Apparatus for adding a quantity of a liquid to another liquid

Claim 1

A DISPENSING DEVICE FOR ADDING A FIRST LIQUID TO A SECOND LIQUID WITHIN A CONTAINER, COMPRISING A RESERVOIR FOR SAID FIRST LIQUID, AND METERING MEANS COMMUNICATING BETWEEN SAID RESERVOIR AND SAID CONTAINER FOR INTERMITTENTLY ADDING A PREDETERMINED QUANTITY OF SAID FIRST LIQUID TO SAID CONTAINER, SAID METERING MEANS INCLUDING A PRESSURE CHAMBER PROVIDED WITH A FIRST COMPARTMENT ADAPTED ALTERNATELY TO BE CHARGED WITH SAID SECOND LIQUID, THEREBY FORMING AN AIR POCKET WITHIN SAID CHAMBER, AND TO BE FREED FROM SAID SECOND LIQUID, THEREBY ADMITTING ADDITIONAL AIR TO SAID CHAMBER; A SECOND COMPARTMENT PROVIDED WITH AT LEAST ONE LIQUID DISCHARGE APERTURE OPENING INTO SAID FIRST COMPARTMENT AND WITH AT LEAST ONE LIQUID INLET APERTURE OPENING INTO SAID RESERVOIR, SAID LIQUID DISCHARGE APERTURE BEING DISPOSED ABOVE SAID LIQUID INLET APERTURE, THEREBY FORMING A LIQUID SEAL WITHIN SAID SECOND COMPARTMENT BETWEEN SAID APERTURES UPON THE CHARGING OF SAID FIRST COMPARTMENT WITH SAID SECOND LIQUID FOR PREVENTING THE ENTRY OF SAID FIRST LIQUID INTO SAID FIRST COMPARTMENT AND FOR ADMITTING SAID PREDETERMINED QUANTITY OF SAID FIRST LIQUID TO SAID FIRST COMPARTMENT UPON A FREEING OF THE LATTER OF SAID SECOND LIQUID, SAID SECOND COMPARTMENT COMMUNICATING ABOVE THE LEVEL OF LIQUID THEREIN WITH SAID FIRST COMPARTMENT SUBSTANTIALLY ONLY THROUGH SAID LIQUIDDISCHARGE APERTURE WHEREBY SAID SECOND COMPARTMENT AND SAID APERTURES FORM SUBSTANTIALLY THE SOLE PATH OF FLOW OF SAID FIRST LIQUID INTO SAID SECOND LIQUID.