Metering pump

Claim 1

IN A PUMP MECHANISM, A CRANKCASE HAVING SIDE AND END WALLS, A DRIVE SLEEVE EXTENDED THROUGH ONE OF SAID SIDE WALLS AND HAVING AN INNER END POSITIONED IN SAID CRANKCASE AND AN OUTER END DISPOSED OUTSIDE SAID CRANKCASE, A RECIPROCAL ELEMENT EXTENDED THROUGH ONE OF SAID END WALLS FOR RECIPROCATION ALONG A PATH NORMAL TO SAID SLEEVE, ANTIFRICTION BEARINGS MOUNTED ON SAID ONE SIDE WALL AND CONSTITUTING THE SOLE SUPPORT FOR SAID SLEEVE SO THAT SAID SLEEVE IS ROTATABLE IN SAID BEARINGS ABOUT THE SLEEVE AXIS, A CONNECTING LINK HAVING A PAIR OF ENDS, MEANS ROTATABLY MOUNTING ONE END OF SAID CONNECTING LINK IN SAID CRANKCASE, SAID CONNECTING LINK BEING PIVOTALLY CONNECTED AT ITS OPPOSITE END TO SAID RECIPROCAL ELEMENT FOR RECIPROCATING SAID ELEMENT IN RESPONSE TO MOVEMENT OF SAID ONE END OF THE CONNECTING LINK IN A CIRCULAR PATH ABOUT SAID SLEEVE AXIS, SHAFT MEANS EXTENDING SUBSTANTIALLY AXIALLY THROUGH SAID SLEEVE, COACTING MEANS ON SAID SHAFT MEANS AND SAID SLEEVE DISPOSED IN SAID CRANKCASE AND OPERABLE UPON RELATIVE ROTATION OF SAID SLEEVE AND SHAFT MEANS TO ADJUST THE DIAMETER OF SAID CIRCULAR PATH, MEANS OUTSIDE SAID CRANKCASE SECURED TO SAID SHAFT MEANS FOR ADJUSTABLY CONNECTING SAID SHAFT MEANS AND SAID SLEEVE IN DIFFERENT RELATIVELY ROTATED POSITIONS, A DRIVE SPROCKET, ANTI-FRICTION BEARING MEANS ROTATABLY SUPPORTING SAID SPROCKET ON SAID SLEEVE, A CLUTCH COLLAR SLIDABLY MOUNTED ON SAID SLEEVE FOR AXIAL MOVEMENT RELATIVE THERETO TOWARD AND AWAY FROM SAID SPROCKET, SAID COLLAR BEING SECURED TO SAID SLEEVE SO THAT ROTATION OF SAID COLLAR CAUSES ROTATION OF SAID SLEEVE, AND ENGAGEABLE TOOTH MEANS ON SAID SPROCKET AND SAID COLLAR PROVIDING FOR DRIVING OF SAID COLLAR BY SAID SPROCKET IN ONE POSITION OF SAID COLLAR.