Rotary engine with pistons and lenticular valves

A machine with rotating lenticular pistons and valves for internal and external combustion engines, expansion motors and pumps, comprising a flat central stator housing with two lateral cover housings, a plurality of rotating elements enclosing the interior of said stator housing and rotating on stationary parallel shafts pivoted on bearings inside said cover housings, gear train means connecting said parallel shafts for producing rotation of said parallel shafts in one direction and at the same angular speed, said central stator housing containing in its interior and throughout its entire thickness, a cylindrical central cavity coaxially intersected by a plurality of cylindrical smaller equidistant surfaces distributed around its periphery and rotating inside said central cylindrical cavity, a rotor-piston with lenticular cross-section, a plurality of rotor-valves also of lenticular cross-section and surrounding said rotor-piston, said rotor valves rotating and making contact with said smaller cylindrical surfaces, said cylindrical equidistant surfaces contacting said cavity by said rotor-piston, said rotor-valves having seal means shaped in correspondence to the profiles of the lenticular surfaces of said rotor-valves, said rotor-piston and rotor valves maintaining continuous contact for forming hermetic chambers of variable volumes, three sandwiched housings, said stator housing being enclosed on both sides by two covers, said stator housing having two outlet ducts communicating with an interior central cavity of said stator housing, said interior cavity being formed by the intersection of two cylindrical surfaces of substantially identical diameter and distributed symmetrically about a central cylindrical surface substantially of larger diameter, three rotors of lenticular cross-section rotating within said three cylindrical surfaces and generated by a single common circumferential curve, said rotors having sealing means, said rotor-piston rotating within the larger cylindrical surface and having channels formed by spiral volumes communicating with the chambers within said stator housing, said channels communicating with the exterior through an annular intake distributed about said shaft, said rotor sealing means comprising:

• first auxiliary sealing means of a plurality of arc-shaped members conforming to the surface of said rotor-piston with lenticular cross-section and wave-shaped spring means between said arc-shaped members and said rotor-piston, said second auxiliary sealing means with two sheets forming flat face plates in channels along lines of contact with said rotor valves, auxiliary spring means in said channels and urging said face plates against said lines of contact with said rotor valves, said plates said plates having means for the flow of lubricating oil, said rotor-piston having interior channels for circulation of cooling fluid, cooling fin means on said stator housing, suction ring means on said rotor-piston and communicating with said chambers through said spiral volutes, the profiles of said rotors are geometrically formed by the election of two arbitrary surface circumferences orthoganally intersected, the circumscription of said two circumferences extending so that the circumference of greater diameter is circumscribed over the smaller one in an unbroken line, the smaller traced line being inscribed within the larger continuous unbroken line circumference, four circumferential arcs with radius equal to the pistons between centers being traced from a center in the intersection point of both traced circumferences and from the diametrically opposite points on the traced circumferences, so that two lenticular configurations are formed in contact by one of their points within the original circumferences, other lenticular configurations being added to the pair drawn by repeating one of them, angular displacement of the major axis of the lenticular configurations forming helicoid rotors with curved surfaces for blades.