Patent ID: 8074705

Claim:
A fastener assembly for securing a heat sink to a printed circuit board, the fastener assembly comprising: a sleeve comprising a hollow body, a bottom plate at a bottom thereof and an engaging cylinder extending downwardly from the bottom plate, wherein the engaging cylinder therein defines a through hole communicating with the hollow body and has at least one latching protrusion projecting outwardly, and wherein the at least one latching protrusion has a flat annular surface in a top thereof and a tapered lower portion having an outer diameter decreasing gradually in a direction from the top toward a bottom of the engaging cylinder; a bolt comprising a shaft, a head at an end of the shaft and a threaded part formed at an opposite end thereof adapted for threadedly engaging with a retainer of the printed circuit board, the head being received in the sleeve above the bottom plate, the shaft being received in the through hole of the sleeve whilst the threaded part is held beneath the engaging cylinder of the sleeve; and a resilient component held between the head of the bolt and the bottom plate of the sleeve.