Device with positive displacement valve unit

Claim 1

A DEVICE FOR METERING PREDETERMINED AMOUNTS OF UNIFORM COMPONENTS OF A FLOWING MIXTURE COMPRISING A CASING, A RESERVOIR IN SAID CASING, A METERING CHAMBER COMMUNICATING WITH AND IN THE LOWER SECTION OF SAID CASING, VALVE SEATS DISPOSED ON OPPOSITE ENDS OF SAID METERING CHAMBER, VALVE MEANS RECIPROCAL IN SAID CASING INCLUDING UPPER AND LOWER VALVE PLUGS ASSOCIATED RESPECTIVELY WITH SAID SEATS AND DISPOSED IN A PREDETERMINED FIXED RELATION WITH EACH OTHER, SUCH THAT THE DISTANCE BETWEEN THEM IS GREATER THAN THE DISTANCE BETWEEN SAID SEATS, SAID VALVE MEANS AND SAID METERING CHAMBER TOGETHER DEFINING A PREDETERMINED FIXED VOLUME, MEANS FOR RECIPROCATING SAID VALVE MEANS FOR ALTERNATELY SEATING SAID VALVE PLUGS ON THEIR RESPECTIVE SEATS, WHEREBY COMMUNICATION BETWEEN SAID METERING CHAMBER AND SAID RESERVOIR IS ALTERNATELY EFFECTED AND PREVENTED, AND THE METERING CHAMBER MAY CONSEQUENTLY BE FILLED AND EMPTIED, AN INLET PORT FOR SAID FLOWING MIXTURE COMMUNICATING WITH SAID RESERVOIR AND DISPOSED LATERALLY OF THE UPPERMOST POSITION OF SAID UPPER VALVE PLUG, SAID INLET PORT AND SAID UPPER VALVE PLUG COOPERATING WHEN THE LATTER IS IN ITS UPPERMOST POSITION TO CAUSE A PORTION OF THE INFLOWING MIXTURE TO FILL SAID METERING CHAMBER AND TO IMPART ADDITIONAL TURBULENCE TO THE MIXTURE IN SAID METERING CHAMBER TO FURTHER ASSURE UNIFORMITY OF COMPOSITION OF THE MIXTURE, AND AN OUTLET PORT FOR SAID MIXTURE COMMUNICATING WITH SAID RESERVOIR AND DISPOSED ABOVE SAID INLET PORT.