Metered valve construction

Claim 1

A METERING VALVE CONSTRUCTION FOR CONTROLLING THE DISCHARGE OF FLUID MATERIAL UNDER PRESSURE FROM A CONTAINER, SAID VALVE CONSTRUCTION COMPRISING (A) A ONE-PIECE VALVE TANK OF GENERALLY HOLLOW TUBULAR SHAPE, AN EXTERNAL FLANGE ON SAID TANK ADJACENT AN END THEREOF, A CAP HAVING A CENTRAL APERTURE CLAMPING THE FLANGE AND THE TANK TO THE MOUTH OF THE CONTAINER, A CENTRALLY APERTURED INTURNED FLANGE AT THE OPPOSITE END OF THE TANK FROM THE EXTERNAL FLANGE, (B) A SLIDABLE VALVE STEM ARRANGED IN THE APERTURES AND BEING GUIDED BY THE EDGES THEREOF, THE VALVE STEM HAVING A PORTION EXTERIOR OF THE CAP, A PROJECTION ON THE VALVE STEM LOCATED WITHIN THE CAP, A SPRING BEARING AGAINST SAID PROJECTION TO NORMALLY URGE THE VALVE STEM OUTWARDLY RELATIVE TO THE CAP, (C) MEANS IN THE TANK FORMING A METERING CHAMBER AND INCLUDING A CYLINDRICAL MEMBER HAVING AN INTERNAL DIAMETER GREATER THAN THE DIAMETER OF THE STEM, THE STEM PASSING THROUGH SAID CYLINDRICAL MEMBER, (D) AND A GENERALLY TUBULAR SPRING FOLLOWER, SAID SPRING FOLLOWER INCLUDING AN OUTTURNED FLANGE AT ONE END THEREOF AND AN APERTURED INTURNED FLANGE AT THE OPPOSITE END THEREOF, SAID VALVE STEM BEING ALSO SLIDABLY RECEIVED IN THE APERTURE IN THE INTURNED SPRING FOLLOWER FLANGE INTERMEDIATE THE CAP AND THE INTURNED FLANGE OF THE TANK, SAID SPRING FINDING AN ABUTMENT FORMED BY SAID INTURNED FLANGE ON THE SPRING FOLLOWER, SAID CAP MAINTAINING SAID OUTTURNED FLANGE OF THE SPRING FOLLOWER IN FIXED RELATION RELATIVE TO THE TANK IN THE CONTAINER, (E) AND A DISCHARGE PORT AND A FILLING PORT IN SAID STEM, SAID FILLING PORT ONLY BEING IN COMMUNICATION WITH THE METERING CHAMBER WHEN THE VALVE STEM IS EXTENDED UNDER INFLUENCE OF THE SPRING, AND THE DISCHARGE PORT BEING IN COMMUNICATION WITH THE METERING CHAMBER TO THE EXCLUSION OF THE FILLING PORT WHEN THE STEM IS PRESSED RELATIVELY INWARDLY WITH RESPECT TO SAID TANK AND SAID SPRING FOLLOWER.