Patent ID: 8210241
Filing Date: 2012-07-03
Classification: F04D,H01L

Abstract:
1. A heat sink fan comprising: a heat sink including a base portion centered on its center axis and a plurality of fins arranged on an outer peripheral surface of the base portion and extending outward from the base portion in a radial direction perpendicular to or substantially perpendicular to the center axis; a fan arranged above and coaxial with the heat sink and including an impeller rotatable about the center axis to generate an axially downward air flow, a motor rotating the impeller, and a housing surrounding the impeller and supporting the motor, the impeller including a plurality of blades which are arranged about the center axis and extend outward in the radial direction, wherein the housing includes: at least one of the plurality of arms includes an attachment portion with a mounting member arranged to attach the heat sink fan to another device, an axially uppermost portion of the mounting member being higher than an axially uppermost portion of the heat sink; and the plurality of fins include a plurality of recesses arranged on lower surfaces of the plurality of fins and arranged to engage with the engagement portions.