Regulation devices for free piston internal combustion engines

Claim 1

IN COMBINATION, AN INTERNAL COMBUSTION ENGINE COMPRISING A CYLINDER AND A PISTON FREELY SLIABLE IN SAID CYLINDER SO AS TO FORM THEREWITH TWO VARIABLE VOLUME CHAMBERS LOCATED RESPECTIVELY ON EITHER SIDE OF SAID PISTON, TWO RODS RIGID WITH SAID PISTON AND COAXIAL THEREWITH ON EITHER SIDE THEREOF, RESPECTIVELY, SAID RODS EXTENDING THROUGH THE RESPECTIVE ENDS OF SAID CYLINDER, A CYLINDRICAL STRUCTURE RIGID WITH SAID CYLINDER ADAPTED TO ACCOMMODATE EACH OF SAID RODS, SLIDABLE IN SAID STRUCTURE, SAID STRUCTURE BEING FILLED WITH A LIQUID, EACH OF SAID STRUCTURE FORMING, AT THE OUTER END THEREOF A CYLINDRICAL BLIND HOLE IN LINE WITH THE CORRESPONDING ROD AND ADAPTED TO ACCOMMODATE IT WITH A SLIDING FIT, SAID BLIND HOLES BEING SO POSITIONED THAT EACH OF SAID RODS ENGAGES THEREINTO ONLY WHEN THE OUTER DEAD CENTER OF SAID PISTON IS BEYOND A PREDETERMINED POSITION, REGULATABLE MEANS FOR FEEDING FUEL INTO SAID CYLINDER IN RESPONSE TO THE RECIPROCATING MOVEMENTS OF SAID PISTON WITH RESPECT TO SAID CYLINDER, AND MEANS RESPONSIVE TO OVERPRESSURE PRODUCED IN SAID BLIND HOLE WHEN SAID RODS ENGAGE THEREINTO, FOR OPERATING SAID REGULATABLE FUEL FEED MEANS TO REDUCE THE RATE OF FUEL FEED ENSURED BY SAID LAST MENTIONED MEANS.