Patent ID: 6134746
Filing Date: 2000-10-24
Classification: A47L

Abstract:
A hand held power nozzle for use with a carpet and upholstery deep cleaning appliance, said hand held power nozzle comprising:a) a cleaning liquid applicator for applying cleaning liquid to a surface to be cleaned;b) a suction nozzle having a nozzle inlet for removing soiled cleaning liquid from a surface to be cleaned and a nozzle outlet;c) a suction tube extending from said nozzle outlet;d) an agitator for scrubbing a surface to be cleaned;e) an air powered turbine for driving said agitator, said turbine comprising a substantially disc-shaped turbine housing defined by first and second substantially circular spaced and parallel end walls joined by a peripheral wall, a substantially disc-shaped turbine rotor rotatably mounted in said turbine housing, a plurality of turbine inlet passages passing through said peripheral wall of the turbine confluently communicating an interior of said turbine housing directly with ambient atmosphere and at least one turbine outlet opening passing through one of said first and second end walls into fluid communication with an opening in the suction tube, whereby suction in the suction tube draws ambient air through the turbine for driving the turbine; andf) wherein said peripheral wall of said turbine has a substantially cylindrical inner peripheral surface and an outer peripheral surface spaced radially outward of said inner peripheral surface, and each of said plurality of turbine inlets includes (i) a leading edge wall defined by a surface extending from said outer peripheral surface of said peripheral wall to said inner peripheral surface of said peripheral wall and (ii) a trailing edge wall defined by a surface extending from said outer peripheral surface of said peripheral wall to said inner peripheral surface of said peripheral wall, said leading and trailing edge walls each form an acute angle with said inner peripheral surface, whereby said plurality of turbine inlet passages impart a tangential component to the air flow entering said turbine through said turbine inlet passages for driving said turbine rotor.