Measuring device for hazardous liquids

Claim 1

IN A MEASURING DEVICE OF THE CHARACTER DESCRIBED, (A) A SINGLE PIECE BODY SUB-ASSEMBLY HAVING (1) A BOTTOM SKIRT, AND (2) CO-AXIAL SMALLER PROJECTIONS FORMING AN ANNULAR VALVE SEAT, (B) A GENERALLY FRUSTO CONICAL SINGLE PIECE MEASURING CHAMBER SUB-ASSEMBLY HAVING (1) A FLANGE AT ITS LARGER DIAMETER END, AND (2) MEANS FORMING AN INTERNAL TAPERED VALVE SEAT AT ITS SMALLER DIAMETER, (C) MEANS SECURING SAID SKIRT AND FLANGE TOGETHER TO FORM A MIXING CHAMBER DEFINED BY SAID BODY AND MEASURING CHAMBER SUB-ASSEMBLIES, (D) A VALVE STEM SUB-ASSEMBLY RECIPROCABLE WITHIN THE BODY AND HAVING (1) A TAPERED VALVE ENGAGEABLE AGAINST SAID TAPERED VALVE SEAT, (2) A DISC VALVE ENGAGEABLE AGAINST SAID ANNULAR VALVE SEAT, AND (3) SAID VALVES BEING SPACED TO CLOSE ONE AS THE OTHER OPENS, (E) MEANS PROVIDING A PASSAGEWAY THROUGH SAID BODY WITH ONE END ADAPTED FOR COMMUNICATION WITH A SOURCE OF LIQUID AND ONE END COMMUNICATING WITH THE MEASURING CHAMBER WITHIN SAID ANNULAR VALVE SEAT.