Abstract: This invention relates in general to a device for controlling the flow of a fluid. The device having a plurality of motor assemblies mounted at equidistant points around a mounting collar. An elongated annular outer casing surrounds and is spaced outwardly from the motor assemblies and defines with the motor assemblies an annular air passage. The outer casing having a central longitudinal axis, an open forward end for receiving ambient air and an open rear end for discharging air forced fluid. The device has a supporting structure on which the outer casing is mounted and a fluid flow assembly. A turntable is coupled to the supporting structure for rotation and an actuating assembly is used for raising and lowering the outer casing, wherein the actuating assembly is coupled between the supporting structure and outer surface of the outer casing.

Abstract: This invention relates in general to a device for controlling the flow of a fluid. The device having a plurality of motor assemblies mounted at equidistant points around a mounting collar. An elongated annular outer casing surrounds and is spaced outwardly from the motor assemblies and defines with the motor assemblies an annular air passage. The outer casing having a central longitudinal axis, an open forward end for receiving ambient air and an open rear end for discharging air forced fluid. The device has a supporting structure on which the outer casing is mounted and a fluid flow assembly. A turntable is coupled to the supporting structure for rotation and an actuating assembly is used for raising and lowering the outer casing, wherein the actuating assembly is coupled between the supporting structure and outer surface of the outer casing.