Patent ID: 6893478

Claim:
An air/oil separator comprising a rotor and a casing surrounding the rotor, the casing having an inlet at a first axial position for supply of an air and oil mixture into the air/oil separator, the rotor having an outlet for discharging cleaned air from the air/oil separator, the rotor carrying at least one porous member, the at least one porous member having an inlet at a second axial position and an outlet at a third axial position, the third axial position being arranged axially between the first axial position and the second axial position, means to define a first passage for the flow of the air and oil mixture axially from the inlet in the casing to the inlet to the at least one porous member, means to define a second passage for the flow of the cleaned air from the at least one porous member to the outlet in the rotor, whereby in use the air and oil mixture flowing through the at least one porous member flows in the opposite direction to the air and oil mixture flowing through the first passage.