Patent ID: 7609522
Filing Date: 2009-10-27
Classification: F28F,H01L

Abstract:
1. A heat sink assembly compatible with an advanced technology extended (ATX) motherboard and a balanced technology extended (BTX) motherboard, the heat sink assembly comprising: a base adapted for contacting with a heat generating device on one of the ATX and BTX motherboards, a slot defined in the base; a plurality of fins mounted on the base; and a fastener for fixing the base to the heat generating device, the fastener extending through the base and being slidable horizontally along the slot from a first position to a second position; wherein the fastener comprises a screw having a head and a shaft extending downwardly from the head, and a spring mounted around the shaft and located between the head of the screw and the base; wherein the slot has two ends, and each of the ends terminates with an aperture communicating with the slot, the aperture is used for providing passage of the fastener; wherein a step portion is formed in the aperture for supporting the spring thereon; wherein a recess is defined in the shaft of the screw thereby forming an engaging portion at the recess, and the engaging portion is slidable along the slot in the base; wherein the engaging portion has an outer diameter smaller than a width of the slot and a height larger than that of the base; and wherein an annular pad engages with the engaging portion and abuts against a joint of the engaging portion and the shaft at a bottom of the engaging portion.