Patent ID: 7667969

Claim:
A heat sink arrangement for the cooling of electronic devices, said arrangement comprising: a heat transfer structure having stationary components and containing a fluid media for conducting heat from said electronic devices; a fluid media pumping structure for circulating said fluid media in a cooling flow path to implement the cooling of said electronic devices, said fluid media pumping structure operating integrally with said fluid media-containing heat transfer structure, said fluid media pumping structure, including a rotatable element comprising a centrifugal impeller located in said cooling flow path, intermediate and rotatable with respect to the stationary components of said heat transfer structure, said cooling flow path of said fluid media extending along an end surface of the rotatable element of said heat transfer structure in proximity with heat-generating components of said electronic devices so as to convectively and conductively remove heat therefrom, and said cooling flow path of said fluid media extends along outer surface portions of said rotatable element to enhance the cooling effect on said heat-generating components; said rotatable component of the heat transfer structure comprising an upstanding shaft member having a heat-dissipating element mounted on the upper end thereof; and wherein said fluid media pumping structure includes a flow separator to direct a convective fluid media current along the surface portions.