Heat exchanger

Claim 1

IN COMBINATION, AN INTERNAL COMBUSTION ENGINE, A FLUID PUMP, MEANS FOR DRIVING THE PUMP FROM THE ENGINE, CONDUIT MEANS CARRYING FLUID BEING PUMPED, SAID ENGINE HAVING PASSAGES FOR COOLING LIQUID, INLET AND OUTLET MEANS FOR SAID PASSAGES, SAID LIQUID PASSING IN HEAT EXCHANGE RELATION WITH SAID ENGINE IN ORDER TO MAINTAIN ITS TEMPERATURE WITHIN PERMISSIBLE LIMITS, AND HEAT EXCHANGE MEANS FOR REMOVING HEAT FROM SAID LIQUID AFTER ITS PASSAGE THROUGH SAID ENGINE AND FOR RECIRCULATING IT BACK TO SAID ENGINE, SAID HEAT EXCHANGE MEANS COMPRISING A PAIR OF SPACED SUBSTANTIALLY PARALLEL PIPES, SAID PIPES CONNECTED BY A PLURALITY OF S-SHAPED TUBES, AN END OF EACH TUBE CONNECTED TO A SUBSTANTIALLY OPPOSITELY DISPOSED PORION OF A PIPE, THE NETWORK OF PIPES AND TUBES FITTING WITHIN THE CONDUIT MEANS AND HAVING AN OVER-ALL DIAMETER SUBSTANTIALLY FILLING THE INTERIOR OF THE CONDUIT MEANS, SAID PIPES HAVING A PAIR OF THEIR OPPOSITELY DISPOSED ENDS CLOSED, CONNECTING MEANS EXTENDING FROM THE OTHER OPPOSITELY DISPOSED MEANS, CONDUIT COUPLING MEANS, SAID COUPLING MEANS HAVING A SHORT CONDUIT PORTION AND MEANS FOR ATTACHING CONDUITS ONTO THE ENDS THEREOF, SAID CONNECTING MEANS OF SAID PIPE EXTENDING THROUGH SAID SHORT CONDUIT PORTION, AND MEANS CONNECTING SAID CONNECTING MEANS TO THE INLET AND OUTLET MEANS FOR SAID ENGINE.