Patent ID: 6349679
Filing Date: 2002-02-26
Classification: F01C,F01L,F02B

Abstract:
A circularly-curved piston engine comprising:a plurality of circularly-curved cylinders each assuming a circular shape in cross section; a plurality of circularly-curved cylindrical pistons each fitting and reciprocating within each of said cylinders; a rotor carrying said pistons to keep the pistons in balance and rockable about a center of said rotor along orbits relative to said cylinders, wherein said rotor is provided with a pair of connecting rods to impart half a rocking power of said rotor to each of a pair of crank shafts each of which converts the half of said rocking power to a piece or torque on an axis of rotation; a gear mechanism for receiving a pair of said pieces of torque to combine them into an output power; an output shaft connected with said gear mechanism for receiving and out-putting said output power; said rotor being provided with a dovetail groove; said piston being provided with a rotor-mounted end portion assuming a wedge shape, and has said rotor-mounted end portion inserted in said dovetail groove of said rotor, a pair of said pistons being diametrically opposed to each other with respect to the center of said rotor; said rotor-mounted end portion assuming said wedge shape of said piston being provided with a circularly-curved wall portion; and a compression ring being disposed radially inwardly between said circularly-curved wall portions of said pair of said pistons to urge said wall portions radially outwardly.