Abstract: An engine having an annular cylinder formed about an opening which utilizes an arc-piston reciprocally positioned in the annular cylinder with a partition secured within the annular cylinder separating the annular cylinder into an air intake compression chamber and a gas combustion chamber such that in use upon reciprocation of the arc-piston one of the chambers is expanding while the remaining of the chambers is contacting is disclosed. Within the opening a conventional gas turbine may be positioned and the rotational power of the arc-piston engine is combined with the rotational power of the gas turbine.

Abstract: Two pairs of double-acting pistons are disposed in a hollow toroidal structure. Each pair of the double-acting pistons is operatively connected together and moves in the same rotational direction. Each of the pistons has two heads which cooperate with a head of an adjacently disposed piston to define a cylinder therebetween. Near the closest approach of two opposed heads, the fuel-air mixture is burned and the pistons recede from each other on an expansion stroke. Near their farthest separation, one of the opposed heads of the defined cylinder first opens an exhaust port and then the other one of the opposed heads opens an intake port. On a return compression stroke, during which the opposed heads move toward each other, the exhaust port is closed first and the intake port last.

Abstract: An engine having an annular cylinder formed about an opening which utilizes an arc-piston reciprocally positioned in the annular cylinder with a partition secured within the annular cylinder separating the annular cylinder into an air intake compression chamber and a gas combustion chamber such that in use upon reciprocation of the arc-piston one of the chambers is expanding while the remaining of the chambers is contacting is disclosed. Within the opening a conventional gas turbine may be positioned and the rotational power of the arc-piston engine is combined with the rotational power of the gas turbine.

Abstract: A rotary piston internal combustion engine includes a housing defining a cylinder chamber in the form of a circular ring. An even number of pistons circulate in the piston chamber and are of a circular cross-section adapted to the cylinder chamber. Two piston carriers mounted rotatably about the axis of the cylinder chamber each carry half the number of pistons, the peripheral surfaces of the piston carriers being such that they supplement the internal surface of the cylinder chamber to constitute a circular cross-section which corresponds to the pistons and against which piston rings on the pistons seal. At least one sealing ring is accommodated between the piston carriers and between each piston carrier and an oppositely disposed wall of the housing in an annular groove of the housing or a piston carrier respectively. The sealing ring bears against a co-operating surface of the respective piston carrier under a force which acts out of the annular groove.

Abstract: An internal combustion engine having a plurality of arcuate pistons mounted to ends of pivotally moveable connecting rods. Each piston oscillates within an arcuate cylinder and a combustion chamber is provided at each end of the cylinder. Crankshafts are connected to the connecting rods and the crankshafts are caused to rotate when combustion occurs alternately in one combustion chamber and then in the other combustion chamber in each cylinder. An output shaft is associated with one of the crankshafts.

Abstract: The system including an internal combustion engine provides the motive power source to the main and tail rotor systems of a helicopter. The engine has a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake port, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine in a typical four stroke cycle system. The engine includes the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft, and the use of pistons having gabled surfaces that are rigidly connected to the torque discs.

Abstract: An oscillating piston machine, specifically adapted for use as an Internal Combustion Engine, preferably for two stroke operation, or alternatively, specifically adapted for use as a compressor, or alternatively as a pump, or alternatively as a fluid driven motor, comprising a plurality of arcuate, rectangular faced, double acting, oscillating pistons, symmetrically secured to an oscillating disc supported by an oscillating flange, mounted on bearings on a long central shaft fixed to a robust wall of a crankcase housing; the oscillating flange face contains a gudgeon pin linked by a single connecting rod to the crank pin of an output crankshaft, and mounted in bearings on the same wall. Rotation of crank shaft produces oscillating motion of flange, disc, and pistons. The pistons oscillate within an annular enclosure formed by the oscillating disc, and a stationary inner concentric cylinder, bolted to a stationary disc, bolted to an outer concentric cylinder, bolted to the crankcase housing.

Abstract: The system including an internal combustion engine provides the motive power source to a pumping system for the transference of fluids, e.g. water. The engine has a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake ports, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine. The engine includes the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft, and the use of pistons having gabled surfaces that are rigidly connected to the torque discs.

Abstract: A system including an internal combustion engine provides the motive power source to for charging batteries of an electric motor powered vehicle. The engine has a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake ports, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine. The engine includes the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft and the use of pistons having gabled surfaces that are rigidly connected to the torque discs.

Abstract: An internal combustion engine provides the motive power source to various types of aircraft using a ducted fan. The engine has a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake ports, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine. The engine includes the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft, the use of pistons have gabled surfaces that are rigidly connected to the torque discs, and fan blades attached to the rotating annular cylinder providing the air thrust for propelling the aircraft.

Abstract: An opposed piston internal combustion engine comprises an output shaft, at least one cylinder, at least one pair of first and second opposed pistons slidable in said cylinder, a first cam connected to the output shaft and a first cam follower assembly connecting the first piston to the first can, a second cam connected to the output shaft and a second cam follower assembly connecting the second piston to the second cam, an intake valve comprising a slide valve obtained by first piston covering and uncovering an intake port provided in a sidewall of the cylinder at a first end of the cylinder, and an exhaust valve comprising a slide valve obtained by the second piston covering and uncovering an exhaust port provided in the sidewall of the cylinder at a second opposite end of the cylinder, the first and second cams cooperating to provide a cycle of relative movements between the pistons and of valve actions giving rise to five cycles of (i) intake, (ii) compression, (iii) expansion, (iv) exhaust, and (v) return

Abstract: A two-stroke-cycle engine has a pivoted divider oscillating within a fan-shaped combustion volume. The divider is connected to a connecting rod which is connected to an output crankshaft. Seals are used instead of piston rings. Each of the two radial walls has a spark plug and a fuel injection tube located near the outer end. Each planar parallel side wall has an air inlet port near the inner end. An exhaust port is located in the center of the arcuate wall.

Abstract: An improvement in an internal combustion engine having a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake port, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine. The improvements include the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft and the use of pistons having gabled surfaces that are rigidly connected to the torque discs.

Abstract: An internal combustion engine has a rotating annular cylinder containing a plurality of mutually oscillating pairs of pistons, one of each pair being rigidly fixed to a first axially-oscillating tube, the other of each pair being fixed to a second such tube concentric with the first. Each of the tubes is connected, by a "Scotch yoke", to a crank throw on a crank shaft. Each Scotch yoke includes an arm fixed at one end to its associated tube for oscillation therewith. The arm includes an elliptical slot that carries an annular ball bearing race for movement therein, one crank throw being journaled within each race. The cylinder is rotated by the crankshaft through a gear train in a fixed ratio to the rotation rate of the shaft. The pistons, having conical end faces, impart a rotational motion to the crankshaft during the power stroke of the cycle, the rotation of the crankshaft, in turn, imparting an oscillation to the piston pairs to actuate them in accordance with the strokes of the engine cycle.

Abstract: The motor comprises a casing defining a circular cavity in which a rotor is rotatably mounted. The rotor is keyed to a hollow shaft issuing from the casing. A pair of angularly-spaced radial partitions are fixed to the casing, extend across the cavity and are in sealing engagement with the rotor. The partitions define a compressor chamber and a work chamber. A hollow compressor piston and a work piston are fixed to the rotor at angularly-spaced locations and extend within and are in sweeping engagement with the compressor and work chambers, respectively. The compressor piston communicates with atmospheric air through the hollow of the shaft. A pair of valved air inlet ports open in the compressor chamber adjacent to respective partitions for adjusting the amount of air entering the latter chamber. An outlet port opens in the work chamber intermediate the partitions.

Abstract: The present invention provides a structure of an engine which employs a cylinder block the cross-sectional configuration of which defines a predetermined curved surface and a piston having the same curved surface as that of the cylinder block, thereby enabling the arcwise reciprocating motion of the piston along the curved surfaces to be transmitted in the form of rotational motion for driving a shaft. Further, the engine is arranged as being a rotor composite engine in which the arcwise reciprocating motion obtained from the cylinder block and piston having such special configurations is transmitted to a connecting rod and further to a connecting rod body having a rotor journal and a rotor gear, thereby enabling the shaft driving force to be transmitted with high efficiency.

Abstract: A free piston combustion chamber coupled to air compression and gas expansion chambers are combined with a rotary motor. The rotary motor shaft drives the air compressor, receives power from the expanding gases in the expansion chamber and provides residual torque and power for external use. Two combustion chambers located at each end of the free piston receive compressed air and fuel for combustion outside of the rotary motor assembly. The motion of the free piston between the two combustion chambers is independent of the motor rotary motion. The air admission inside the combustion chambers, the fuel injection and the combustion initiation process are all controlled and timed by the free piston movement back and forth. A heat exchanger is located between the combustion-chamber/free-piston assembly and the rotary motor. The compressed air exiting from the compression chamber is heated by the gases exiting from the combustion chambers, before they are admitted into the expansion chamber of the rotary motor.

Abstract: The engine comprises a spherical chamber within which moves a dual piston mounted to rotate reciprocatingly about a shaft going through the center of said chamber, the chamber being closed by a cylinder head. Said piston is basically shaped as a semicircular vane and is attached to a cylindrical shaft. It extends orthogonally along the shaft's generatrices. Said piston has a slightly smaller radius than the spherical chamber so that it moves about near the inside wall of said chamber. Sealing is provided between the piston and the chamber in the form of at least one sealing strip embedded in a groove in the periphery of the piston. The cylinder head extends across the diameter of the chamber and has, on at least one of the sides of the shaft and near thereto, an edge extending parallel to said shaft's generatrices. Sealing is provided between said shaft and said cylinder head in the form of at least one sealing insert embedded in a groove in the length of said edge.

Abstract: This invention is an internal combustion engine having arcuate pistons inside a rotating annular cylinder block which is divided into two combustion chambers by a pair of diametrically opposed cylinder heads. Each combustion chamber has an air intake port and an exhaust outlet for burned gases. The arcuate pistons form within the cylinder heads two combustion chambers and two compressors or pumps. The relative rotation of the cylinder and the arcuate pistons is controlled by mechanical scissor-action-type eccentric cranks connected to an eccentrically rotatable ring.

Abstract: The machine comprises at least one central pivot 7 angularly fast with a control member 1 and mounted for oscillation on said control member 1 around a direction perpendicular to the axis of the control member 1 and a first eccentric 31 the axis of the active portion of which 33 passes through the intersection of the axes of the control member 1 and of the central pivot 7.A piston 22 turns on the active part 33 of the eccentric 31 and is pivoted concentrically to the axis of the central pivot 7. This piston comprises at least one active face 24 moving within at least one chamber 8 to modify its volume. It comprises further cinematic means 37, 38, 41 imposing a relative rotation between the eccentric 31 and the control member 1.The walls 10, 11 of the chamber 8 are fast with the central pivot 7.

Abstract: A variable length stroke piston is provided in an internal combustion engine having an engine block means including a toroidal shaped cylinder, a piston positioned in the cylinder for arcuate reciprocation therein, a piston rod means pivotally positioning the piston for movement about the center axis of the toroid defining the cylinder, a regulatory shaft positioned parallel to a crankshaft and with a connector link extending therefrom, articulated link means pivotally interconnecting the piston rod to the engine connecting rod and operatively connecting to the regulatory shaft, and means operatively connect the regulatory shaft to the accelerator controlling the engine to rotate the regulatory shaft through a controlled arc with changes in the setting of the accelerator and reduce the length of piston stroke with reduced fuel supply to the engine to maintain substantially uniform compression in the cylinder at all times.

Abstract: An internal combustion engine includes a rigid wall having a curved surface which forms part of the combustion chamber. The remaining part of the combustion chamber is formed by a flexible curtain whose outer edge is attached and sealed to the rigid wall. The wall and the curtain together form a closed space whose geometry and volume depend on their relative position. When the curtain moves toward the wall, the two approaching surfaces displace gas toward the center of the combustion chamber, thereby compressing it or expelling it from the chamber.

Abstract: As cold start is initiated in a spark-ignition internal, fuel injection combustion engine, lower molecular weight constituents fo a full-range gasoline are selectively eluted by an elution system including an adsorbent bed of adsorbent material (cold start cycle). Under such circumstances, the adsorbent bed forms an elution zone within a cannister assembly. Entry of the full-range gasoline is initiated by a valve and conduit network under control of a fuel injection control circuit. Furthermore, when the engine is in an inoperative state (vapor capture cycle) the same adsorbent bed is also capable of performing a second function: it adsorbes evaparative emissions originating from within the gasoline tank.