Volumetric dispensing apparatus

Claim 1

APPARATUS COMPRISING AN INLET CONDUIT ADAPTED FOR THE SUPPLY OF FLUID, A CHAMBER PROXIMATE SAID INLET CONDUIT, SAID CHAMBER BEING IN THE FORM OF A TUBE HAVING A BORE OF PREDETERMINED SIZE AND HAVING TWO OPPOSITELY DISPOSED ENDS, SCALE MEANS OPERATIVELY ASSOCIATED WITH SAID CHAMBER INTERMEDIATE SAID ENDS, A FIRST CAP MEMBER ON ONE END OF SAID TUBE AND SEALING THE SAME, A FREE PISTON IN SAID TUBE AND HAVING A SIZE CORRESPONDING TO THAT OF SAID BORE, SAID PISTON BEING SLIDABLE IN SAID BORE AND DIVIDING SAID CHAMBER INTO TWO SECTIONS IN SUBSTANTIALLY FLUID-TIGHT MANNER ADJUSTMENT, MEANS ON AND SEALING THE OTHER END OF SAID TUBE AND INCLUDING A STOP WITHIN SAID CHAMBER AND ADJUSTABLE RELATIVE TO SAID SCALE MEANS, AN OUTLET CONDUIT, TWO FURTHER CONDUITS COUPLED TO SAID TUBE PROXIMATE THE ENDS OF THE SAME, AND MEANS TO COUPLE SAID INLET CONDUIT SELECTIVELY TO ONE OF SAID FURTHER CONDUITS AND THUS TO ONE END OF SAID TUBE WHILE COUPLING THE OTHER FURTHER CONDUIT TO SAID OUTLET CONDUIT; SAID ADJUSTMENT MEANS FURTHER INCLUDING A ROD SUPPORTING SAID STOP AND EXTENDING OUTSIDE SAID CHAMBER, AN ADJUSTMENT MEMBER SLIDABLY SUPPORTING SAID ROD FOR COARSE ADJUSTMENT, A LOCKING MEMBER FOR LOCKING SAID ROD TO SAID ADJUSTMENT MEMBER, AND A CAP MEMBER ON THE SAID OTHER END OF SAID TUBE AND THREADABLY SUPPORTING THE ADJUSTMENT MEMBER FOR FINE ADJUSTMENT OF SAID ROD.