Patent ID: 7055509

Claim:
A breather device of an engine comprising a first case, a crankcase, an intake system, a cam chamber having a cam configured to drive a valve train disposed on a cylinder head of the engine, a crankshaft, and a crank chamber, the breather device, comprising: a first portion disposed in the crankcase; a second portion disposed in the first case, the second portion comprising a main opening and a gas discharge port connected to the intake system, and the main opening facing the cam chamber; a gasket having first and second communication ports, the gasket being disposed between the first and second portions of the breather device and being configured to allow flow communication therebetween via the first and second communication ports; and an oil outlet, wherein an oil and a gas in a blowby mixture entering the breather device through the main opening and flowing through the first and second portions and the first and second communication ports are separated from each other, the separated gas leaving the breather device through the gas discharge port, and the separated oil leaving the breather device through the oil outlet.