US Patent 7621254 Internal combustion engine with toroidal cylinders

The instant invention provides a torodial internal combustion engine with lengthened pistons that move through three perpendicularly intersecting torodial cylinders. The engine includes one central power ring and a pair of charge rings which intersect opposite quadrants of the power ring at right angles to supply a fuel/air mixture to the power ring for combustion. The charge rotors are connected to the power rotor, through a gear-train, so that all of the rotors rotate at the same rate. The fuel/air mixture is combusted within a combustion chamber formed entirely within the power ring.