Control valve with adjustable flow rate, especially for dispensing machines

Claim 1

A CONTROL VALVE WHICH INCLUDES: A BLOCK HAVING A BORE THERETHROUGH, A FLEXIBLE PINCHABLE ELASTIC TUBE EXTENDING THROUGH SAID BORE, SAID BLOCK HAVING AN OPENING PROVIDED AT ONE SIDE OF SAID BLOCK AND INTERSECTING SAID BORE, PINCHING LEVER MEANS PIVOTED TO SAID BLOCK AND HAVING A FIRST PORTION THEREOF EXTENDING THROUGH SAID OPENING AND BEING ENGAGEABLE WITH SAID TUBE, SAID FIRST PORTION BEING MOVABLE BETWEEN A POSITION IN WHICH SAID TUBE IS COLLAPSED AND ARRESTS FLOW THERETHROUGH AND A POSITION IN WHICH SAID FIRST PORTION IS COMPLETELY DISENGAGED FROM SAID TUBE, SPRING MEANS CONTINUOUSLY URGING SAID FIRST PORTION OF SAID LEVER MEANS TO PINCH SAID TUBE SUBSTANTIALLY CLOSED, SOLENOID MEANS SLIDABLY MOUNTED ON SAID BLOCK ALONG THE PLANE OF THE PIVOTAL MOVEMENT OF SAID LEVER MEANS, SAID SOLENOID MEANS INCLUDING ARMATURE MEANS PIVOTALLY CONNECTED TO A SECOND PORTION OF SAID LEVER MEANS AND OPERABLE WHEN ENERGIZED AGAINST THE THRUST OF SAID SPRING MEANS TO REDUCE THE PINCHING OF SAID TUBE FROM A PINCHED CLOSED CONDITION TO A DESIRED AND VARIABLE PARTIALLY OPEN CONDITION, AND ADJUSTABLE SETTING MEANS ARRANGED IN SAID BLOCK OUTSIDE THE PATH OF SAID TUBE AND OPERABLE FROM THE OUTSIDE OF SAID BLOCK FOR PREVENTING SLIDING MOVEMENT OF SAID SOLENOID MEANS ON SAID BLOCK TOWARD SAID OPENING BEYOND A DESIRED SET LIMIT WHILE PROVIDING FOR SLIDING OF SAID SOLENOID MEANS MANUALLY ON SAID BLOCK AWAY FROM SAID OPENING IN THE DIRECTION OF ARMATURE MOVEMENT EFFECTING OPENING OF SAID TUBE BY A DISTANCE SUFFICIENT TO CAUSE SAID FIRST PORTION OF SAID LEVER MEANS TO COMPLETELY DISENGAGE SAID TUBE.