Patent ID: 7438065

Claim:
A breather device in an engine including a cylinder head having a timing-gear chamber that accommodates a cam sprocket fixed to one end of a rotatably supported camshaft and communicates with a crank chamber, the cam sprocket being rotatable in conjunction with a crankshaft rotatably supported within the crank chamber, the breather device removing oil mist from blow-by gas in the engine and allowing the blow-by gas to be circulated into an intake system, the breather device comprising: an oil separator having a base attached to the one end of the camshaft and a plurality of fins that are spaced apart from each other and project from the base in a direction away from the camshaft; a side cover including a cover body detachably attached to a side-cover attachment part and a breather housing having a tubular portion that projects into the timing-gear chamber from the cover body and is open towards the camshaft, the side-cover attachment part being provided beside the timing-gear chamber and having an opening that faces a side surface of the cam sprocket; and a breather pipe disposed in the cover body and allowing the blow-by gas inside the oil separator to be circulated into the intake system, wherein the breather housing has a plurality of openings in the tubular portion thereof and covers the oil separator in a rotatable manner.