Abstract: The rotary piston engine 10 has a stationary central core 12 having a primary axis and radially offset inlet and combustion sections, the cylinder rows and their pistons rotating about the offset inlet and combustion sections, and the outer housing 18 rotating concentrically about the primary axis of the core 12. The cylinder rows are linked to the outer housing 18 to provide a 1:1 rotational correspondence, despite the different rotational axes of the cylinder rows and outer housing 18. The pistons are connected to the concentrically rotating outer housing 18 by connecting rods, thus moving inwardly and outwardly in their cylinders as their cylinder rows rotate about the radially offset inlet and combustion sections of the core 12. The engine 10 is devoid of complex valve mechanisms due to the rotary valve effect provided by the rotation of the cylinder rows around the stationary core 12.

Abstract: A rotary internal combustion engine which has a rotating drum supported in a stationary housing is disclosed. The rotating drum has one bank of cylinders for taking in and compressing the fuel/air mixture and another bank of cylinders for generating power and exhausting the combustion products. The compressed fuel/air mixture passes through a combustion chamber, where it is ignited, before entering the power generating cylinders. The combustion chamber is fixed to the stationary outer housing. The piston rods connecting the pistons to an eccentric shaft are pivotally articulated at both of each piston rod's ends. Because of the geometry of the drum, pistons, connecting rods, and the eccentric shaft, high pressure combustion products power the rotation of the drum. A power output shaft is rigidly fixed to the drum and allows the engine of the present invention to drive other equipment.