Patent ID: 7380545

Claim:
An oil separator for separating oil from crankcase gases of an internal combustion engine, said oil drainage device comprising: an inlet; an outlet; and a plurality of stages arranged in a stack between the inlet and the outlet, each stage comprising: a generally upright side wall having opposite top and bottom faces; an end wall disposed at the bottom face of the side wall, said end wall having opposite upper and lower surfaces, said end wall having a bore extending through the upper and lower surfaces for receiving a flow of crankcase gases therethrough; a plate diverting the flow of crankcase gases exiting the bore for creating a pressure increase that separates oil from the crankcase gases; a tube extending through the bore for directing the flow of crankcase gases therethrough, the tube being spaced apart from an inner surface of the bore allowing oil to flow therebetween in an opposite direction relative to the crankcase gases.