Patent ID: 7660110

Claim:
A computer system comprising: a chassis; an electronic component disposed within said chassis; and a cooling fan disposed within said chassis, wherein said cooling fan comprises: a motor support fixed to a housing that is coupled to said chassis; a hub disposed within said housing, wherein a plurality of blades extend radially from said hub; a motor disposed within a motor enclosure formed by said motor support and said hub, wherein said hub is rotatably coupled to said motor such that the plurality of blades generates a flow of air around the motor enclosure; and a motor cooler comprising a flow path through the motor enclosure, wherein the flow path has a first opening and a second opening; wherein the second opening is disposed within an area of lowered downstream pressure so as to develop a differential pressure between the first and second openings and generate a flow of air through the motor enclosure; wherein the first opening comprises a single aperture through said hub and a cavity within said hub.