Patent ID: 8497608

Claim:
An electric machine module comprising: an electric machine including a rotor assembly, the rotor assembly including a rotor hub, the rotor hub including at least one rotor hub channel and at least one rotor hub outlet; an output shaft, the rotor hub substantially circumscribing a portion of the output shaft, and the output shaft comprising at least one output shaft channel and at least one output shaft coolant outlet; an axial seal substantially contacting an outer diameter of the output shaft; a cavity formed by at least the output shaft, the rotor hub, the axial seal; and a sleeve substantially circumscribing a portion of the output shaft and at least a portion of the sleeve positioned substantially within the cavity and between the outer diameter of the output shaft and the inner diameter of the rotor hub, the sleeve comprising at least one groove, and the sleeve being configured and arranged to substantially seal a portion of the cavity.