Pumps

Claim 1

A PUMP COMPRISING A SUPPORT PROVIDED WITH A LONNGITUDINNAL BORE AND A TRANSVERSE CHANNEL INTO A MEDIAL POINT OF WHICH THE LONGITUDINAL BORE OPENSS, A CYLINDDEER FITTED IN TTHE LONGITUDINAL BORE AND ENCLOSING A CHAMBEER OPENING THROUGH A BORE INTO THE END OF THE CYLINDER FACING THE TRANSVERSE CHANNEL, A LIQUID-OPERATING MMEMBER RECIPROCATINGLY CARRIED INSIDE THE CYLINDER CHAMBER, A SUCTION PIPE AND A DELIVEY PIPE THE COAXIAL ENDS OF WHICH ARE RIGIDLY SECURED TO THE SUPPORT AND OPEN INTO THE CORRESPONDING OUTER ENDS OF THE TRANSVERSE CHANNEL, COAXIAL LINES OF FLUIDTIGHTLY INTERCONNECTED TUBULAR VALVE BOXES FITTED IN ALIGNMENT WITH SAID PIPE ENDS INSIDE THE TRANSVERSE CHANNEL, EACH TO OPEN SIDE OF ITS MEDIAL POINT, SUCTION AND DELIVERY VALVES IN THE VALVE BOXES OF THELINE EXTENDING BETWEEN THE MEDIAL POINT ANND THE CORRESPONDING PIPES, A CONNECTION SLIDINGLY FITTED OVER THE END OIF EACH PIPE FACING THE CORRESPONDING LINE OF VALVE BOXES. AND MEANS ADAPTED TO SHIFT EACH CONNECTION OVER THE ENND OF THE COOPERATING PIPE TO SECURE IT SELECTIVELY IN AN OPERATIVE POSITION ENSURING A FLUIDTIGHT CONNECCTION BETWEEN SAID PIPE END AND THE COOPERATING VALVE BOX LINE AND AN INOPERATIVE POSITION FOR WHICH THE CONNECTION IS COLLAPSED OVER THE CORRESPONDING PIPE END AND RELEASES THE COOPERATING LINE OF VALVE BOXES.