Patent ID: 8210824

Claim:
A knock-down drum fan, comprising: a cylindrical shroud housing having a plurality of identical curved members that attach to one another end to end to form the cylindrical shroud; a front grill having a plurality of identical generally triangular shaped members that together form the front grill; a plurality of front external brace members adjacent to sides of each of the identical grill members, for holding the front grill together, the plurality of front external brace members being identical in number to the plurality of the front grill members; fan blades having a plurality of identical blade members that together form the fan blades; a rear grill having a plurality of identical generally triangular shaped members that together form the rear grill; a plurality of rear external brace members adjacent to sides of each of the identical grill members, for holding the rear grill together, the plurality of rear external brace numbers being identical in number to the plurality of rear grill members; a hub for supporting fan blades within the cylindrical shroud housing between the front grill and the rear grill; a motor inside of the cylindrical shroud housing for rotating the blades; a front cap for covering a central opening in the front grill; and wheels attached beneath the cylindrical shroud for allowing the drum fan to be mobile, wherein the drum fan is assembled from shroud housing, the front cap, the front grill, the rear grill, the hub, the fan blades, the motor, and the wheels.