Patent ID: 7232080

Claim:
A nozzle for a spray device comprising a mixing chamber ( 3 ) for a first fluid and a second fluid, said mixing chamber ( 3 ) having an exit orifice ( 24 ), an inlet feed ( 8 ) from an inner tubular passage ( 4 ) suitable for carrying the first fluid, and an inlet feed ( 5 I) from an annular passage ( 5 ) surrounding the inner tubular passage ( 4 ) and suitable for carrying the second fluid, characterised in that the nozzle comprises a means for causing spiral flow around the inner tubular passage ( 4 ) of a fluid passing through the surrounding annular passage ( 5 ), wherein the annular passage ( 5 ) is suitable for carrying liquid to the mixing chamber ( 3 ), the inner tubular passage ( 4 ) is suitable for carrying gas towards the mixing chamber ( 3 ), and the inlet feed ( 8 ) from the inner tubular passage ( 4 ) is suitable for injecting gas into a liquid film formed in mixing chamber ( 3 ).