초록 ▼

A filter cartridge for a gravity-fed water treatment device having a porous particulate filter disposed therein. The porous particulate filter has an open upper end, a closed lower end, and sidewalls therebetween. Water is treated as it flows through the sidewalls of the filter. The cartridge also c

A filter cartridge for a gravity-fed water treatment device having a porous particulate filter disposed therein. The porous particulate filter has an open upper end, a closed lower end, and sidewalls therebetween. Water is treated as it flows through the sidewalls of the filter. The cartridge also contains granular media disposed within the porous particulate filter.

대표청구항 ▼

[ We claim:] [1.]1. A filter cartridge for a gravity-fed water treatment device, comprising:a hydrophilic porous particulate filter having an open upper end, a lower end, and sidewalls therebetween, the hydrophilic porous particulate filter defining an interior volume free from porous particulate fi

[ We claim:] [1.]1. A filter cartridge for a gravity-fed water treatment device, comprising:a hydrophilic porous particulate filter having an open upper end, a lower end, and sidewalls therebetween, the hydrophilic porous particulate filter defining an interior volume free from porous particulate filter media;granular filter media disposed in the interior volume; anda connecting member sealing said hydrophilic porous particulate filter to a portion of the filter cartridge proximate said upper end of said filter;wherein the filter cartridge is configured and arranged to establish, with a pressure of about 0.5 lb/in.sup.2, more than an insubstantial flow rate to allow water to flow by force of gravity through said open upper end, into said interior volume, and through said sidewalls of said hydrophilic porous particulate filter.