Liquid metering and dispensing system

Claim 1

A LIQUID METERING AND DISPENSING SYSTEM WHICH COMPRISES, A CYLINDER, A PISTON RECEIVED FOR MOVEMENT IN SAID CYLINDER, A NOZZLE ON SAID CYLINDER AT ONE SIDE OF SAID PISTON, PERMANENT RESILIENT MEANS FOR EXERTING FORCE ON THE OTHER SIDE OF SAID PISTON, SAID NOZZLE COMPRISING, A VALVE HAVING A CLOSED AND AN OPEN POSITION FOR RESPECTIVELY RESTRAINING AND PERMITTING PASSAGE OF LIQUID THROUGH SAID NOZZLE AND INTO AND OUT OF THE SPACE DEFINED BY SAID CYLINDER AND SAID ONE SIDE OF SAID PISTON, SAID PISTON BEING MOVEABLE UNDER SAID RESILIENT MEANS INTO A POSITION FOR EXHAUSTING SAID SPACE AND SAID VALVE BEING NORMALLY URGED TOWARDS ITS CLOSED POSITION; A SECOND NOZZLE FOR CO-OPERATION WITH SAID FIRST NOZZLE, MEANS FOR SUPPLYING LIQUID UNDER PRESSURE TO SAID SECOND NOZZLE, SAID FIRST AND SECOND NOZZLE OPERATIVELY CO-OPERATING UPON MUTUAL CONNECTION FOR ALLOWING LIQUID PASSAGE FROM SAID SECOND NOZZLE INTO SAID SPACE DEFINED BY THE CYLINDER AND ONE SIDE OF THE PISTON AND MOVEMENT OF SAID PISTON IN A DIRECTION AGAINST SAID RESILIENT MEANS, A STOP FOR LIMITING MOVEMENT OF SAID PISTON AND ACCURATELY DETERMINING THE MAXIMUM VOLUME OF LIQUID IN SAID SPACE, SAID LIQUID SUPPLIED TO SAID SECOND NOZZLE BEING PRESSURIZED FOR MOVING SAID PISTON TOWARDS SAID STOP FOR DEFINING CHOSEN VOLUME OF LIQUID IN SAID CYLINDER, AND OPERATING MEANS FOR MOVING SAID VALVE INTO ITS OPEN POSITION AND FOR DISCHARGING SAID CHOSEN VOLUME OF LIQUID FROM SAID CYLINDER UNDER FORCE FROM SAID RESILIENT MEANS AND EXHAUSTING SAID CYLINDER.