Aerosol spray dispenser

An aerosol spray dispenser for use with an aerosol system having an outer flexible product receptacle and an inner propellant receptacle, comprising in combination an inner substantially rigid receptacle to be seated within said outer receptacle and containing a pressurized propellant out of contact with the product to be dispensed;

• a closure closing the top of the inner receptacle and having a valve assembly mounted thereon;
• said valve assembly including a valve housing, a valve stem extending outwardly of said closure, primary and secondary valves for controlling flow from said inner and outer receptacles respectively through the valve stem, and first and second resilient sealing gaskets for sealing the primary and secondary valves;
• a conduit forming a product flow path connected to one end of the valve assembly and extending through the inner receptacle and beyond for extending into the outer receptacle, said conduit being in sealed relation with the inner receptacle at the point where it exits the inner receptacle;
• said valve stem defining upwardly extending product and propellant bores open at their upper ends, one of said bores being in fluid communication with the primary valve and another of said bores being in fluid communication with the secondary valve;
• a spray actuator for mounting on the valve stem and overlying the upper ends of said bores, said spray actuator having a discharge outlet in fluid communication with said bores;
• said spray actuator having a nozzle insert with a Venturi constriction whereby propellant passing from the inner receptacle and through the nozzle insert aspirates product from the outer receptacle resulting in said product and propellant exiting the spray actuator discharge outlet;
• a tertiary valve in the form of a one way valve positioned downstream of the secondary valve in the path of product flow, said tertiary valve opening when the spray actuator is actuated and product is drawn up the conduit from the outer receptacle;
• and, said tertiary valve closing upon clogging of the discharge outlet causing flow of propellant from the propellant bore into the spray actuator when actuated, down the product bore, and through the secondary valve, the tertiary valve closing under the influence of said propellant flow through the secondary valve to prevent propellant passing into the flexible outer receptacle.

An aerosol spray dispenser for use with an aerosol system having an outer flexible product receptacle, an inner propellant receptacle, an aerosol valve having product and propellant bores, and a spray actuator for mounting on the valve stem and overlying the upper ends of said bores, said spray actuator having a nozzle insert with a Venturi constriction whereby propellant passing from the inner receptacle and through the nozzle insert aspirates product from the outer receptacle resulting in said product and propellant exiting the spray actuator discharge outlet, comprising in combination a closure for closing the top of the inner receptacle and having a valve assembly mounted thereon;

• said valve assembly including a valve housing, a valve stem extending outwardly of said closure, primary and secondary valves for controlling flow from said inner and outer receptacles, respectively, through the valve stem, and first and second resilient sealing gaskets for sealing the primary and secondary valves;
• a conduit forming a product flow path connected to one end of the valve assembly for extending through the inner receptacle and beyond to a length approaching the base of the product receptacle to be used with the spray dispenser, said conduit being in sealed relation with the inner receptacle at the point where it exits the inner receptacle;
• said valve stem defining upwardly extending product and propellant bores open at their upper ends, one of said bores being in fluid communication with the primary valve and another of said bores being in fluid communication with the secondary valve;
• a tertiary valve in the form of a one way valve positioned downstream of the secondary valve in the path of product flow, said tertiary valve opening when the spray actuator is actuated and product is drawn up the conduit from the outer receptacle;
• and, said tertiary valve closing upon clogging of the discharge outlet causing flow of propellant from the propellant bore into the spray actuator when actuated, down the product bore, and through the secondary valve, the tertiary valve closing under the influence of said propellant flow through the secondary valve to prevent propellant passing into the flexible outer receptacle.