Patent ID: 6938835

Claim:
A full coverage area spray nozzle comprising an oscillation chamber having an upstream end plate and a downstream end plate, an inlet aperture d 1 in said upstream end plate coupled to a source of pressurized liquid to be sprayed on said area and issuing a jet of liquid into said oscillation chamber, an outlet aperture d 2 at said downstream end for issuing a jet of said pressurized liquid to ambient, the walls of said oscillation chamber being defined by a line revolved about an axial line passing through said inlet aperture and said outlet aperture d 2 , said end plates have a diameter D and the distance between said inlet and outlet apertures is L and ratio L/D determines the spray pattern and is adapted to support a basic toroid flow pattern that remains captive within the confines of said oscillation chamber, said toroid spinning about its cross-sectional axis and being supplied energy from the jet of liquid issued into said oscillation chamber, said toroidal flow pattern having diametrically opposed cross-sections which alternate in size to cause the jet to move in radial paths and also in tangential direction and thereby choose a different radial path at each sweep, whereby there is a random sweeping of the jet issuing from said outlet aperture over said area.