Patent ID: 8579588
Filing Date: 2013-11-12
Classification: F04D

Abstract:
1. A fan assembly comprising: a mount that is adapted to be installed on the wall of a building; a motor attached to the to the mount, the motor having a shaft; a hub assembly coupled to the shaft of the motor so that the hub is rotated by the shaft of the motor, wherein the hub assembly includes a main portion that defines a plurality of openings and wherein the hub assembly further includes a plurality of arm members that are detachably mounted within the openings; a plurality of fan blades having a minimum length of 5 feet, wherein the plurality of fan blades are coupled to the arm members so as to extend outward from the main portion of the hub assembly such that rotation of the motor results in rotation of the fan blades; wherein the fan blades are contoured and the arm members are contoured so that the inner surface of the fan blade engages with the outer surface of the arm member so that force is directed from the arm member to the fan blade by the engagement therebetween; and wherein the arm members define indentations and the fan blade define protrusions that are positioned within the indentations when the fan is positioned over the arm member that the protrusions engage with the indentations.