Pump construction

Claim 1

A DEVICE OF THE CHARACTER DESCRIBED COMPRISING TWO COAXIALLY ARRANGED TUBULAR CYLINDERS, CYLINDRICAL CLOSURE PLUGS FIXED IN THE REMOTE ENDS OF SAID CYLINDERS, A SINGLE ELONGATED CLOSURE PLUG COMMON TO THE TWO CYLINDERS HAVING ITS OPPOSITE ENDS FIXED IN THE ADJOINING ENDS THEREOF AND MAINTAINING THEIR COAXIAL RELATIONSHIP, SAID LAST MENTIONED PLUG HAVING AN AXIAL BORE, A ROD RECIPROCABLE THEREIN, PISTONS FIXED ON OPPOSITE ENDS OF SAID ROD HAVING A WORKING FIT IN THE RESPECTIVE CYLINDERS, ONE OF SAID CYLINDERS BEING A POWER CYLINDER, AND INLET AND EXHAUST VALVE MEANS CONNECTED WITH THE OPPOSITE ENDS OF SAID POWER CYLINDER TO CONTROL COMMUNICATION THERETO WITH A SOURCE OF DRIVE FLUID UNDER PRESSURE, WHEREBY THE PISTON IN THE POWER CYLINDER IS RECIPROCATED IN ORDER TO RECIPROCATE THE OTHER PISTON, THE OTHER CYLINDER BEING A PUMP CYLINDER AND HAVING PORTS PROVIDED IN THE OPPOSITE ENDS THEREOF ADAPTED TO BE PLACED IN COMMUNICATION WITH SUCTION AND DISCHARGE CONDUITS FOR THE PUMPING OF LIQUID AND SEMI-LIQUID MATERIALS, EACH OF THE THREE CLOSURE PLUGS BEING ADAPTED TO BE REMOVED AND REPLACED WHEREBY TO FACILITATE CLEANING OF THE CYLINDER, PLUGS, AND PISTONS, EACH PLUG FOR THIS PURPOSE HAVING AN ANNULAR GROOVE PROVIDED THEREIN INTERMEDIATE ITS ENDS RECEIVING AN O-RING OF COMPRESSIBLE RESILIENT MATERIAL ADAPTED TO BE COMPRESSED RADIALLY BETWEEN THE ANNULAR GROOVE AND THE WALL OF THE CYLINDER WHEN THE PLUG IS INSERTED THEREIN, AND MEANS FOR QUICKLY DETACHABLY SECURING EACH PLUG IN SAID CYLINDER, THE GROOVE AND O-RING BEING SPACED FROM THE INNER END OF THE PLUG IN RELATION TO THE CYLINDER, AND THE LAST MENTIONED MEANS BEING LOCATED BETWEEN SAID GROOVE AND THE OUTER END OF THE PLUG AND COMPRISING AN ANNULAR GROOVE PROVIDED IN THE PLUG AND PARALLEL HOLES PROVIDED IN THE CYLINDER IN DIAMETRICALLY OPPOSED RELATIONSHIP OPENING INTERMEDIATE THEIR ENDS TO THE INTERIOR OF THE CYLINDER AND ADAPTED TO BE PLACED IN REGISTER WITH DIAMETRICALLY OPPOSED PORTIONS OF SAID ANNULAR GROOVE, AND ELONGATED PINS INSERTED REMOVABLY IN SAID HOLES AND HAVING PORTIONS INTERMEDIATE THEIR ENDS PROJECTING INTO SAID ANNULAR GROOVE TO RETAIN THE PLUG AGAINST AXIAL DISPLACEMENT RELATIVE TO THE CYLINDER.

Claim 2

A DEVICE OF THE CHARACTER DESCRIBED COMPRISING TWO COAXIALLY ARRANGED TUBULAR CYLINDERS, CYLINDRICAL CLOSURE PLUGS FIXED IN THE REMOTE ENDS OF SAID CYLINDERS, A SINGLE ELONGATED CLOSURE PLUG COMMON TO THE TWO CYLINDERS HAVING ITS OPPOSITE ENDS FIXED IN THE ADJOINING ENDS THEREOF AND MAINTAINING THEIR COAXIAL RELATIONSHIP, SAID LAST MENTIONED PLUG HAVING AN AXIAL BORE, A ROD RECIPROCABLE THEREIN, PISTONS FIXED ON OPPOSITE ENDS OF SAID ROD HAVING A WORKING FIT IN THE RESPECTIVE CYLINDERS, ONE OF SAID CYLINDERS BEING A POWER CYLINDER, AND INLET AND EXHAUST VALVE MEANS CONNECTED WITH THE OPPOSITE ENDS OF SAID POWER CYLINDER TO CONTROL COMMUNICATION THERETO WITH A SOURCE OF DRIVE FLUID UNDER PRESSURE, WHEREBY THE PISTON IN THE POWER CYLINDER IS RECIPROCATED IN ORDER TO RECIPROCATE THE OTHER PISTON, THE OTHER CYLINDER BEING A PUMP CYLINDER AND HAVING PORTS PROVIDED IN THE OPPOSITE ENDS THEREOF ADAPTED TO BE PLACED IN COMMUNICATION WITH SUCTION AND DISCHARGE CONDUITS FOR THE PUMPING OF LIQUID AND SEMI-LIQUID MATERIALS, EACH OF THE THREE CLOSURE PLUGS BEING ADAPTED TO BE REMOVED AND REPLACED WHEREBY TO FACILITATE CLEANING OF THE CYLINDER, PLUGS, AND PISTONS, EACH PLUG FOR THIS PURPOSE HAVING AN ANNULAR GROOVE PROVIDED THEREIN INTERMEDIATE ITS ENDS RECEIVING AN O-RING OF COMPRESSIBLE RESILIENT MATERIAL ADAPTED TO BE COMPRESSED RADIALLY BETWEEN THE ANNULAR GROOVE AND THE WALL OF THE CYLINDER WHEN THE PLUG IS INSERTED THEREIN, AND MEANS FOR QUICKLY DETACHABLY SECURING EACH PLUG IN SAID CYLINDER, THE GROOVE AND O-RING BEING SPACED FROM THE INNER END OF THE PLUG IN RELATION TO THE CYLINDER, AND THE LAST MENTIONED MEANS BEING LOCATED BETWEEN SAID GROOVE AND THE OUTER END OF THE PLUG AND COMPRISING AN ANNULAR GROOVE PROVIDED IN THE PLUG AND PARALLEL HOLES PROVIDED IN THE CYLINDER IN DIAMETRICALLY OPPOSED RELATIONSHIP OPENING INTERMEDIATE THEIR ENDS TO THE INTERIOR OF THE CYLINDER AND ADAPTED TO BE PLACED IN REGISTER WITH DIAMETRICALLY OPPOSED PORTIONS OF SAID ANNULAR GROOVE, AND ELONGATED PINS INSERTED REMOVABLY IN SAID HOLES AND HAVING PORTIONS INTERMEDIATE THEIR ENDS PROJECTING INTO SAID ANNULAR GROOVE TO RETAIN THE PLUG AGAINST AXIAL DISPLACEMENT RELATIVE TO THE CYLINDER.