Metering button cap for pressurized container valves

Claim 1

A BUTTON CAP FOR CONVERTING INTO A METERING VALVE A CONTINUOUS FLOW VALVE FOR THE OUTLET OF A PRESSURIZED CONTAINER HAVING A TUBULAR VALVE STEM DEPRESSIBLE TO OPEN THE OUTLET VALVE, SAID BUTTON CAP COMPRISING AN INVERTED CUPLIKE CASING MEMBER HAVING A FLEXIBLE OUTER END WALL AND A TUBULAR MEMBER MOUNTED FOR SLIDING MOVEMENT WITHIN THE CUPLIKE MEMBER, THE TUBULAR MEMBER CONNECTED TO THE OUTER END OF THE TUBULAR VALVE STEM AND FORMING THEREWITH A METERING CHAMBER, THE CASING MEMBER HAVING A SPRAY NOZZLE PASSAGE EXTENDING THROUGH THE SIDE WALL THEREOF, THE OUTER ENDS OF THE TWO MEMBERS BEING ADJACENT ONE ANOTHER AND COOPERATING TO FORM VALVE MEANS FOR CONTROLLING FLOW TO THE NOZZLE FROM THE METERING CHAMBER, THE OUTER END WALL OF THE CASING MEMBER HAVING A RIGID CENTRAL PORTION FORMING THE VALVE MEMBER AND SURROUNDED BY AN ANNULAR FLEXIBLE PORTION SO AS TO PERMIT THE APPLICATION OF FINGER PRESSURE TO THE END OF THE CASING MEMBER TO ACTUATE THE VALVE MEANS AND TO PERMIT SAID PRESSURE TO BE TRANSMITTED TO THE TUBULAR MEMBER AND THENCE TO THE VALVE STEM TO OPEN THE VALVE THEREOF AND CAUSE THE METERING CHAMBER TO BE FILLED, UPON THE RELEASE OF THE FINGER PRESSURE THE VALVE STEM MOVING TO CLOSE THE VALVE AND THE ANNULAR FLEXIBLE PORTION OF THE SAID END WALL PERMITTING THE VALVE MEANS TO OPEN UNDER THE PRESSURE OF THE MATERIAL WITHIN THE METERING CHAMBER.