Aerosol valve construction

Claim 1

A VALVE FOR USE WITH A PRESSURIZED PACKAGE, COMPRISING (A) A COVER MEMBER ADAPTED TO BE INSTALLED IN SAID PACKAGE; (B) A HOUSING FORMED IN SAID COVER MEMBER AND ENCLOSED BUT FOR A FIRST PASSAGEWAY ADAPTED TO COMMUNICATE WITH THE INTERIOR OF THE PACKAGE AND A SECOND PASSAGEWAY COMMUNICATING TO THE EXTERIOR OF THE COVER MEMBER, (C) GASKET MEANS INSTALLED ADJACENT THE SECOND PASSAGEWAY, (D) AN INTEGRAL ASSEMBLY COMPRISED OF A VALVE PLUNGER PART AND A STEM PART RECIPROCABLE IN THE HOUSING AND BIASED TO PRESS THE VALVE PLUNGER AGAINST THE GASKET MEANS TO PREVENT DISCHARGE OF THE PRESSURIZED PRODUCT, AND A PORTION OF THE STEM PROTRUDING THROUGH THE SECOND PASSAGEWAY HAVING THE OUTER END THEREOF ARRANGED TO REMOVABLY RECEIVE A SPRAYHEAD, (1) THE VALVE PLUNGER INCLUDING A CUP MEMBER HAVING A VALVE SEAT ON ITS UPPER RIM AND A HOLLOW BLIND-BOTTOM SOCKET COAXIAL WITH THE VALVE SEAT, (2) THE STEM PART HAVING AN EXTENSION ON THE AXIAL END THEREOF OPPOSITE THE END PROTRUDING THROUGH SAID SECOND PASSAGEWAY, AND A BORE EXTENDING THROUGH SAID STEM PART INCLUDING SAID EXTENSION, (3) AN AXIALLY EXTENDING SLOT IN SAID EXTENSION COMMUNICATING LATERALLY WITH THE BORE AND OPENING AXIALLY TO THE END OF SAID STEM OPPOSITE SAID PROTRUDING END, (4) THE AXIAL END OF SAID STEM CARRYING SAID EXTENSION BEING FIXEDLY ENGAGED WITHIN THE SOCKETED PORTION OF THE CUP MEMBER WHEREBY THE BOTTOM OF SAID SOCKET CLOSES OFF ONE END OF SAID BORE, THE OTHER END OPENING TO THE EXTERIOR OF SAID COVER.