Abstract: A round internal combustion engine (10) comprising: a stationary toroidal combustion chamber (44); a first (24A) and a second (24B) shaft member, each for connecting thereof to at least one piston (26A1, 26A2, 26B1, 26B2) disposed within the stationary toroidal combustion chamber (44); and a positioning mechanism (60), for changing angular positioning and velocity between the first (24A) and second (24B) shaft members, for increasing and decreasing a distance between the pistons (26A1, 26A2, 26B1, 26B2) of the shaft members (24A, 24B), the positioning mechanism (60) comprising: at least one rotatable wheel (28i, 28ii, 28iii) disposed eccentrically (58) within the first shaft member (24A); and at least one rotatable connecting-rod (56i, 56ii, 56iii) disposed between the first (24A) and second (24B) shaft members, for directly connecting an eccentric anchor (36A) of the at least one rotatable wheel (28i, 28ii) to an eccentric anchor (36B) of the second shaft member (24B).

Abstract: A hybrid internal combustion engine (variants thereof) comprises a casing having an annular working chamber with intake, exhaust ports, and overflow channels; and two drive shafts coaxial with the working chamber; a stationary central gear wheel; an output shaft having an offset portion fixedly carrying a carrier and a planetary gear; connecting rods pivotally connecting the carrier and the arms of both drive shafts, wherein the overflow channels are adjacent to the working chamber and connect the compression and expansion sections thereof.

Abstract: A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft concentrically run through said cylinder and held so as to freely rotate; a rotor comprising a rotor base made up of a circular shell and a rotor blade standing in a radial direction of a rotor base surrounding wall; a shutoff valve to perform intermittent movements of insertion and returning between an outside of said cylinder and a cylinder space; and side ribs each having a longitudinal valve groove.

Abstract: A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft concentrically run through said cylinder and held so as to freely rotate; a rotor comprising a rotor base made up of a circular shell and a rotor blade standing in a radial direction of a rotor base surrounding wall; a shutoff valve to perform intermittent movements of insertion and returning between an outside of said cylinder and a cylinder space; and side ribs each having a longitudinal valve groove.

Abstract: A “TurboMotor” positive displacement rotary-piston machine comprises a casing having an annular working chamber and intake and exhaust ports, two drive shafts coaxial with the annular surface defining the working chamber and provided with rotary pistons on one end thereof and with arms on the other end thereof, a stationary central gear coaxial with the surface defining the working chamber and with the drive shafts, an output shaft concentric with the drive shafts and having an offset portion carrying a carrier and a planetary gear, the planetary gear being in mesh with the stationary central gear the carrier being pivotally connected to the arms of both drive shafts through the connecting rods. The annular working chamber of the casing communicates with the intake ports and exhaust ports and/or exit channels and entrance channels arranged sequentially and contiguously.

Abstract: Axially protruding, centrally cooled pistons rotate around a stationary primary rotation axis within a cylindrical piston chamber. The pistons are held on both of their axial ends by concentrically rotating crank disks as intertwined rotary assemblies. On the outside of each crank disk is hinged a driving piston that slides in a radial guide of two flywheels oppositely axially adjacent the piston chamber and crank disks. The flywheels rotate around an offset secondary rotation axis. As a result. The pistons are individually and oppositely alternately accelerated and decelerated. Volumes between them angularly expand and contract. Inlets and outlets are positioned along the piston chamber circumference in correspondence with expansion and contraction phases of the rotating volumes. A low number of moving parts, area sealed volumes, no valves, no dead volume, balanced mass forces, vibration free rotation and short force transmission paths provide for lightweight construction and high rotational speeds.

Abstract: A sealing system for oscillating-piston engines that include two oscillating pistons that revolve together in a spherical housing. The pistons perform reciprocating oscillating movements in opposite directions about an oscillation axis perpendicular to the axis of revolution for the pistons. Guide members are provided on the pistons and engage at least one guide groove formed in the housing. Sealing elements are disposed on or in the vicinity of all moving edges surrounding working chambers and prechambers for the engine. The sealing elements seal all the gap regions present between machine parts displaced relative to one another by revolving and/or oscillating movements and not in direct contact. Sealing elements prevent excessive penetration of lubricating fluid into inlet and outlet openings in the housing.

Abstract: The inventive volume expansion rotary piston machine includes a body (1) with a circular working cavity which is provided with and intake and exhaust channels (18, 19) and in which bladed pistons (5, 6) are disposed on two coaxial shafts (2, 3). Said shafts have arms (4) which are connected, by means of connecting rods (10), to crankshafts with planet toothed wheels which are fastened to said crankshafts and are engaged with a fixed central toothed wheel (12). The volume expansion rotary piston machine comprises an output shaft (7) with an eccentric (8) on which a planet wheel (11) with a carrier (9) are rigidly connected and mounted, and which planet wheel is kinematically connected to the arms (4) of the two shafts (2, 3) by means of the connecting rods (10).

Abstract: This invention provides a rotary engine and the type engine design method. This engine mainly has two nested rotors and a cylinder body. This invention publicizes in detail about the rotary engine movement principle and the work mechanism. This type engine can the automatic control compression ratio, the running rate be high, Structure simple and so on many kinds of merits.

Abstract: In a cat and mouse type apparatus for transforming volume variations of a plurality of chambers into a rotary motion of an axis, all of the driving mechanism is housed in a cylindric cavity coaxial with the driving axis, between the cylindric cavity, a smaller diameter inner coaxial cylinder and two discs perpendicular to the axis, a toroidal cavity in which are housed rotary pistons, each longitudinally traversed by an axis and having a circular sector in cross-section shape, the rotary pistons rotating to form cavities defined therebetween, also having a substantially circular shape in cross section, where the cavities cyclically change their volumes and an apparatus driving shaft is rotatively driven.

Abstract: The invention relates to an oscillating piston engine comprising a housing that contains a first and at least a second piston, both of which can rotate about a fixed rotational axis in the housing and which when rotating about said axis execute counter-rotating displacements back and forth about a pivoting axis that runs perpendicular to the rotational axis through the centre of the housing. A working chamber is situated between opposing end faces of the first and at least second piston. The housing is provided with at least one gas exchange opening for admitting or discharging a gas into or from the working chamber. The pistons are arranged in such a way that the rotational axis runs through the working chamber. The pistons are mounted to slide in a piston cage, which is located in the housing, is concentric with the rotational axis, and rotates together with the pistons about said axis. The gas exchange opening is arranged eccentrically in relation to the rotational axis, on one end face of the housing.

Abstract: A rotary-vane machine, has a stationary tubular housing having a lubricated pump with an oil carter, and an oil-free section, with two pairs of ports through which a working medium enters or exits, a housing cover plate, a sun gear attached to a boss, a bearing and oil transferring member, a cover disc attachable to the end of the oil-free housing section, and a tubular rotor inside of which are fixedly attachable, two tapering vanes rotatable, together with the rotor, at a uniform speed.

Abstract: A revolving piston engine incorporating revolving pistons for improving fuel efficiency, increasing power output, easy cooling and reduced vibration. One or more of revolving piston pairs, each consisting of one piston and one cylinder head, revolve within a ring cylinder, around a common axis in a same direction, but with different velocities. A revolving piston compressor is also disclosed, incorporating appropriately designed and relocated ports/valves for both of associated intake and outlet components.

Abstract: An internal combustion engine including a working chamber assembly housing, intake and exhaust ports, a pair of piston assemblies each of which assemblies includes at least one pair of diametrically opposed pistons within the working chamber assembly housing rotatable about a rotational axis of said piston assemblies, means for interconnecting said first and second piston assemblies for variable speed rotation in the same direction during recurrent periods of rotation, wherein the piston having a piston head and a piston vessel, the piston head of one piston assembly received by the piston vessel of the other piton assembly to form a working chamber. The connecting means includes a pair of internal gears, a plurality of planetary gears and means for transmitting variable speed rotation, a main transmission gear set, and a pair of auxiliary means that is connected to the piston assemblies.

Abstract: An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part.

Abstract: A system includes a rotary chamber and pistons that move in the same direction at varying and alternatively opposite velocities to each other inside a fixed structure. The chamber is rotatively formed by two rotary partial-chambers, each partial-chamber having a piston jointed thereto. The piston closes the associated partial-chamber and penetrates respectively by sliding into a hollow of the other partial-chamber, so as to create at least two compartments that alternatively vary in volume when driven by a mechanism of alternatively opposite variation of velocities.

Abstract: An oscillating-piston machine comprises a housing, in which a first and at least a second piston are arranged, which pistons can together revolve in the housing about an axis of rotation that is fixed with respect to the housing, and which pistons, as they revolve about the axis of rotation, execute oppositely directed reciprocating pivoting movements about a pivot axis running perpendicular to the axis of rotation and through the centre of the housing, the first piston having a first end face, and the at least second piston having a second end face facing the first end face, the end faces delimiting a working chamber, characterized in that the pistons are arranged in such a way that the axis of rotation runs through the working chamber.

Abstract: A rotary internal combustion engine comprising at least one but preferably a plurality of two operating chambers each having a toroidal path of travel on an interior thereof and an interactive piston assembly comprising a pair of first or driven pistons connected to a power take-off and a pair of second or driving pistons concurrently movable along the toroidal path of travel relative to said pair of first pistons. In each chamber, the pair of second pistons is periodically positionable, during each revolution, in driving relation to the pair of first pistons and is cooperatively structured therewith to accomplish the various phases of an engine cycle during forced travel of the pair of first pistons along the toroidal path of travel, thereby causing forced rotation or driving of the power take-off.

Abstract: Four-cycle rotary engines, with an even number of hinged-hub impeller vanes, utilize dependently rotating, joined, hinged-hub impellers, with interdigitated, alternating hub sections, on a shared, power output shaft, and electromagnetic fields, and timing of impeller release and capture, to provide real time compression ratio control, and to control the momentum of the rotating impellers, and mechanical clutches to transfer the rotation to the power shaft.

Abstract: This invention relates to expansible chamber positive displacement pumps, motors, and engines and includes variable displacement features. It provides a different method of making vane, piston, and roller abutment pumping devices which has benefits in sealing, dynamic and pressure balancing, and increased rotational speeds; resulting in better performance and higher efficiency. Since this is a technology that is parallel to existing technologies, this application is complex.

Abstract: There is provided a fixed displacement suction and exhaust apparatus using coaxial rotary pistons, which can be used for various kinds of compressors, vacuum pumps, fluid transfer pumps or internal combustion engines. In the suction and exhaust apparatus, two rotary pistons 16a and 16b having a plurality of wing plates 17, 57, 18 and 58 radially provided in a housing 2 having a cylinder and two sealing plates, are engaged with each other to be rotated. The rotary pistons are rotatably coupled to two connecting rod elements 41a and 41b of a connecting rod 40 coupled to rotate the crank pin 15a of a crankshaft installed coaxially therewith. The suction and exhaust chambers are produced between the spaces of each of the wing plates of the respective rotary pistons as the rotary pistons rotates at different speeds, according to the teeth proportion of external gears 42a and 42b formed in the connecting rod 40 to internal gears 22a and 22b mounted on the housing.

Abstract: A toroidal engine [20] is provided having opposed rotor assemblies [45] supporting pistons [47] arranged on each rotor assembly [45]. Part toroidal working chambers are formed between the pistons [47] in which a combustible mixture of air and fuel is compressed and then ignited at minimum working chamber volume forcing the then active pistons [47] and rotor assemblies [45] to accelerate. The rotor assemblies drive a planetary member [50] for rotation about its axis through a sliding pin connection [56]. The or each planetary member [50] is supported on a crankpin [51] of a crankshaft [40] and is integral with a planet gear meshed with a sun/annulus gear [53] centered on the crankshaft axis.

Abstract: A rotary engine including a static toroidal cavity having an inlet port for introducing fuel and air to the cavity and an outlet port for exhausting products of combustion from the cavity. A first power train including a first output shaft and a second power train including a second output shaft are located partially within the cavity and able to rotate in the first direction. A plurality of pistons are positioned around a perimeter of the toroidal cavity and between the first and second power trains. The plurality of pistons are movable with respect to the cavity and include a first set of pistons connected to rotate with the first power train and a second set of pistons connected to rotate with the second power train. The plurality of pistons defining a plurality of chambers therebetween.

Abstract: A reciprocating rotary piston system includes a cylinder (3) having an annular and hollow interior; a plurality of pistons (1A to 1D) of which first and second parties are formed to be disposed alternately on the same inner circumference of the cylinder, the first and second parties of the pistons reciprocating along a given arc at the same speed and in the opposite direction with respect to each other; a plurality of intake valves (4A to 4D) mounted at each point of the cylinder where the two adjacent pistons meet for controlling flow of a fluid introduced therein to from the outside; and a plurality of exhaust valves (5A to 5D) mounted at each point of the cylinder where the two adjacent pistons meet for controlling flow of a fluid forced out from the inside. The piston system is used for a hydraulic/pneumatic pump, a vacuum pump and an internal combustion engine.

Abstract: In a small oscillatory type rotary piston engine, first and second rotors are provided, having first and second independently rotatable drive shafts. An engine output shaft is affixed to a rotatable carrier bowl member which carries a pair of rockers coupled to a pair of counterweighted rotor drive shaft arms each affixed to respective rotatable rotor drive shafts via first and second connecting rods. Each rocker has a centrally positioned, bearing mounted guide pin, positioned within an elliptical cam groove formed in a stationary baseplate made of hard alloy, for changing the relative angular positioning between the rotors during oscillatory, scissor action operation of the rotary piston engine. Shock-absorbent connecting rod elements are also provided within the connecting rods.

Abstract: A toroidal engine [20] is provided having opposed rotor assemblies [45] supporting pistons [47] arranged on each rotor assembly [45]. Part toroidal working chambers are formed between the pistons [47] in which a combustible mixture of air and fuel is compressed and then ignited at minimum working chamber volume forcing the then active pistons [47] and rotor assemblies [45] to accelerate. The rotor assemblies drive a planetary member [50] for rotation about its axis through a sliding pin connection [56]. The or each planetary member [50] is supported on a crankpin [51] of a crankshaft [40] and is integral with a planet gear meshed with a sun/annulus gear [53] centered on the crankshaft axis. The crankshaft [40] may be arranged to counter-rotate relative to the rotor assemblies [45] by meshing the planetary member gear [52] with an annulus gear [53] or in the same direction by meshing with a sun gear.

Abstract: The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction valve devices (8) and to a joint pressure line (5) by way of pressure valve devices (9), wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in one of the associated lines (4, 5), and wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in the pressure line (5).

Abstract: An extracorporeal blood pump for cardiac surgery is disclosed having a housing with a cylindrical cavity, radially-spaced input and output ports and a pair of radial blades within the cavity. The blades are supported on independent, concentric axles such that one blade can remain between the ports while the other blade rotates to create independent input and output chambers. Magnetic elements attached to the axles are in magnetic coupling relation to corresponding magnetic elements of two independent motors. The blades and magnetic elements corrected thereto are covered in plastic and are hermetically sealed within the housing. A programmable logic controller controls the motion and the blades to simulate the pulsatile pumping of a human heart. The axles of the blades can extend out one side of the housing for engagement by a manual activation device operable to continuously alternately rotate one of the axles one half rotation while holding the other axle motionless.

Abstract: A rotary engine in which two rotors having interleaving radial vanes move with cyclic rotary motion superposed on uniform rotary motion inside a cylindrical cavity in a cooled engine housing. The rotor vanes divide the cylindrical cavity into four compartments in which intake, compression, explosion and exhaustion occur. The rotor motion is obtained by a gear and linkage system made up of an internal gear which rolls on a fixed external gear. The internal gear, having a pitch diameter of 3/2 the pitch diameter of the external gear, is contained in a moving housing that has crank pins that move in epicycloidal curves. Each crank pin is coupled to a crank on one of the rotors. Ignition timing is done by sensing the motion of the internal gear housing using magnetic means or optical means.

Abstract: A positive displacement fluid machine comprises a body including a circular cylindrical cavity with two closed ends and two port openings respectively open to the two opposite halves of the cylindrical cavity respectively located on two opposite sides of a plane of symmetry, a vane assembly including a plurality of vanes disposed in a radially extending pattern from a central shaft rotatably and pivotally supporting the plurality of the vanes, which vane assembly is disposed within the circular cylindrical cavity in a coaxial relationship therebetween wherein the radial edges of the vanes slide on the circular cylindrical wall of the cylindrical cavity, and a cam follower-guide mechanism controlling separation angle between adjacent vanes in such a way that the separation angle between adjacent vanes increases from a minimum value to a maximum value in one of the two opposite halves of the cylindrical cavity and decreases from the maximum value to the minmum value in the other of the two opposite halves of th

Abstract: This invention relates to improvements on rotary engines having annular cylinders, each having at least two pistons drivable in rotation therein, the pistons being fixed respectively to concentric shafts that are thereby independently rotated around their concentric axis. Each of the concentric shafts extends through all the cylinders, which are formed by rotatable discs within an annular master cylinder. The concentric shafts are supported for rotation by bearings mounted within the end housings of the annular master cylinder with each of the concentric shafts having an end extending through one of the end housings for connecting to means for independently coupling the two concentric shafts to a common eccentric shaft.

Abstract: A variable compression ratio rotating engine comprises a containing cylinder forming variable volume chambers, defined by the cylinder inner wall and piston side walls, the cross-section of which has substantially the shape of a circle sector. During the operation of the engine, the pistons are rotated with an uneven circular motion, by a mechanism including a crank, having an eccentric axis with respect to that of the containing cylinder, and small coupling rods coupling the arms of the crank and the end portions of small shafts passing through the pistons, the compression ratio being changed by means of a further mechanism able of changing the eccentricity value of the crank axis with respect to the cylinder axis.

Abstract: The rotary piston engine has a rotatable annular cylinder and rotatable piston elements interconnected through a cross-linkage mechanism eccentrically arranged relative to the longitudinal axis of the annular cylinder for causing relative oscillatory motion between the piston elements and the annular cylinder. The cross-linkage mechanism has cross arms coupled through a cross connecting arm to the eccentric shaft such that the cross arms do not cross over in each revolution of the annular cylinder.

Abstract: The present invention comprises two complementary gear wheels each of which have a plurality of vanes fixed to the interior faces thereof. The vanes are interlocked in overlapping relationship and the gears are free to rotate independently of one another at different speeds so as to cause the gaps or chambers between the vanes to vary depending upon the changes in the relative speed of the two wheels with respect to one another. Various means are provided for driving the two wheels independently of one another at varying speed ratios. Chain and sprockets may be used, or complementary gears of varying shapes and having different numbers of lobes may be used to accomplish different patterns of movement of the two wheels with respect to one another. Furthermore, variable drive means may be provided for driving the two wheels so as to provide positive control of the variance in the movement of the two wheels.

Abstract: In a rotary piston machine with a cylindrical housing and a drive shaft lying in the cylinder axis, the housing encloses a hollow rotation space in which three sector-shaped rotary pistons provided with sealings and having angular velocities periodically changing relative to each other are arranged one after the other, so that working spaces develop between the rotary pistons whose volumes change periodically. For this purpose, the drive shaft carries an eccentric cam on which is posed a rotating driving plate provided with internal toothing which engages a spur wheel, the driving plate carrying driving pins each in operative connection with a piston rod and having a torsion-resistant connection to one of the rotary pistons via a hollow shaft.

Abstract: A rotary piston machine is shown that is operable with a compressible fluid; such as a rotary pump, compressor or engine construction. There is a housing having an inner and an outer ring member that are rotatably mounted on a common axis. The outer ring has at least two diametrically opposed inwardly directed segmental pistons. The inner ring has at least two diametrically opposed outwardly directed segmental pistons so as to define working chambers therebetween. An oscillating coupling means is positioned within the inner ring and flexibly joined to both ring members as well as rotating around a fixed offset crankpin to cause the inner and outer pistons to change position with relation to each other as the two ring members revolve around their common axis so as to create compression and expansion strokes.

Abstract: A fully rotary engine adaptable to internal combustion or operation from an external heat source is provided wherein a drum-like housing containing a plurality of roller vanes contacts the inner surface thereof with the contact being maintained by a cylindrical inner race. At each end of the housing a torque plate, having a centerline offset from that of the housing and vane guide grooves which control the distance between each pair of roller vanes, transmits the rotation of the roller vanes to an output shaft running through the center of the torque plates. Rotation of the output shaft is provided by alternately increasing and decreasing the distance between adjacent roller vanes through expansion and contraction of a contained gas or through combustion and exhausting of a fluid/air mixture.

Abstract: A vane type fluid power machine wherein each vane has a cyclically varying rotational velocity, whereby the compartments formed between adjacent vanes are caused to sequentially expand and contract to produce pump or motor action. Cyclical vane speed changes are produced by unique crank-rotor assemblies associated with each vane unit.

Abstract: A rotary internal combustion engine comprising a stationary, water cooled housing having a large cylindrical bore in which a hollow cylinder with end walls rotates. On said cylinder a pair of wedge-shaped pistons is mounted diametrically opposed to similar reactor elements carried by a multiple splined shaft, said reactor elements remaining stationary during ignition and expansion and they are then accelerated by a novel crank mechanism to reduce the gap between the pistons and the reactor elements to exhaust the burned gases and/or compress the intake mixture of gas and air before ignition takes place.

Abstract: The rotary-piston engine of U.S. Pat. No. 3,736,080 has two sets of pistons rotatable about a common axis in a casing. One set is attached to the output shaft of the engine for continuous rotation with the same while a motion-transmitting train connects the two sets in such a manner that the pistons of the other set are rotated at cyclically varying speed to expand and contract combustion chambers circumferentially bounded by respective pistons of the two sets. The motion-transmitting train includes crankshafts excentrically mounted on the output shaft and driven by planet gears meshing with an internal ring gear on the engine casing, and connecting rods linking each crank with the second set of pistons. According to this invention, the engine includes a central gear coaxial with the ring gear, meshing with the planet gears, and driving a second output shaft coaxially rotatable in the first-mentioned shaft.