Patent ID: 6824074
Filing Date: 2004-11-30
Classification: B05B

Abstract:
An external mix air atomizing spray nozzle assembly comprising a nozzle body having a liquid passage through which a pressurized liquid can be directed, a spray tip nose portion at a downstream end of the nozzle body defining a circular liquid discharge orifice, an air cap mounted in surrounding relation to said spray tip nose portion, said air cap having a central opening in which said spray tip nose portion is disposed, said air cap central opening and spray tip nose portion defining an annular air orifice coaxial with said liquid discharge orifice for communication with a pressurized air source and for directing an annular pressurized air stream for interacting with liquid discharging from said liquid discharge orifice, said spray tip nose portion extending outwardly beyond a central end face of said air cap a distance corresponding to about the diameter of said liquid discharge orifice, said air cap having a plurality of angled air passages disposed radially outwardly of said annular air passage for communication with a pressurized air source and for directing air streams at an angle to the axis of said annular air passage and liquid discharge orifice for further interacting with and controlling the liquid discharge from said liquid discharge orifice, and said spray tip nose portion having a downstream end portion that is inwardly tapered in a downstream direction relative to the axis of said annular air passage and liquid discharge orifice over which pressurized air passes prior to interacting with liquid discharging from said liquid discharge orifice.