Abstract: A Revolving piston rotary annular cylinder rotary valve continuous flow and combustion expansible chamber devices, engine machine systems with an outer annular cylinder housing assembly having a central axis, having one or a plurality of balanced pistons attached to a rotor within of the outer housing whereby, a plurality of relatively air tight compartments are formed between the interior surface of the outer housing, the outer surface of the rotor and piston assembly with the volume of said compartment varying as a function of the rotative position of the inner cylinder and rotor piston assembly in relation to the rotary isolating valve connected at one end to the housing upstream before the intake port, another end of valve being in rotary contact with outer peripheral surface of piston and said rotor assembly having an inlet for receiving any fluid and an outlet for providing said fluid.

Abstract: A gerotor pump is provided with a pump housing defining a chamber and having an inlet and an outlet separated by a planar surface. The planar surface defines a notch connected to the outlet. An inner gear member is rotatably and eccentrically supported within an outer gear member. The inner gear member defines a series of external teeth with a first tooth defining a fluid passage therethrough and a second tooth independent of fluid passages. The fluid passage is defined by an aperture extending axially through the first tooth fluidly connected to a channel extending across the first tooth on an end face of the inner gear member. The passage and the notch cooperate to form a fluid pathway for pressure relief and reduced tonal noise in the pump by disrupting harmonics during operation.

Abstract: A gaming device having a bonus scheme wherein a combination of bonus symbols trigger a bonus game and any one of the bonus symbols in the bonus game provides a player with an award. The award may be an extension of the bonus game by providing the player with additional spins or games. Also, the award may modify the combination and type of bonus symbols needed to enter the bonus game. Furthermore, the award may modify the award values in the bonus game. Therefore, a combination of bonus symbols triggers the bonus game and also triggers the gaming device to provide bonus awards in the bonus game. The re-triggering symbol award bonus scheme changes the probability of winning for the player and therefore creates a higher level of excitement and enjoyment of the game.

Abstract: An internal combustion engine in the form of a frictionless turbine includes a piston and a combustion chamber with a combustion chamber wall, which is frictionless because it has no piston rings so that the pistons do not touch the combustion chamber wall. There is clearance between the piston and the chamber wall, so that no piston lubrication is provided or needed, and the absence of friction between the piston and chamber wall permits the turbine to reach very high speeds. Computer control preferably is provided to meter fuel into the combustion chamber as turbine revolutions per minute increase from starting speed to full speed to maximize engine smoothness of operation and efficiency.

Abstract: A rotary engine includes a casing having a large circular boring, a small circular boring, whereby the small circular boring interconnects with the large circular boring. A piston rotor is carried in a rotating manner within the large circular boring in the casing. A power head, ported to pass exhaust gases thru it's hollow center shaft, is carried in a rotating manner within the small circular boring in the casing. The piston rotor and the power head are meshed together to properly rotate during operation, with the piston rotor rotating counterclockwise and the power head rotating clockwise. A second powerhead can also be used.

Abstract: A rotary engine includes a compressor assembly and two power assemblies that receive compressed air from the compressor assembly. Each assembly includes at least two intermeshing rotors. The rotors of the compressor assembly compress air, either alone or in an air/fuel mixture, in a compression chamber located in that assembly. The compressed air is transferred to the expansion chambers of the power assemblies, where fuel is ignited to initiate a power stroke. A line bisecting the axes of the rotors of the compressor assembly is inclined at an acute angle relative to a line bisecting the axes of the rotors of the power assemblies. The power assemblies operate 180° out of phase with respect to one another to minimize power fluctuations in the engine.

Abstract: A combustible fluid-operated orbital engine having sets of cooperating cylinder and piston members with respective parallel axes of rotation. Respective cylinder and piston carrier wheels with respective axes of rotation parallel to the piston/cylinder axes of rotation carrying the pistons/cylinders circularly and orbitally and at all times in opposed relation on a common longitudinal axis along intersecting counter paths. Respective gearing structures or belts/sprockets supported by the cylinder and piston carrier wheels rotate the pistons/cylinders counter to their circular motion direction to maintain their opposed relation for their periodic interfittment when their respective paths intersect. A combustible fluid supply is provided to the cylinder member for combustion coincident with the periodic interfittment in engine operating relation. The pistons/cylinders may include ceramic material. The compression sealing system is located in the entry of each cylinder rather than being connected to the piston.

Abstract: An internal combustion engine of two perpendicular, toroidal cylinders intersecting at two junctions with each cylinder containing one piston filling half of its volume. The pistons are 180 degrees out of phase; each alternately occluding one intersection or the other. Each piston completes a full power, exhaust, intake, and compression stroke in one revolution. Endplates of 45 degrees allow the combustion chamber junction to be permanently filled and sealed at all times; first by one piston, then by the tips of both pistons as the complementary-angled endplates tangentially slide past one another, and then by the other piston. Compressed gases are shunted into the crossing cylinder's combustion chamber. Both pistons orbit continuously, one-way. Airflow is also one-way. Each piston is mounted to a sealed, 360-degree, counterbalanced ring gear. One ring gear is positioned centrally and the other peripherally to prevent interference. These maintain coordination between the pistons and provide output.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can have a first wall portion with a first distal edge portion and a second wall portion with a first cylindrical surface. The second V-member can have a third wall portion with a second distal edge portion and a fourth wall portion with a second cylindrical surface. In this embodiment, the first distal edge portion of the first wall portion can be configured to slide across the second cylindrical surface of the fourth wall portion, and the second distal edge portion of the third wall portion can be configured to slide across the first cylindrical surface of the second wall portion, when the first V-member pivots about a first pivot axis and the second V-member pivots about a second pivot axis.

Abstract: A rotary machine which can be either a pump or an internal combustion engine has a housing enclosing a plurality of rotor spindles lying on the surface of an imaginary cone for driving an output shaft positioned at the vertex of the imaginary cone. The spindles have a beveled gear on one end and engaging an output shaft and a conical bearing on the other end. Angled eccentric rotors are mounted to each spindle shaped to maintain tangential sliding contact with two adjacent rotors to form a compression or combustion chamber. A spherical version of a compressor or an engine uses a plurality of rotary pistons each of which is eccentrically mounted and forms a spherical segment. Each rotary piston is mounted for tangential sliding contact with at least two other rotary pistons to form a displacement chamber therebetween. The rotary pistons use a generally “tear drop” shape. A rotary pump has a housing having a manifold for distributing intake and exhaust air.

Abstract: The problems of prior compressor structures relying upon conventional check valves are obviated by using, instead, flow control passages which operate to control flow while avoiding mechanical moving elements which may become problematical.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can have a first wall portion with a first distal edge portion and a second wall portion with a first cylindrical surface. The second V-member can have a third wall portion with a second distal edge portion and a fourth wall portion with a second cylindrical surface. In this embodiment, the first distal edge portion of the first wall portion can be configured to slide across the second cylindrical surface of the fourth wall portion, and the second distal edge portion of the third wall portion can be configured to slide across the first cylindrical surface of the second wall portion, when the first V-member pivots about a first pivot axis and the second V-member pivots about a second pivot axis.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: A rotary machine which can be either a pump or an internal combustion engine has a housing enclosing a plurality of rotor spindles lying on the surface of an imaginary cone for driving an output shaft positioned at the vertex of the imaginary cone. The spindles have a beveled gear on one end and engaging an output shaft and a conical bearing on the other end. Angled eccentric rotors are mounted to each spindle shaped to maintain tangential sliding contact with two adjacent rotors to form a compression or combustion chamber. A spherical version of a compressor or an engine uses a plurality of rotary pistons each of which is eccentrically mounted and forms a spherical segment. Each rotary piston is mounted for tangential sliding contact with at least two other rotary pistons to form a displacement chamber therebetween. The rotary pistons use a generally “tear drop” shape. A rotary pump has a housing having a manifold for distributing intake and exhaust air.

Abstract: A rotary machine including: a housing; a plurality of rotor spindles aligned along three orthogonal axes; rotor blades on the rotor spindles and arranged relative to each other so that each rotor blade is in tangential sliding contact with at least two other rotor blades and forming a plurality of working chambers each having a volume which changes as the rotor spindles rotate; a gear system including a plurality of internal bevel gears on the ends of the plurality of rotor spindles and for synchronizing rotation of the rotor spindles during operation; and a central valve mechanism with the rotor spindles extending radially outward therefrom and around which the rotor blades are arranged, wherein the central valve mechanism controls flow of a fluid to at least some of the working chambers formed by the rotary blades.

Abstract: An energy transfer machine, for example, a positive displacement internal combustion device, has a fixed or rotating outer housing, an internal rotating carrier and one or more inner rotors with rotational axes which are offset from the inner rotor carrier rotational axis. Circumferentially expandable projections from the outer housing and rotor mesh with each other to define variable volume chambers.

Abstract: An energy transfer machine, for example, a positive displacement internal combustion device, has a fixed outer housing, an internal rotating carrier and one or more inner rotors with rotational axes which are offset from the inner rotor carrier rotational axis. Projections from the fixed outer housing and rotor mesh with each other to define variable volume chambers. In another energy transfer machine, in which the outer housing may be fixed or rotating, projections of the rotor are expandable within cylinders defined by projections of the outer housing.

Abstract: A rotary motion device having piston valves that define an open region that are adapted to engage a power tooth of the power ring as the power ring rotates around the piston valves and the piston valves rotate about their own separate axis that is fixed with respect to the base housing of the device. The power ring is provided with radially inward and outward ports in one form that are adapted to communicate with radially inward and outward ports of a static member of the device. The ports are utilized to compress and expand a gas and in one form are utilized for an internal combustion chamber to create an internal combustion rotary motion device.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, a radial impulse engine includes first and second movable V-members operably disposed between first and second end wall portions. The first V-member can have a first wall portion with a first distal edge portion and a second wall portion with a first cylindrical surface. The second V-member can have a third wall portion with a second distal edge portion and a fourth wall portion with a second cylindrical surface. In this embodiment, the first distal edge portion of the first wall portion can be configured to slide across the second cylindrical surface of the fourth wall portion, and the second distal edge portion of the third wall portion can be configured to slide across the first cylindrical surface of the second wall portion, when the first V-member pivots about a first pivot axis and the second V-member pivots about a second pivot axis.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: A rotary positive displacement control system and apparatus includes a transmission assembly, at least a compression assembly and buffer assembly, and an expansion assembly, the buffer assembly disposed between the compression and expansion assembly. The compression assembly includes multiple compression rotors with lobes intermeshing with each other, and the expansion assembly including expansion rotors with lobes intermeshing with each other. An intake and exhaust port respectively located at the compression assembly and expansion assembly. The buffer assembly has a buffer chamber being able to efficiently lead compressed gases to the expansion assembly; meanwhile, residual gases can be discharged from a first and second exhaust slots both disposed on the expansion assembly.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In this embodiment, the engine further includes a plurality of movable wall portions disposed between the first and second end wall portions. Each movable wall portion includes a cylindrical surface extending at least partially between a distal edge portion and a pivot axis. Upon ignition in the combustion chamber, the distal edge portion of each movable wall portion slides across the cylindrical surface of the adjacent movable wall portion as the movable wall portions pivot outwardly in unison about their respective pivot axes.

Abstract: This rotary engine is made up of three parallel encased rotors; a male rotor, flanked by a female compression/combustion rotor, and a female separation rotor, all three coupled for synchronous rotation. The male rotor has lobes projecting from it, which mesh with complementary cavities in the female rotors during rotation. These cavities have hollows so that as the lobes mesh with them a combustion chamber is formed in the compression/combustion rotor cavities and compression zones formed in the separation rotor cavities. A passage connecting the lobe and combustion chamber provides more opportunity to convert combustion energy into rotational mechanical energy. The separation rotor serves as a pump and separates intake from exhaust gases. Passages connecting the compression zone to the combustion chamber, and that to the exhaust port, help purge residual combusted gases from the combustion chamber.

Abstract: A modular revolving cylinder engine including at least two interdependent flywheels driven in rotation by a driving device (1) that rotates them in synchronization and in opposite directions. Each flywheel includes a plurality of equally spaced hollow pushrods that are reciprocally movable along stroke lines that are parallel and offset with respect to the central axis of rotation thereof and through which combustion gases from associated combustion chambers pass outwardly of the flywheels. End portions of the opposing pushrods engage during each rotation of the opposing flywheels during which time the oppositely directed combustion gases passing through the pushrods impinge on the outer end portion of the opposite pushrod to thereby provide thrust to drive the opposing flywheel in rotation in opposite directions.

Abstract: An engine including a housing formed with a pair of side-by-side intersecting substantially cylindrical cavities, and a pair of counter-rotating power rotors rotatably mounted within the cavities. The pair of power rotors include intermeshing lobes that each define open ended combustion chambers.

Abstract: A rotary engine having a housing and a first and second intersecting cavity disposed therein. The rotary engine includes a rotor rotatably mounted in the first cavity, the rotor and the housing defining an annular chamber therebetween, and a piston extending radially from the rotor into the annular chamber. The rotary engine further includes a valve having a combustion chamber rotatably mounted in the second cavity, and a passage formed along a circumference of an inner wall of the second cavity for delivering combustion gases from the combustion chamber to the annular chamber.

Abstract: A non-reciprocating engine comprising a hollow cylindrical shaft driver (13) located in a cylindrical stator cavity (14) of a stator. A number of expansion chambers (43) form between the outer wall of the shaft driver, the stator wall and movable dividers (25) which extend from the stator to bear on the shaft driver. The expansion chambers expand and contract during operation of the engine. An output shaft passes centrally through the stator cavity and shaft driver and has offset bearings (34) which bear on the inside surface of the shaft driver. Inlet ports in a removable inlet end plate of the stator allow pressurised air or air/fuel mixture, for example, to be introduced into the expansion chambers. Sequential expansion and contraction of the chambers around the circumference of the shaft driver causes a combination of orbital and rotational movement of the shaft driver and consequential rotation of the output shaft.

Abstract: The invention relates to a rotary piston machine. A housing defines a prismatic chamber the cross section of which forms an oval of odd order, which is alternatingly composed of circular arcs having a first relatively small radius of curvature and circular arcs having a second, relatively large radius of curvature, which arcs change into each other continuously and differentiably. Corresponding first and second cylindrical inner wall sections are formed. A rotary piston is guided in the chamber, the cross section of the rotary piston forming an oval the order of which is one less than the order of the chamber. Opposite cylindrical nappe sections are formed at the rotary piston, of which, in each position, a respective one is rotatable in a cylindrical inner wall section of equal radius of curvature and the respective other one engages an opposite inner wall section. The rotary piston, in each position, subdivides the chamber into two working chambers.

Abstract: There is provided a rotary internal combustion engine (20) comprising a plurality of rotors (21) each having a plurality of lobes (22) for intermeshing with lobes of other rotors to form successive combustion chambers. Axial seal elements (60, 61) are provided at the rotor tips and trailing tips of the rotors respectively. Circumferential axial edge seals (59) are also provided to interconnect the axial seals. The seals engage sealing plates (30) on each axial side of an engine housing (29) so as to effect the combustion chambers. Fuel inlets and ignition means are provided at suitable locations, as are exhaust means.

Abstract: A rotary machine configured to product rotary power by igniting intake products that are not compressed to produce combustive products, directing the pressure produced by combustive products to a rotatable expansion ring that rotates a distance proportional to the pressure and exhausting the combustive products from the rotary machine.

Abstract: A rotary internal combustion engine has a housing and a working wheel mounted rotatably in the housing. At least one working piston is provided on the working wheel for taking in and compressing air or a fuel-air mixture and for converting gas pressure resulting from combustion of the fuel-air mixture into mechanical energy. A counter wheel with a working piston recess is provided. A combustion chamber for combusting a fuel-air mixture is formed in operation continuously anew between working piston, working wheel, counter wheel, and housing. First air vanes form spokes of the working wheel and take in the fuel-air mixture or the air through the working wheel for pre-compression of air or of a fuel-air mixture. The wheel is pulley-shaped and has an annular channel extending in a circumferential direction. The working piston is arranged fixedly in the annular channel.

Abstract: At least two rotors are mounted in a chamber and rotate synchronously to compress and/or transport fluid. The chamber has the shape of partially overlapping circles with each circle intersecting the center of the adjacent circle. The rotors are non-eccentric and have curved sides with the same radius as the circles. In exemplary embodiments, the rotors are trochoidal and the chamber is epitrochoidal. Also provided are compressors, pumps, actuators, and engines incorporating the rotary machine.

Abstract: A rotary machine having a housing with rotary components disclosed within. The rotary machine is configurable as an internal combustion rotary engine, an external combustion rotary engine, a gas compressor, a vacuum pump, a liquid pump, a drive turbine, or a drive turbine for expandable gases or pressurized liquids. The combustion engine employs a new thermal cycle—eliminating the Otto cycle's internal compression of the combustion products as part of the cycle. The new combustion thermal cycle is intake, expansion and exhaust.

Abstract: There is provided a rotary internal combustion engine (20) comprising a plurality of rotors (21) each having a plurality of lobes (22) for intermeshing with lobes of other rotors to form successive combustion chambers. Axial seal elements (60, 61) are provided at the rotor tips and trailing tips of the rotors respectively. Circumferential axial edge seals (59) are also provided to interconnect the axial seals. The seals engage sealing plates (30) on each axial side of an engine housing (29) so as to effect the combustion chambers. Fuel inlets and ignition means are provided at suitable locations, as are exhaust means.

Abstract: The invention relates to a 4-phase rotary piston combustion engine. The embodiment of the engine consists of the engine body (1) where the main cylinder (2) is located; the piston (4) which revolves in the main cylinder and a cylindrical piston body is a fixed shaft (5). Thus the shaft functions as the driving shaft of the engine. The engine is operated by two valves (6, 9) which either open or close the space existing between the main cylinder surface and the piston body. The rotation of the piston is achieved when the gas mixture compressed into explosion volume is closed in between both the valves (6, 9) in such a way that also the piston stays between the valves. When the piston moves towards the valves in front (9) it pushes the combustion gas from the front side of the piston to its back side through a groove (13) located in the surface of the main cylinder. When the combustion gas has moved to the back side of the piston, the explosion takes place and the valve in front of the piston opens.

Abstract: A thermal design and method of operation of a rotary internal combustion engine having at least one housing, a rotor rotating within the housing, and a mechanism for combusting mixture of fuel air and steam supplied into the housing to drive the rotor, in which the temperature of the inner walls of the combustion region which are in contact with combusting gases attains 700° C., and in which the temperature of the combusting gases does not exceeds 1800° C. The thermal design includes: lining of the surface of the combustion zone with heat resistive materials such as a refractory metal; the use of material with low heat conductivity such as iron for the construction of the body of the engine in order to minimize heat loses by heat transfer to ambient; and the effective cooling of the body of the engine with boiling heat transfer by water which is circulated in cooling channels passing throughout the engines structure.

Abstract: An engine displacement device including a casing with two internal overlapping rotor chambers, and rotors within the rotor chambers which are arranged to contra rotate to provide internal combustion and/or compression chambers. The casing provides for primary and secondary combustion of a fuel mix, where the device is adapted as a combustion engine.

Abstract: A rotary engine with one or more toroidal chambers defined by rotors that rotate within cylindrical housings. Pistons project into the chambers from the rotors. The pistons cooperate with valves to define compression regions and expansion regions in the chambers. The rotors, the pistons, the valves, or a combination thereof define or include combustion regions of constant volume wherein a fuel-air mixture compressed in the compression regions burns and then is ejected to the expansion regions. Fuel is injected into both the compression regions and the expansion regions, so that the engine operates according to the Trinkler cycle. In a first embodiment of the engine, the valves are rotary and include recesses that accommodate the pistons as the pistons pass the valves. As a piston transits from a compression region to an expansion region via a valve, the space in the valve recess not occupied by the piston is the combustion region.

Abstract: An improved rotary engine (12), wherein the improvement comprises a facility (58) for transferring any remaining exhaust gases from a first center well (16) in a housing (14) of the engine (12) into a cavity (34) of a second rotor (32) in a second well (18) in the housing (14) during the expansion cycle. An assembly (62) is for purging any remaining exhaust gases from the cavity (34) of the second rotor (32) in the second well (18) back into an air intake port (44) in the housing (14). An assembly (70) is for ejecting the compression of any fresh air and trapped exhaust gases into an exhaust port (48) in the housing (14) during the meshing of a piston (28) on a first rotor (26) in the first center well (16), with a cavity in a third rotor (38) in a third well (22) in the housing (14). A unit (78) is for drawing fresh air from the air intake port (44) into the cavity (40) in the third rotor (38), when the piston (28) of the first rotor (26) starts to exit from the cavity (40) in the third rotor (38).

Abstract: A rotary engine is provided with a rotary piston that is rotatively mounted within a housing. The rotary piston includes a surrounding circumferential edge that is provided with a series of distinct depressions formed therein. Formed in the housing outwardly of the rotary piston is a pair of valve housings with each valve housing including a rotary valve mounted therein. Each of the rotary valves are driven in time relationship to the rotary piston. As the rotary piston rotates within the housing, there is a series of chambers defined between respective depressions and the housing. Moreover, as the rotary piston and rotary valves rotate, they cooperate to form four separate chambers around the rotary piston, including combustion, exhaust, intake, and compression chambers. In the embodiment illustrated herein, for each revolution of the rotary piston, there are two compression, intake, exhaust and combustion cycles or phases.

Abstract: A rotary piston internal combustion engine, includes a common housing; a stationary hollow hub; two rotary piston systems in the housing, each system including at least one piston rotor having partial cylindrical areas and front areas, the second rotary piston system including two piston rotors revolving symmetrically about a common axis and about the hub; bearing means for mounting the two rotary piston systems on parallel axes in the housing such that the piston rotors mesh with one another during opposite rotation of the two rotary piston systems, paths of movement of the piston rotors are annular and overlap one another in a penetration region of the housing, the partial cylindrical areas of each piston rotor of the first rotary piston system, during rotation thereof, forming a sealing gap of great depth alternately with the housing, and with the second rotary piston system or the hollow hub, and the front ends of the piston rotors of the second rotary piston system working together with front ends of at

Abstract: A rotary gas expansion and compression device having a pair of rotors provided respectively with external and internal flutes differing in number by one, the form of which provides a continuous vertical contact. The rotors are meshed so that they form closed chambers which during rotation continuously vary in volume providing expansion and compression chambers.

Abstract: A rotary machine with lenticular pistons and valves usable for internal and external combustion engines, expansion motors and pumps. A flat central stator housing is provided with two lateral cover housings. A plurality of rotating elements enclose the interior of the stator housing and rotate on stationary parallel shafts pivoted on bearings inside the cover housing. The parallel shafts are interconnected by a synchronizing gear train which causes the shafts to rotate in one direction and at the same angular speed. A cylindrical central cavity extends in the central stator housing throughout its entire thickness, and intersects smaller cylindrical equidistant surfaces distributed around the periphery. The cylindrical equidistant surfaces contact the cavity by a rotor-piston with lenticular cross section with associated valves also of lenticular cross section and surrounding the rotor-piston. The rotor-piston and rotor valves maintain continuous contact and form hermetic chambers of variable volumes.

Abstract: A rotary engine having a housing and a first and second intersecting cavity disposed therein. The rotary engine includes a rotor rotatably mounted in the first cavity, the rotor and the housing defining an annular chamber therebetween, and a piston extending radially from the rotor into the annular chamber. The rotary engine further includes a valve having a combustion chamber rotatably mounted in the second cavity, and a passage formed along a circumference of an inner wall of the second cavity for delivering combustion gases from the combustion chamber to the annular chamber.