Pumps

Claim 2

A PUMP FOR PUMPING LIQUIDS COMPRISING AN INJECTOR HAVING A VENTURI CHAMBER, AN INLET TO THE CHAMBER AT ONE END OF THE VENTURI AND AN OUTLET AT THE OTHER END OF THE VENTURI, A PIPE LEADING FROM THE OUTLET TO WHERE THE LIQUID IS TO BE PUMPED, A HIGH VELOCITY NOZZLE IN THE CHAMBER HAVING ITS TIP EXTENDING INTO THE INLET END OF THE VENTURI, THE AFORESAID INJECTOR BEING TOTALLY SUBMERGED IN THE LIQUID TO BE PUMPED, SO THAT SAID LIQUID FLOODS THE INJECTOR THROUGH THE INLET, A CONDUIT CONNECTED AT ONE END TO THE NOZZLE INLET, AND EXTENDING ABOVE THE SURFACE OF THE LIQUID, A PISTON AND CYLINDER MEANS ABOVE THE LIQUID SURFACE CONNECTED TO THE OTHER END OF THE CONDUIT, SO THAT THE LIQUID WILL FILL PART OF THE CONDUIT FROM THE NOZZLE END, THE REMAINING PART BETWEEN THE LIQUID IN THE CONDUIT AND THE CYLINDER DEFINING A GAS POCKET, THE PISTON AND CYLINDER MEANS BEING OPERABLE TO APPLY A RAPIDLY PULSATING PRESSURE TO THE SURFACE OF THE LIQUID IN THE CONDUIT TO CAUSE IT TO OSCILLATE BETWEEN A HIGH AND LOW POSITION IN THE CONDUIT THEREBY PUMPING THE LIQUID THROUGH THE OUTLET PIPE.

Claim 3

MULTISTAGE CONTINUOUS LIQUID-LIQUID CONTACTING APPARATUS COMPRISING A VESSEL HAVING TWO PARTITIONS DIVIDING IT INTO THREE SUB-COLUMNS TO CONTAIN A DISPERSED LIQUID PHASE AND A CONTINUOUS LIQUID PHASE AT SUBSTANTIALLY THE SAME LEVELS, THE DISPERSED PHASE BEING OF A LESSER DENSITY THAN THE CONTINUOUS PHASE, AN INLET FOR THE DISPERSED PHASE AND AN OUTLET FOR THE CONTINUOUS PHASE BOTH LOCATED NEAR THE BOTTOM OF THE FIRST SUBCOLUMN IN COMMUNICATION WITH THE CONTINUOUS PHASE, A FIRST PUMP AS CLAIMED IN CLAIM 1 LOCATED NEAR THE BOTTOM OF THE FIRST SUBCOLUMN HAVING AN INLET PIPE LEADING FROM THE DISPERSED PHASE IN THE FIRST SUBCOLUMN AND AN OUTLET PIPE COMMUNICATING WITH THE CONTINUOUS PHASE IN THE SECOND INTERMEDIATE SUBCOLUMN NEAR THE BOTTOM THEREOF, A SECOND PUMP AS CLAIMED IN CLAIM 1 SUBMERGED IN THE CONTINUOUS PHASE NEAR THE BOTTOM OF THE SECOND SUBCOLUMN HAVING AN OUTLET PIPE LEADING TO THE CONTINUOUS PHASE IN THE FIRST SUBCOLUMN JUST BELOW THE INTERFACE OF THE TWO PHASES, A THIRD PUMP AS CLAIMED IN CLAIM 1 LOCATED IN THE SECOND SUBCOLUMN NEAR THE BOTTOM THEREOF HAVING AN INLET PIPE LEADING FROM THE DISPERSED PHASE AT THE TOP OF THE SECOND SUBCOLUMN AND AN OUTLET PIPE COMMUNICATING WITH THE CONTINUOUS PHASE IN THE THIRD SUBCOLUMN NEAR THE BOTTOM THEREOF, A FOURTH PUMP AS CLAIMED IN CLAIM 1 SUBMERGED IN THE CONTINUOUS PHASE NEAR THE BOTTOM OF THE THIRD SUBCOLUMN HAVING AN OUTLET PIPE LEADING TO THE CONTINUOUS PHASE IN THE SECOND SUBCOLUMN JUST BELOW THE INTERFACE BETWEEN THE TWO PHASES, AN OUTLET FOR THE DISPERSED PHASE AND AN INLET FOR THE CONTINUOUS PHASE BOTH LOCATED IN THE THIRD SUBCOLUMN, A SINGLE PISTON AND CYLINDER MEANS REPLACING THE SEPARATE PISTON AND CYLINDER MEANS OF EACH PUMP, THE CONDUITS LEADING TO THE NOZZLES OF EACH OF THE PUMPS BEING CONNECTED TO THE SINGLE PISTON AND CYLINDER MEANS SO THAT THE PULSATING PRESSURE IS DISTRIBUTED TO ALL THE COLUMN SIMULTANEOUSLY AND THE HIGH AND LOW POSITIONS IN SAID CONDUITS ARE A LEVEL BETWEEN THE INTERFACE AND UPPERMOST SURFACE OF THE LIQUIDS AND A LEVEL JUST ABOVE THE NOZZLE RESPECTIVELY.