Patent ID: 7882855

Claim:
An impinging air duct, comprising: an opening at one end of the air duct, wherein an air flow enters the air duct through said opening, an outer shell comprising three sides that run the length of the impinging air duct, wherein two of said three sides are two sidewalls that are perpendicular to a third of said three sides, a columnating plate connected to said outer shell, and comprising a plurality of orifices disposed thereon, a cover plate over said columnating plate comprising a plurality of cover plate orifices thereon, and a multi-tapered ramp channel connected to said outer shell so that it is within a pocket formed by said three sides of said outer shell, and there is a gap between said multi-tapered ramp channel and said side walls, wherein said multi-tapered ramp channel comprises a ramp and two ramp sidewalls connected to said ramp, wherein said multi-tapered ramp channel partially directs said air flow through said orifices of said columnating plate, and wherein said air flow that is partially directed through said orifices of said columnating plate by said ramp channel passes through said plurality of cover plate orifices on said cover plate.