Internal combustion engine

Claim 1

AN INTERNAL COMBUSTION ENGINE COMPRISING: A HOUSING; A SHAFT ROTATABLY MOUNTED IN SAID HOUSING; A TOROIDAL CYLINDER WITHIN SAID HOUSING AND ENCIRCLING SAID SHAFT; OPPOSING PAIRS OF ARCUATE PISTONS MOUNTED WITHIN SAID CYLINDER FOR OSCILLATORY MOVEMENT; A PAIR OF SIMILAR, GENERALLY ANNULAR MEMBERS, EACH ENGAGING ONE OF EACH PAIR OF PISTONS TO OSCILLATE THEREWITH ABOUT SAID SHAFT; CLUTCH MEANS PROVIDING DRIVING CONNECTION BETWEEN SAID MEMBERS AND SAID SHAFT WHILE THE MEMBERS ARE INDIVIDUALLY MOVING IN THE DIRECTION SAID SHAFT IS TO BE DRIVEN; SAID MEMBERS BEING IN CONFRONTING RELATION AND HAVING CORRESPONDING RING GEAR TEETH ON DIAMETRICALLY OPPOSED PORTIONS OF THE CONFRONTING FACES THEREOF; A PAIR OF PINIONS MOUNTED FOR FREE ROTATION ON FIXED JOURNALS ON OPPOSITE SIDES OF SAID SHAFT AND IN CONSTANT MESH WITH SAID TEETH AND INTERCONNECTING SAID MEMBERS FOR EQUAL AND OPPOSITE MOVEMENT THEREOF; AND FUEL INLETS AND EXHAUST OUTLETS FOR SAID CYLINDER ADJACENT THE POSITIONS OF THE ENDS OF THE PISTONS AT THEIR LIMITS OF TRAVEL; AND MEANS FOR INJECTING FUEL BETWEEN EACH APPROACHING PAIR OF PISTONS, SUCH THAT EACH OSCILLATION OF THE PISTONS INCLUDES TWO FIRING STROKES.