Patent ID: 7779794

Claim:
A breather device provided in a 4-cycle engine which is configured to be mounted on a front part of a vehicle body of a snow vehicle, the breather device comprising: a breather chamber integrally provided on a lateral side of the 4-cycle engine, wherein the 4-cycle engine includes a crankcase, a cylinder block coupled to an upper part of the crankcase, and a cylinder head coupled to an upper part of the cylinder block, wherein a cam driving mechanism chamber is provided on the lateral side of the 4-cycle engine, wherein the breather chamber is provided on a lateral side of the cam driving mechanism chamber, wherein the breather chamber includes an upper part monolithically integrated with the cylinder head, and a lower part monolithically integrated with the cylinder block, wherein the upper part of the breather chamber is partitioned into two chambers by a rib extending in a vertical direction, wherein one of the chambers is provided with a communication passage communicating with the cam driving mechanism chamber, and wherein another of the chambers is provided with a breather outlet.