Quantitative jetting means for a pressured injector-reservoir

Claim 1

A QUANTITATIVE JETTING MEANS FOR A PRESSURIZED INJECTORRESERVOIR, COMPRISING A RESERVOIR ADAPTED TO CONTAIN A PRESSURED FLUID AND CLOSED FLUID-TIGHTLY BY A LID, A QUANTITATIVE CHAMBER FORMED IN THE CENTRAL PART OF AND DOWNWARDS PROTRUDED FROM SAID LID, A DEFORMABLE SEMI-SPHERICAL MEMBER MADE OF AN ELASTIC MATERIAL, PLACED ON A SINGLE AND OPENED BOTTOM OF SAID QUANTITATIVE CHAMBER AND PROVIDED WITH A CENTRAL PERFORATION FOR COMMUNICATING THE INTERIOR OF SAID QUANTITATIVE CHAMBER WITH SAID RESERVOIR THROUGH A SUCTION PIPE, AND A JETTING MEMBER FIXED ON A TUBULAR VALVE ROD HAVING A BOTTOM END ADAPTED TO MOVE VERTICALLY INSIDE SAID QUANTITATIVE CHAMBER, SAID TUBULAR VALVE ROD BEING ADAPTED TO BE HELD BY SAID LID FLUID-TIGHTLY AND TO COMMUNICATE SAID INTERIOR OF SAID QUANTITATIVE CHAMBER WITH THE ATMOSPHERE THROUGH SAID TUBULAR VALVE ROD AND SAID JETTING MEMBER WHEN SAID TUBULAR VALVE ROD IS LOWERED IN SAID QUANTITATIVE CHAMBER, AND SAID PERFORATION BEING ADAPTED TO BE CLOSED, AT THE SAME TIME, BY SAID BOTTOM END OF SAID LOWERED TUBULAR VALVE ROD SO AS TO MAKE THE QUANTITATIVE CHAMBER INCOMMUNICABLE FROM SAID RESERVOIR.