Patent ID: 6830686
Filing Date: 2004-12-14
Classification: B01D,C02F

Abstract:
A filter cartridge, said filter cartridge comprising in combination:a) a cylindrical filter element having first and second opposed ends and a central hollow section; b) a first unitary end cap and a second unitary end cap; c) said first unitary end cap including a first annular flange juxtaposed with said first opposed end, a first circular sleeve having a diameter greater than said central hollow section extending from said first annular flange axially away from said filter element, a positioning member bounded by and supported from said first annular flange, said positioning member including a circular shroud extending into said filter element, and a first rim circumscribing said first opposed end; and d) said unitary second end cap including a second annular flange juxtaposed with said second opposed end, a second circular sleeve having a diameter greater than said central hollow section extending from said second annular flange axially away from said filter element, said second circular sleeve having an external diameter of a lesser diameter than the internal diameter of said first circular sleeve whereby said second circular sleeve is adapted to be nested within said first circular sleeve upon longitudinal stacking of two or more of said filter cartridges, and a second rim circumscribing said second opposed end.