Arrangements including coaxial suction and delivery valves

Claim 1

IN COMBINATION WITH THE CYLINDER OF A FLUID COMPRESSING MACHINE OPERATING UNDER A HIGH PRESSURE, THE PROVISION OF A VALVE-CARRYING BODY FITTED FLUIDTIGHTLY INSIDE SAID CYLINDER AND PROVIDED WITH AN AXIAL DELIVERY CHANNEL SHOWING A SHOULDER FACING AWAY FROM THE CYLINDER AND WITH AN ANNULAR SERIES OF SUCTION CHANNELS EXTENDING OBLIQUELY ROUND THE AXIAL CHANNEL AND CONVERGING TOWARDS THE CYLINDER, A DELIVERY VALVE ADAPTED TO CLOSE THE END OF THE AXIAL CHANNEL FACING AWAY FROM THE CYLINDER, AN ANNULAR SUCTION VALVE ADAPTED TO MOVE AXIALLY OF THE BODY INTO AND OUT OF ENGAGEMENT WITH THE OPENINGS OF THE SUCTION CHANNELS FACING THE CYLINDER, A STROKE-LIMITING MEMBER FOR THE SUCTION VALVE ON THE SIDE OF THE LATTER FACING THE CYLINDER, AN ELEMENT FITTED INSIDE THE AXIAL CHANNEL OF THE BODY AND PROVIDED WITH A LONGITUDINAL PASSAGEWAY AND AN ABUTMENT RIGID WITH THE OUTER SURFACE OF SAID ELEMENT AT ITS END FACING AWAY FROM THE CYLINDER AND ENGAGING THE SHOULDER IN THE AXIAL CHANNEL, SAID ELEMENT MECHANICALLY ENGAGING THE STROKE-LIMITING MEMBER TO FORM A UNIT WITH THE LATTER, WITH THE BODY AND WITH THE SUCTION VALVE THEREBETWEEN, AND RESILIENT MEANS COOPERATING WITH SAID DELIVERY VALVE AND SAID SUCTION VALVE.