Abstract: A gun having a gun body which includes a housing for component inlet and outlet passages and for a product flow control valve, which further includes a handle, a nozzle receiver assembly, and a trigger for rotating a spool valve between open, closed, and intermediate positions, and wherein means are provided for controlling the proportion and flow rates of the components within the flowing passages, and to facilitate insertion, locking, and ejection of the nozzle within the gun body.

Abstract: An expansion control mixing and dispensing nozzle adapted for attachment to an associated two-component liquid dispensing gun for mixing and dispensing liquid foamable products. The nozzle includes a mixing chamber, a mixing chamber outlet tube and an outlet tube cover arranged in co-axial relation. The outlet tube cover including an outlet slot or passage in its outer end portion; its inner end surrounds a part of the mixing chamber outlet tube so as to define an annular auxiliary chamber therebetween. The mixing chamber has spaced apart inlet ports for receiving individual liquid components and a baffle or the like to impart a swirling action to the components as they expand in the mixing chamber, a pre-discharge chamber lies between the outlet slot and the end of the outlet cover.