Liquid-dispensing apparatus

Claim 1

DISPENSING APPARATUS FOR LIQUIDS COMPRISING IN COMBINATION A MANUALLY DEFORMABLE AIR-TIGHT CONTAINER ADAPTED TO STORE LIQUID AND HAVING LIQUID EXIT MEANS IN ONE PORTION THEREOF, A DISPENSING CAP MOUNTED ON THE CONTAINER OVER SAID EXIT MEANS, SAID CAP HAVING A HOLLOW INTERIOR PORTION ADAPTED TO RECEIVE LIQUID AND MARKED TO INDICATE AT LEAST ONE LEVEL THEREIN REPRESENTING A PREDETERMINED QUANTITY OF LIQUID CONTENTS, SAID CAP BEING FORMED TO DEFINE A RESTRICTED AIR-TIGHT LIQUID PASSAGE BETWEEN SAID INTERIOR PORTION AND THE EXIT MEANS OF SAID CONTAINER, WHEREBY MANUAL COMPRESSIVE PRESSURE ON SAID CONTAINER WILL FORCE LIQUID FROM SAID CONTAINER INTO THE LOWER PART OF SAID CAP INTERIOR, AND A VALVE LOCATED IN SAID RESTRICTED LIQUID PASSAGE, SAID VALVE UNSEATING WHEN LIQUID IS FORCED THROUGH SAID PASSAGE DUE TO COMPRESSIVE PRESSURE ON SAID CONTAINER BUT SEATING WHEN PRESSURE ON SAID CONTAINER IS RELIEVED, SAID VALVE BEING PROVIDED WITH A SMALL OPENING OPERATIVE WHEN THE VALVE IS SEATED TO PERMIT VERY SLOW BACK-FLOW FROM SAID CAP INTERIOR INTO SAID CONTAINER.