Patent ID: 6648064
Filing Date: 2003-11-18
Classification: H01L

Abstract:
An active heat sink comprising:a heat transfer fluid; a heat sink body having a circuit for the transmission of said heat transfer fluid, said circuit adapted to flow past a hot zone and past a cool zone, said heat sink body being composed of a non-magnetic material; a cover adapted to encapsulate said heat transfer fluid inside of said circuit; a first pump gear and a second pump gear adapted to be mounted in said heat sink body and further adapted to be mounted inside said circuit to propel said heat transfer fluid about said circuit, at least one of said pump gear having a plurality of magnets disposed about a diameter of said one of said pump gears; a plurality of field coils disposed outside of said circuit and adapted to create a plurality of magnetic fields in the vicinity of said plurality of magnets such that said magnetic fields and said magnets may exert an attractive or a repulsive force; and a controlling circuit adapted to turn on and off said plurality of field coils to create said plurality of magnetic fields in a sequence such that said pump gear is caused to rotate.