Aerosol container with metering valve

Claim 1

A METERING OUTLET VALVE FOR A PRESSURIZED CONTAINER HAVING AN OPENING AT ONE END THEREOF, INCLUDING A COMBINATION A HOLLOW DEPRESSIBLE STEM AND VALVE IN SAID OPENING; SPRING MEANS NORMALLY HOLDING SAID VALVE IN CLOSED POSITION; A CYLINDRICAL MEMBER HAVING CHAMBER MEANS THEREIN, MOUNTED ON SAID STEM AND INCLUDING A CIRCUMFERENTIAL SEALING SURFACE ADJACENT TO THE UPPER END THEREOF, AS WELL AS AT THE UPPER END THEREOF; HEAD MEANS SLIDABLY MOUNTED ON SAID CYLINDRICAL MEMBER AND HAVING A CIRCUMFERENTIAL SEALING SURFACE SLIDABLY MATING WITH SAID CIRCUMFERENTIAL SEALING SURFACE ON SAID CYLINDRICAL MEMBER ADJACENT TO SAID UPPER END THEREOF, AND A SEAT ADAPTED TO COOPERATE WITH THE SEALING SURFACE AT THE END OF SAID CYLINDRICAL MEMBER, SAID HEAD MEANS HAVING AN OUTLET APERTURE THEREIN AT A LOCATION TO BE OPENED AND CLOSED BY THE SEALING SURFACE AND SEAT ON SAID HEAD MEANS; AND SPRING MEANS HAVING A FORCE VALUE SUBSTANTIALLY LESS THAN THAT OF SAID VALVE SPRING, URGING SAID HEAD MEANS UPWARDLY RELATIVE TO SAID CYLINDRICAL MEMBER SO THAT THE CHAMBER MEANS THEREIN IS PLACED IN COMMUNICTION WITH SAID OUTLET APERTURE, SAID SEALING SURFACE ENGAGING EACH OTHER TO SEAL OFF SAID OUTLET APERTURE WHEN SAID HEAD MEANS IS DEPRESSED RELATIVE TO SAID CYLINDRICAL MEMBER AND BEFORE SAID STEM IS DEPRESSED, FURTHER MOVEMENT OF SAID HEAD MEANS OPENING SAID VALVE TO FILL SAID CHAMBER MEANS.