Aerosol metering valve construction

Claim 1

IN AN AEROSOL VALVE CONSTRUCTION, IN COMBINATION: (A) A VALVE HOUSING HAVING AN UPPER ANNULAR VALVE SEAT, (B) A VALVE STEM MOVABLE IN THE VALVE SEAT AND HAVING AN ENLARGEMENT COOPERABLE WITH THE SEAT TO CLOSE THE PASSAGE THERETHROUGH, (C) SAID STEM HAVING A PORTION OF REDUCED CROSS SECTION ABOVE THE ENLARGEMENT TO PERMIT PASSAGE OF AEROSOL SUBSTANCE THROUGH THE SEAT WHEN THE STEM IS SHIFTED DOWNWARD, (D) A DEPRESS BUTTON COMPRISING A HEAD ENLARGEMENT CARRIED BY THE STEM TO EFFECT DOWNWARD MOVEMENT THEREOF, (E) SAID HEAD ENLARGEMENT HAVING A DISCHARGE PASSAGE THROUGH IT, AND (F) A PAIR OF COOPERABLE MUTUALLY ENGAGEABLE NORMALLY SEPARATED CONDUIT MEANS CONNECTED RESPECTIVELY WITH THE DEPRESS BUTTON AND ANNULAR VALVE SEAT, PROVIDING A CONTINUOUS PASSAGE SURROUNDING PORTIONS OF THE STEM LOCATED ABOVE THE SAID ENLARGEMENT AND ALSO LOCATED BETWEEN THE SEAT AND THE DISCHARGE PASSAGE OF THE BUTTON WHEN THE BUTTON AND THE VALVE STEM ARE IN DOWNWARDLY SHIFTED POSITION, THEREBY TO CONDUCT THE CONTENTS OF THE VALVE HOUSING OUT THROUGH THE PASSAGE IN THE BUTTON, BOTH OF SAID CONDUIT MEANS EXTENDING COMPLETELY AROUND AND ENCOMPASSING AT LEAST PART OF THE PORTION OF REDUCED CROSS SECTION OF THE VALVE STEM, ONE OF SAID CONDUIT MEANS BEING RESILIENT AND YIELDING WHEN ENGAGED UNDER PRESSURE BY THE OTHER.