Crankshaft for multi-stage rotary piston engine

Claim 1

A CRANKSHAFT FOR A MULTI-STAGE ROTARY PISTON-TYPE INTERNAL COMBUSTION ENGINE IN WHICH EACH STAGE HAS AN ANNULAR CENTER CASING AND SIDE WALLS CLOSING THE CENTER CASING AND DEFINING A COMBUSTION CHAMBER THEREIN, A POLYGONALLY SHAPED ROTARY PISTON ROTATABLY POSITIONED WITHIN EACH COMBUSTION CHAMBER, AND INTAKE, EXHAUST AND FIRING MEANS FOR EACH COMBUSTION CHAMBER, THE STAGES BEING IN SIDE-BY-SIDE ABUTTING POSITION, SAID CRANKSHAFT COMPRISING A PLURALITY OF ALIGNED, JOINED SECTIONS, ONE FOR EACH STAGE, AN ECCENTRICALLY POSITIONED CRANK PIN ON EACH STAGE ADAPTED TO BE ROTATABLY POSITIONED WITHIN THE PISTON, AND A PLURALITY OF CROWN GEAR TEETH ON THE ENDS OF SAID SECTIONS ENGAGED WITH THE TEETH ON THE NEXT ADJACENT SECTIONS FORMING A COUPLING BETWEEN THE ADJACENT CRANKSHAFT SECTIONS, AND A SINGLE CYLINDRICAL CRANKSHAFT BUSHING AROUND EACH COUPLING BETWEEN CRANKSHAFT SECTIONS, SAID BUSHING BEING AS LONG AS THE DISTANCE BETWEEN THE COMBUSTION CHAMBERS OF THE ADJACENT STAGES OF THE ENGINE, EACH CRANKSHAFT SECTION HAVING A LONGITUDINAL AXIAL BORE THERETHROUGH, AND A BOLT EXTENDING THROUGH THE ALIGNED BORES IN THE CRANKSHAFT SECTIONS SECURING THE SECTIONS TO EACH OTHER IN THE AXIAL DIRECTION.