Patent ID: 6387260
Filing Date: 2002-05-14
Classification: B01J,C02F

Abstract:
In combination, a) a filter cartridge for liquid purification comprising a housing having a top, a bottom, and a side wall, and having a filtration chamber therein characterized in that it has a sealed cavity in tile upper portion thereof; a liquid inlet in said housing to permit liquid to flow from an unpressurized source of liquid to be purified into the filter cartridge; means for providing a vacuum in the sealed cavity comprising a tubular element having an inlet in the sealed cavity and extending from the sealed cavity to a point below the bottom of the filter cartridge housing, purified liquid being removed from the filter cartridge through said tubular element; a path for the flow of liquid within said filter cartridge, said path proceeding from said liquid inlet in the housing, upwardly through said filtration chamber, into said sealed cavity, and out of said filter cartridge through said tubular element; and further including filter media positioned within said filtration chamber; and b) a container for liquid to be purified, said container having upper and lower sections, said upper section having sides and a bottom; wherein the filter cartridge is positioned inside and at the bottom of the upper section and receives liquid to be purified from said container; and wherein said tubular element for removing purified liquid from the filter cartridge tends from the top of the sealed cavity to below both the liquid inlet in the housing and the bottom of said upper section of the container; and wherein the bottom of the filter cartridge has a convex form and the corresponding lower part of the upper section of the liquid container has a concave form, the liquid inlet is at the bottom of the housing, and the filter cartridge is stated in the concavity in the bottom wall of the upper section of the liquid container, whereby substantially complete removal of liquid from the upper section of the container can be achieved.