Patent ID: 8171920

Claim:
A device for cleaning crankcase gases from an internal combustion engine, the device comprising; a housing; a rotor rotatably mounted in the housing and having a plurality of tightly separated separating discs which define a central gas flow shaft in fluid communication with a gas inlet chamber which communicates with intervening spaces between the disc elements and with a cavity around the rotor defined by the housing; and a drive device to rotate the rotor; wherein the housing defines an inlet in the housing for crankcase gas, a gas outlet in the housing for cleaned crankcase gas, and an oil outlet in the housing for separated oil, and wherein the housing has an interface surface to be directly mounted to a valve cover of the internal combustion engine, such that the inlet in the housing has a downstream opening, which communicates with the gas inlet chamber, and an upstream opening, which is situated in the interface surface and which by way of an opening in the valve cover communicates directly with the crankcase gas in a space defined by the valve cover, and an essentially semi-cylindrical intermediate wall that is arranged in the cavity between the rotor and a wall part of the housing remote from the valve cover, with a space between the intermediate wall and said wall part defining a shielded chamber communicating with the gas outlet in the housing.