Cooling system for multi-unit rotary mechanisms

Claim 1

A LIQUID COOLING SYSTEM FOR THE OUTER BODY OF A ROTARY COMBUSTION ENGINE HAVING AT LEAST TWO UNITS WITH SAID OUTER BODY HAVING A FIRST PORTION EXPOSED TO RELATIVELY HIGH HEAT INPUT AND A CIRCUMFERENTIALLY-SPACED PORTION EXPOSED TO RELATIVELY LOW HEAT INPUT, SAID OUTER BODY INCLUDING A PAIR OF COAXIALLY-SPACED PERIPERAL WALLS, AN INTERMEDIATE WALL AND A PAIR OF COAXIALLY-SPACED END WALLS DISPOSED AT OPPOSITE ENDS OF THE OUTER BODY SUCH THAT EACH ENGINE UNIT INCLUDES ONES OF SAID PERIPHERAL WALLS AND ITS ADJACENT END WALL AND SUCH THAT SAID INTERMEDIATE WALL IS COMMON TO THE TWO ENGINE UNITS, SAID OUTER BODY HAVING FIRST AND SECOND LIQUID COOLANT PASSAGE SYSTEMS, ONE OF EACH OF THE ENGINE UNITS, EACH SAID PASSAGE SYSTEM INCLUDING A PLURALITY OF CIRCUMFERENTIALLY-SPACED BUT SERIALLY CONNECTED LIQUID COOLANT PASSAGE GROUPS EXTENDING FROM SAID INTERMEDIATE WALL THROUGH THE PERIPHERAL WALL OF ITS ENGINE UNIT TO ITS END WALL FOR FLOW OF LIQUID COOLANT BACK AND FORTH THROUGH EACH PERIPHERAL WALL BETWEEN SAID INTERMEDIATE WALL AND THE ASSOCIATED END WALL, INLET MEANS PROVIDED IN SAID INTERMEDIATE WALL FOR SUPPLYING LIQUID COOLANT TO THE INLET ENDS OF THE PASSAGES OF BOTH SAID PASSAGE SYSTEMS, AND OUTLET MEANS PROVIDED IN SAID INTERMEDIATE WALL FOR DISCHARGE OF SAID LIQUID COOLANT FROM THE OUTLET ENDS OF THE PASSAGES OF BOTH SAID PASSAGE SYSTEMS.