Patent ID: 8505521

Claim:
A breather apparatus for an engine, the engine being constructed to guide blowby gas from a crankcase to an air intake system of the engine, and being constructed so that the blowby gas passes through at least part of a cam chamber of the engine, and one end of a camshaft of the engine being located in the part of the cam chamber, the breather apparatus comprising: a rotation separator that is fixed to the one end of the camshaft and that rotates together with the camshaft; a separator housing that is fixed to a cylinder head so that the separator housing faces the rotation separator, the separator housing having an air intake on the one end thereof that connect to the cam chamber, and having an air outlet on the other end thereof that connects to the air intake system; and a reed valve attached to the air intake to open and close the air intake; wherein the reed valve allows the blowby gas to flow from the cam chamber to the air intake system through the air intake and the air outlet by opening the air intake when a pressure inside the cam chamber exceeds a specified value; the rotation separator has a base plate section fixed to the one end of the camshaft, and a plurality of protruding plates extending from an outer circumferential portion of the base plate section toward a direction which is away from the camshaft; and the plurality of protruding plates, by rotating together with the camshaft, remove oil mist from the blowby gas that flows from the cam chamber to the air intake system through the reed value.