Valve constructions for aerosol containers

Claim 1

A METERING VALVE CONSTRUCTION FOR AN AEROSOL CONTAINER COMPRISING A TANK MEMBER, MEANS HOLDING THE TANK MEMBER IN POSITION ON THE AEROSOL CONTAINER, MEANS FORMING A METERING CHAMBER IN SAID TANK, A VALVE STEM, MEANS SUPPORTING SAID VALVE STEM FOR MOTION BETWEEN TWO POSITIONS TO FILL THE METERING CHAMBER AND SELECTIVELY TO CAUSE DISCHAGE OF THE METERING CHAMBER, AN EXIT PORT IN SAID VALVE STEM, MEANS IN SAID VALVE STEM NORMALLY PROVIDING COMMUNICATION BETWEEN THE INTERIOR OF THE AEROSOL AND THE METERING CHAMBER BUT PREVENTING SUCH COMMUNICATION WHEN THE VALVE STEM IS IN METERING CHAMBER DISCHARGE POSITION, A TANK GASKET, SAID TANK GASKET HAVING AN ENLARGED PORTION SURROUNDING THE VALVE STEM AND NORMALLY CLOSING THE EXIT PORT, SAID ENLARGED PORTION COMPRISING A CYLINDRICAL SLEEVE OR LIKE MEMBER SURROUNDING THE PORTION OF THE VALVE CONTAINING THE LATERAL PORT, SAID SLEEVE-LIKE MEMBER EXTENDING ABOVE AND BELOW THE MAIN BODY OF THE GASKET, THE PORTION OF THE SLEEVE-LIKE MEMBER EXTENDING ABOVE THE GASKET BEING ENGAGED IN A MATING, ANNULAR, CYLINDRICAL RECESS IN THE VALVE STEM, MEANS ON SAID VALVE STEM ENGAGING THE ENLARGED PORTION OF THE TANK GASKET WHEREBY THE TANK GASKET IS MOVABLE AND DISTORTED BY THE VALVE STEM AS THE VALVE STEM IS MOVED INWARDLY WITH RELATION TO THE METERING CHAMBER TO DISCHARGE POSITION, SAID VALVE STEM EXTENDING GENERALLY THROUGH THE TANK GASKET, THE ENLARGED PORTION OF SAID TANK GASKET BEING DISTORTED AND FLARED BY SAID VALVE STEM IN THE MOTION THEREOF INWARDLY, SAID DISTORTION OPENING SAID EXIT PORT TO THE METERING CHAMBER FOR THE DISCHARGE OF THE CONTENTS OF THE METERING CHAMBER OUT THROUGH THE EXIT PORT.