Patent ID: 7618233

Claim:
An improved air conditioner condenser or heat pump fan assembly consisting essentially of: a diffuser housing having an opening therethrough and interior walls therethrough; a plurality of rotating blades attached to a hub, the hub being mounted in the diffuser housing, each of the blades having a leading edge, a tip edge and a trailing edge; an approximately 1 and ½ inch wide and approximately 3/16 inch thick plastic single foam strip attached to line completely around the interior walls of the diffuser housing where the tips of the blades sweep closest to the interior walls, the foam strip reducing spacing between the tips of the rotating blades and the interior walls of the housing, the foam strip for both increasing air flow of up to approximately 15% and increasing air moving efficiency of up to approximately 45%, and also for reducing sound noise emissions from the housing; tip plastic foam strips attached to all of each tip edge of the rotating blades; trailing edge plastic foam strips attached to all of each trailing edge of the rotating blades, the tip foam strips and the trailing edge foam strips for additionally reducing sound noise emissions from the housing and for increasing air flow from the rotating blades.