Patent attributes
A breather apparatus of a crankcase, in which lubricating oil is circulated with economy of space and efficiently, is provided. An opening is formed in the top of a vertical wall of a case body, and a breather hole is formed in the top of an outer circumferential wall of the case body. A lubricating-oil return port is formed in the bottom of the vertical wall of the case body, and a breather path communicating with the opening and the lubricating-oil return port is provided between the case body and a power-generator case used as a wall body attached thereto, and an air-breather path branching from the breather path and communicating with the breather hole is provided in the case body. When an oil-component mixed gas flowing through the opening to the outside of the case body hits an inner surface of the breather path, an oil component of the oil-component mixed gas is liquefied and flows into the lubricating-oil return port.
