Patent ID: 8758605

Claim:
A filter cartridge, comprising: a filter block having a wall with (i) an exterior surface that includes a cylindrical shaped lower portion and a frustoconical shaped upper portion, and (ii) an inner surface that includes a cylindrical shaped lower portion and a frustoconical shaped upper portion; a filter holder for housing the filter block comprising a top member coupled with a bottom member; wherein the top member includes an exterior surface having a plurality of vents extending therethrough and adjacent to the frustoconical shaped upper portion of the exterior wall of the filter block; wherein the bottom member of the filter holder includes (i) an outer tubular wall enclosing the cylindrical shaped lower portion of the exterior surface of the filter block, and (ii) an inner tubular wall having a plurality of vents extending therethrough and adjacent to the cylindrical shaped lower portion of the inner surface of the filter block; wherein the outer tubular wall and the inner tubular wall of the bottom member are concentric and define a circular slot for receiving the cylindrical shaped lower portion of the filter block; and an annular flange extending radially outward from the bottom member.