US 6,638,426 B1 · Water purifying apparatus

Abstract

A structure for venting of gasses from fluids, and in particular, venting of gasses from filter elements or filter media used in water treatment devices. The structure incorporates a fluid flow diverter having a vent tube, tangential flow diverter and a lower air collection space to vent air from an interface between stages of the filter cartridge. The vent structure is particularly suited to systems having a pressure drop of 1 psi or less, such as those systems which filter a fluid by a pressure differential generated by gravity alone, or aided by a manual pressurization means. There is also disclosed a multi-stage filter cartridge, incorporating the vent structure, and having an upper stage including granular carbon and a lower stage including a plurality of hollow fibers.

Claims6

Dependent claims

A gravity-fed fluid filter, comprising:

a housing having at least one fluid entry port and at least one filtered fluid exit port;
a first filtration medium disposed intermediate to said fluid entry port and filtered fluid exit port;
a second filtration medium disposed intermediate to said first filtration medium and said filtered fluid exit port;
a venting system disposed intermediate to said first and second filtration media, said venting system including a tangential fluid diverter configured and arranged to separate a fluid flow into a first region of liquid flow and a second region of non-liquid flow to thereby vent gases therefrom, said gasses being vented countercurrently to said fluid flow whereby an air-to-air interface is maintained.

1 more element

Dependencies are inferred from the claim text.

Water purifying apparatus

Life of this patent

Water purifying apparatus

Life of this patent

Abstract

Claims6