Patent ID: 8814067

Claim:
An apparatus for directing pressurized air comprising: a body for receiving pressurized air, the body including opposing side walls, a top surface joining the opposing side walls, a first end joining the top surface and the opposing side walls, a second end joining the top surface and the opposing side walls, and a bottom opening defining an elongated shape bounded by the opposing side walls, the first end and the second end, where the opposing side walls converge toward the bottom opening at a predetermined angle of convergence; at least one interchangeable nozzle insert configured to match the elongated shape of the bottom opening, the at least one interchangeable nozzle insert positioned within the bottom opening by means of at least one fastener which passes through the at least one interchangeable nozzle insert and the opposing side walls, where the pressurized air can exit the body substantially only through the at least one interchangeable nozzle insert, where the at least one interchangeable nozzle insert includes a plurality of discharge orifices for directing the pressurized air outwardly from the body, and where each of the discharge orifices includes a conical portion for receiving the pressurized air from the body, each of the conical portions having an opening angle which is substantially the same as the angle of convergence of the opposing side walls, and each of the discharge orifices further includes a cylindrical portion for directing the pressurized air outwardly from the body; and at least one air inlet, the at least one air inlet suitably attached to the second end for directing the pressurized air into the body.