Pressurized dispenser with pressure supplying and maintaining means

Claim 1

A PRESSURIZED DISPENSER COMPRISING A GLASS CONTAINER, FLUID CONTENTS TO BE DISPENSED, PROPELLANT GAS IN SEPARATE PHASE FROM THE DISPENSABLE CONTENTS, A NORMALLY CLOSED DISCHARGE VALVE AND FOAMED SYNTHETIC GAS-PERMEABLE ORGANIC PLASTIC CONTAINING A MULTIPLICITY OF SMALL NON-COMMUNICATING CELLS, THE FOAMED PLASTIC BEING INSIDE THE CONTAINER AND IN CONTACT WITH THE PROPELLANT GAS, THE PLASTIC BEING IMPERMEABLE TO DISPENSABLE CONTENTS AND PERMEABLE TO THE PROPELLANT GAS SO THAT, WHEN IN SUCH GAS UNDER PRESSURE, THE PROPELLANT WILL BE TRANSMITTED THROUGH THE PLASTIC INTO THE INDIVIDUAL SMALL CELLULAR COMPARTMENTS OF THE FOAM, THEREBY BECOMING RELEASABLY CONFINED WITHIN THOSE CELLS AND HELPING TO PREVENT EXPLOSIVE EXPANSION OF THE PROPELLANT AND DANGEROUS SHATTERING OF THE GLASS WHEN CONTAINER PRESSURE IS SUDDENLY DECREASED, DUE TO ACCIDENTAL BREAKING OF THE CONTAINER WALL, WHILE BEING GRADUALLY RELEASABLE FROM THE CELLS AND RESTORING DISCHARGING PRESSURE ON THE FLUID CONTENTS AFTER THE PRESSURE IN THE CONTAINER IS DECREASED, DUE TO OPENING OF THE NORMALLY CLOSED DISCHARGE VALVE.