Formation and delivery of an atomized liquid

An apparatus for delivering an atomised liquid including a liquid supply means for supplying liquid to an admixing chamber, a gas supply means for separately supplying compressed gas to the admixing chamber, and an atomising means for atomising the liquid evacuated by the supplied compressed gas, wherein the liquid supply means supplies a predetermined quantity of liquid at each actuation of the apparatus and the gas supply means controls the quantity of gas supplied to the admixing chamber to thereby maintain a predetermined mass ratio of the liquid and the supplied compressed gas.

An apparatus according to 20 wherein the axial length of the divergent duct is between 0.5 and 5.0 millimetres.

A liquid metering device including a flexible bladder for containing liquid, the flexible bladder surrounding a body member having a liquid chamber therein, the liquid chamber being in fluid communication with the interior of the flexible bladder, an outer for containing the flexible bladder and the body member, a piston supported within the liquid chamber pumping liquid therefrom, and a pushrod extending from the piston, the piston being integral with the body member, the liquid chamber being provided within the pushrod. wherein movement of the outer shroud relative to the piston results in relative displacement of the piston within the liquid chamber to thereby pump liquid from the liquid chamber.

A liquid metering device including a flexible bladder for containing liquid the flexible bladder surrounding a body member having a liquid chamber therein the liquid chamber being in fluid communication with the interior of the flexible bladder an outer for containing the flexible bladder and the body member, a piston supported within the liquid chamber for pumping liquid therefrom, a pushrod extending from the piston, and a floating valve ring provided in an annular groove in said piston, the floating valve ring sealing the liquid chamber when the piston is displaced in a first direction, and allowing fluid communication with the liquid chamber when the piston is displaced in an opposing direction thereof, wherein movement of the outer shroud relative to the piston results in relative displacement of the piston within the liquid chamber to thereby pump liquid from the liquid chamber.