Patent ID: 6852148
Filing Date: 2005-02-08
Classification: B01D,F01M,Y10S

Abstract:
1. An arrangement for use in separating a hydrophobic liquid aerosol phase, from a gas stream, during filtration of engine crankcase gases; the arrangement comprising: a first stage coalescer filter defining a flow passageway and including a nonwoven fibrous bundle extending across the flow passageway and having a first upstream surface area; and a second stage filter comprising pleated media positioned downstream from the nonwoven media of fibers of the first stage coalescer; the pleated media of the second stage filter having a second upstream surface area; the first upstream surface area being no more than 10% of the second upstream surface area; the arrangement characterized in that: (a) the arrangement includes a first end cap and a second end cap; (b) the second stage filter comprises a tubular construction of pleated media extending between the first end cap and the second end cap; (c) the first stage coalescer filter is oriented in extension across the gas stream inlet aperture; and (d) the pleated media of the second stage filter, the first end cap, the second end cap, and the first stage coalescer filter are unitary in construction.