Spray valve for protruding stem

Claim 1

A VALVE STRUCTURE FOR AEROSOL PACKAGES IN WHICH THERE IS A CANISTER ADAPTED TO HAVE A PRESSURIZED PRODUCT THEREIN, AND THE CANISTER HAVING A TOP OPENING, THE VALVE STRUCTURE ADAPTED TO BE SEALED INTO THE OPENING, AND COMPRISING: A. A COVER MEMBER HAVING MEANS FOR SEALINGLY SECURING SAME INTO SAID TOP OPENING, A CENTRAL VALVE MOUNTING FORMATION HAVING A PASSAGEWAY THEREIN, B. A VALVE HOUSING SECURED TO SAID FORMATION, C. A DIP TUBE SECURED TO SAID HOUSING AND ADAPTED TO EXTEND DOWNWARD INTO SAID CANISTER WHEN SAID VALVE STRUCTURE IS MOUNTED TO THE CANISTER, D. AN ANNULAR GASKET HAVING A CENTRAL OPENING THEREIN, AND THE GASKET BEING SECURED IN SAID FORMATION WITH ITS CENTRAL OPENING ALIGNED WITH THE PASSAGEWAY AND HELD IN PLACE BY SAID HOUSING, E. A COMBINED VALVE PLUNGER AND STEM HAVING (1) AN ANNULAR BODY PORTION OF DIAMETER SUBSTANTIALLY GREATER THAN THAT OF SAID CENTRAL OPENING RECIPROCABLE IN SAID HOUSING, (2) A HOLLOW STEM PORTION SUBSTANTIALLY PERMANENTLY CONNECTED WITH THE BODY PORTION, AND SLIDINGLY BUT SEALINGLY ENGAGED THROUGH SIAD CENTRAL OPENING AND PASSAGEWAY TO HAVE AN END PROTRUDE FROM SAID COVER MEMBER TO PRESENT A CYLINDRICAL STEM THEREAT, (3) A VALVE SEAT FORMED ON THE BODY PORTION SURROUNDING THE STEM PORTION AT THE JUNCTURE OF SAID STEM PORTION WITH THE BODY PORTION, (4) SPRING MEANS IN THE HOUSING URGING THE PLUNGER IN A DIRECTION TO PRESS THE VALVE SEAT AGAINST THE BOTTOM SURFACE OF THE GASKET, F. THE STEM PORTION OF SAID COMBINED VALVE PLUNGER AND STEM HAVING A HOLLOW BORE EXTENDING AXIALLY FORM AN OUTER END IN THE PORTION OF THE STEM PROTRUDING FROM THE COVER MEMBER TO AN INNER END WITHIN THE BODY AND BEYOND SAID VALVE SEAT, G. A METERING ORIFICE FORMED IN THE PLUNGER IN THE VICINITY OF SAID JUNCTURE AND PROVIDING COMMUNICATION BETWEEN SAID HOLLOW BORE AND THE EXTERIOR OF SAID STEM PORTION, H. A SLOT IN SAID PLUNGER EXTENDING RADIALLY OUTWARD FROM SAID BORE AND AXIALLY DOWNWARD FROM SAID METERING ORIFICE TO SAID INNER LOWER END OF SAID BORE, SAID INNER END OF SAID BORE OTHERWISE BEING BLOCKED, AND I. A PUSH BOTTOM WITH EXTERNAL SPRAY OPENING AND HAVING A SOCKET THEREIN, REMOVABLY MOUNTED ON THE PROTRUDING END OF THE STEM AND ADAPTED TO BE PRESSED AXIALLY TO FORCE THE STEM PORTION AND HENCE THE PLUNGER INTO THE HOUSING AGAINST THE PRESSURE OF THE SPRING MEANS TO GIVE FREE ACCESS FOR PRESSURIZED PRODUCT PAST THE VALVE SEAT FROM THE HOUSING, THROUGH THE HOLLOW BORE AND OUT SAID SPRAY OPENING.