Abstract: A spray nozzle has a nozzle body defining therein a tubular chamber with an outer wall of generally circular cross-section. A generally coaxial discharge orifice at an end of this chamber has a bounding surface externally of the chamber which forms an included angle toward the chamber of less than 110.degree. with the axis of the chamber. Passage means are provided in the nozzle body to receive a flow of liquid to be sprayed and having an outlet arranged to discharge the liquid into the chamber as an annulus about the axis of the chamber. Means is provided for directing gas under pressure into the chamber in a flow path past the outlet and out the orifice, with any chamber wall portions defining the flow path between the outlet and the orifice being convergent toward the orifice in the direction of flow.

Abstract: Dispensing apparatus has a body defining therein a tubular chamber with an outer wall of generally circular cross-section. A generally coaxial discharge orifice at an end of this chamber is closed by a first valve that includes a member of generally circular cross-section. That member also forms an inner chamber wall and defines with the outer chamber wall an annular discharge passage that is convergent towards the discharge orifice. An annular outlet is in one of the chamber walls and first passage is arranged to supply liquid to be dispensed to the annular outlet for discharge into the discharge passage. Second passage is provided for directing gas under pressure into the chamber for flow through the discharge passage, past the annular outlet and out the orifice.