Combination spray and aerator

In a spray-or-aerator appliance that includes an upstream axially elongated adapter means through which flowing liquid is introduced into the appliance from a source under pressure, and a downstream discharge head shaped and arranged to provide, at the discharge end thereof, two concentric flow passageway means including a relatively large central passageway with an aerator construction therein, and an outer annulus of circumferentially spaced, smaller, spray apertures;

• the improvement comprising, in combination:
• the upstream adapter means having relatively non-rotatable character and being shaped to provide adjacent its downstream end an internal, non-circular, socket means surrounding a central flow passageway;
• the discharge head being axially positioned upon the downstream end of said adapter means and being rotatable relative to said adapter means, the discharge head providing therein an upstream facing central disc with an eccentric aperture therein, said upstream facing disc being operative to substantially close off liquid flow to the large central passageway except through said eccentric aperture;
• an internal diverter member positioned between said upstream adapter means and the discharge head, said diverter member being shaped to provide:
• (a) an upstream non-circular means for interfitting engagement with the non-circular socket means of the upstream adapter means;
• (b) an eccentrically apertured, central disc adapted for abutment with a portion of the central disc of the discharge head;
• and (c) laterally apertured flow means positioned in a flow path between said eccentrically apertured central disc of the diverter member and the circumferentially spaced spray apertures of the discharge head;
• and
• compression seal means positioned between portions of the central discs of the internal diverter and of the discharge head, and surrounding the eccentric aperture in the central disc of the discharge head, for isolating downstream liquid flow in the discharge head either through only the pair of aligned eccentric apertures of the two discs, so that said flow will be directed through the large central passageway of the discharge head, or through an alternate flow path, that includes said laterally apertured flow means of the diverter member when the eccentric apertures are not aligned, that communicates with the outer annulus of smaller spray apertures in the discharge head.