23

2008-09-02

Menon, Krishnan S (Department: 1797)

Liquid purification or separation

Structural installation

Geographic

C210S120000, C210S121000, C210S123000, C210S109000, C210S263000, C210S290000, C210S429000, C210S436000, C215S307000, C215S308000, C215S309000, C215S311000, C217S074000, C217S110000

Reexamination Certificate

active

07419591

ABSTRACT:
A filter assembly is provided that includes a hood, a drain manifold, a filter disposed between the hood and the drain manifold, a drainage space that is disposed between and in fluid communication with both the filter medium and the drain manifold, a check valve that is configured to permit air to escape but not to enter the drainage space so that a siphon can be established that draws additional fluid through the filter medium and into the drain manifold, the siphon continuing until air entering the hood disrupts the siphon, and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged.

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