Patent ID: 6537339
Filing Date: 2003-03-25
Classification: B01D

Abstract:
An inside-out reverse air flow filter element comprising:annular filter media having a hollow interior and extending axially along a central vertical axis; an annular upper end cap having a central opening for receiving incoming air flow axially downwardly into said hollow interior; a closed lower end cap spanning said hollow interior, such that air in said hollow interior flows radially outwardly through said annular filter media; said lower end cap being a resilient compressible molded member having molded drainage surfaces comprising: a molded raised central dome shedding moisture radially outwardly and downwardly from said central axis; a plurality of molded drainage holes spaced radially outwardly of said central axis and below the top of said central dome, wherein said molded drainage surfaces further comprise a molded annular trough having a first surface sloped upwardly and radially inwardly toward said central dome, and having a second surface sloped upwardly and radially outwardly toward said annular filter media.