Patent ID: 7717233

Claim:
An oil tank for an engine-driven vehicle, the oil tank comprising: a tank body comprising a generally cylindrical inner wall, a top end and a bottom end, the tank body inner wall being joined to the tank body top end and the tank body bottom end, an oil chamber positioned within the tank body, the oil chamber comprising a generally cylindrical inner wall, a top end and a bottom end, the oil chamber inner wall being joined to the oil chamber top end and the oil chamber bottom end, the oil chamber inner wall being radially spaced from the tank body inner wall; a passage being formed through a lower portion of the oil chamber inner wall such that an oil chamber volume defined within the oil chamber is in fluid communication through the passage with a tank body volume defined between the oil chamber and the tank body; a tank oil inlet communicating with the oil chamber volume through an upper portion of the oil chamber wall and a tank oil outlet communicating with the tank body chamber through a lower portion of the tank body; and a blow-by gas chamber comprising a blow-by gas inlet that is external to the oil chamber and in fluid communication with an upper portion of the tank body and a blow-by gas outlet, the blow-by gas inlet being connected to the blow-by gas outlet by a curved air path.