Patent ID: 6647973
Filing Date: 2003-11-18
Classification: F01M

Abstract:
A two stage filtration assembly for a crankcase ventilation system comprising:a housing having a first stage chamber and a second stage chamber communicating with said first stage chamber; a first stage filtration assembly communicating with said first stage chamber, said first stage filtration assembly including a first filtration media; and a second stage filtration assembly disposed in said second stage chamber, said second stage filtration assembly including a second stage web filtration media; wherein air passing through said housing serially passes through said first and second filtration media; and wherein said second stage filtration assembly further comprises: a perforated can having a first end and an opposite second end, said can defining a cavity therewithin; a first end cap connected to said first end, said first end cap having an aperture aligned with said cavity; and a second end cap connected to said second end, said second end cap closing said cavity at said second end; wherein said web filtration media is pleated and overlays said can and is trapped between said first and second end caps.