Patent ID: 8323002

Claim:
A heat dissipation device comprising: a heat sink; a cooling fan mounted on the heat sink for providing a forced airflow towards the heat sink, the cooling fan comprising a fan housing and an impeller received in the fan housing, the impeller comprising a hub and a plurality of fan blades extending radially from the hub, a shaft extending from the hub and having a distal end protruded out of the fan housing, a fan pulley arranged around the distal end of the shaft; an electric motor comprising a driving pulley corresponding to the fan pulley of the cooling fan; a belt having one end engaging with the driving pulley of the electric motor and an opposite end engaging with the fan pulley of the cooling fan for associating the electric motor with the shaft of the impeller of the cooling fan, rotation of the driving pulley of the electric motor being transferred to the fan pulley via the belt to cause the impeller of the cooling fan to rotate; and another cooling fan and another belt, the another cooling fan being provided with another fan pulley, the another belt associating the fan pulley of the cooling fan with the another fan pulley of the another cooling fan, wherein the cooling fans are arranged laterally side by side, the belt being perpendicular to the another belt.