Patent 8235672 was granted and assigned to LG on August, 2012 by the United States Patent and Trademark Office.
A fan includes a hub and a plurality of blades formed on the hub with a rake angle. In an axial direction of the hub, no part of a trailing edge of any of the blades is disposed past an air outlet end of the hub at more than a distance approximately equal to 25% of a diameter of the hub.