Small volume pump

Claim 1

A PUMP COMPRISING, A PAIR OF FLUID PRESSURE CHAMBERS, VALVE MEANS TIMED TO CHARGE AND VENT SAID PAIR OF FLUID PRESSURE CHAMBERS IN ALTERNATE SEQUENCE, A PAIR OF EXPANSIBLE BELLOWS, A DRIVEN CAM AND FOLLOWER ASSEMBLY FOR ACTUATING SAID PAIR OF EXPANSIBLE BELLOWS THROUGH A LIFT, DWELL, AND FALL CYCLE IN CONTINUOUS, ALTERNATE SEQUENCE WITH AN OVERLAP IN THE LIFT CYCLE, AN INLET LINE OPEN AT ONE END THEREOF TO A SOURCE OF LIQUID AND A DISCHARGE LINE OPEN AT ONE END THEREOF TO EACH OF SAID EXPANSIBLE BELLOWS, SAID INLET AND DISCHARGE LINES BEING ARRANGED TO PASS THROUGH SAID FLUID PRESSURE CHAMBERS IN MIXED RELATION SO THAT AN INLET INLET ASSOCIATED WITH ONE EXPANSIBLE BELLOWS AND A DISCHARGE LINE ASSOCIATED WITH THE OTHER EXPANSIBLE BELLOWS PASS THROUGH A RESPECTIVE FLUID PRESSURE CHAMBER, RESILIENT VALVE MEANS INTERPOSED IN EACH OF THE PORTIONS OF SAID INLET AND DISCHARGE LINES PASSING THROUGH SAID PAIR OF FLUID PRESSURE CHAMBERS, A MAIN DISCHARGE LINE INTO WHICH SAID DISCHARGE LINES OPEN, SAID TIMED VALVE MEANS BEING TIMED TO REVERSE THE CHARGING-VENTING SEQUENCE OF SAID PAIR OF FLUID PRESSURE CHAMBERS DURING THE OVERLAP OF THE LIFT CYCLE OF THE EXPANSIBLE BELLOWS TO OPEN AND CLOSE SAID RESILIENT VALVE MEANS WHEREBY THE DISPLACED LIQUID FROM EACH BELLOWS IS ALTERNATELY DISPLACED INTO SAID MAIN DISCHARGE LINE TO FORM ONE CONTINUOUS UNIFORM LIQUID MAINSTREAM.