Abstract: An integrated speed reducer and gerotor pump is disclosed. The device comprises a motor, a speed reducer, and a gerotor pump. The motor provides torque at an elevated speed. The speed reducer is coupled with the motor and converts the torque at an elevated speed into torque at a reduced speed. The gerotor pump is coupled with the speed reducer and uses the torque at the reduced speed for pumping fluids.

Abstract: Two-cycle, single vane impeller, hinged hub rotary engines are simple embodiments of a new class of engines. The 2-cycle, hinged hub rotary engines have dependently rotating impellers with, interdigitated, alternating hub sections, a hinge like rotation joint. These 2-cycle engines have expansion and exhaust cycles. The intake and compression cycles are performed by a synergistic air compressor (fan or piston type). Fuel and oxidizer (e.g. compressed air, from a synergistic air compressor,) are injected, to create combustion mixtures, and spontaneously ignited to start the expansion cycle in the minimized expansion sector(s).

Abstract: In one aspect the present invention describes an electronic circuit for transmitting voice packet data over a wireless network with an upstream transmission mode and a downstream transmission mode. The circuit comprises a first phase-lock loop (PLL) for locking a first clock to a time stamp signal, wherein the first clock synchronizes upstream data transmission over the wireless network; and a second PLL for locking a second clock to the time stamp signal, wherein the second clock is used for sampling voice data for downstream voice data transmission over the wireless network.

Abstract: A rotary engine includes a housing, a shaft, a plurality of main pistons, a plurality of main piston rods, a plurality of following pistons, a plurality of following piston rods, a following piston timing mechanism and a plurality of timing bars.

Abstract: A rotary vane motor uses a gear train arrangement for controlling the position of the vanes as well as the compression ratio of the motor. The motor includes a first pair of vanes namely a leading and trailing vane defining a working chamber therebetween and an opposed second pair of vanes namely a leading and trailing vane defining therebetween a second working chamber. Preferably the motor uses a pair of second order elliptical gears for controlling movement of the vanes to define an intake stage, a compression stage, an expansion stage, and an exhaust stage. In a preferred structure of the motor both the intake port and the exhaust port are movable to change or alter the intake stage and the exhaust stage respectively.

Abstract: Toroidal internal combustion engine comprising two concentric engine rings. Intake valves are assembled in two faces of one set of pistons and exhaust valves in two faces of the second set of pistons. The intake-valve pistons are fixedly attached to one of the engine rings and the exhaust-valve pistons to the other engine ring. The face of one intake-valve piston and the face of one adjacent exhaust-valve piston form boundaries of an engine chamber. Combustion forces on the piston faces force the two concentric engine rings to counter-rotate. The intake-valve piston and the adjacent exhaust-valve piston sweep the same chamber volume at different strokes of the engine cycle. The engine is constructed of CRC material and mounted on a central shaft, with the intake manifold and the exhaust manifold mounted on each side of the engine, providing a lightweight, self-lubricating, highly fuel efficient, and dynamically balanced engine.

Abstract: Internal combustion engine and method in which pistons on different rotors move relative to each other to form chambers of variable volume in a toroidal cylinder. The pistons move in stepwise fashion, with the pistons on one rotor travelling a predetermined distance while the pistons on the other rotor remain substantially stationary. Fuel is drawn into a chamber as one of the pistons defining the chamber moves away from the other, and then compressed as the second piston moves toward the first. Combustion of the fuel drives the first piston away from the second, and the spent gases are then expelled from the chamber by the second piston moving again toward the first. An output shaft is connected to the rotors in such manner that the shaft rotates continuously while the rotors and pistons move in their stepwise fashion.

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 rotary piston engine (20) is shown that includes a housing (22) having a toroidal working chamber with inlet (56) and exhaust (54) ports. First and second piston assemblies (30 and 32), each of which includes at least one pair of diametrically opposed pistons (30A and 30B, and 32A and 32B), are located in the working chamber. Piston assemblies (30 and 32) are connected to the engine output shaft through a differential (78) and two pairs of the Sakita gear sets (74 and 76), each of which gear sets includes a Sakita type 1 gear (74A and 76A) and a Sakita type 2 gear (74B and 76B). The piston assemblies rotate at variable speed, whereby pistons of the slower speed are trailing pistons during portions of the power and intake phases of engine operation. In one embodiment, one of the Sakita gears includes teeth in the form of rollers. Also, spark plugs embedded within piston assemblies (30 and 32) are accessible from outside.

Abstract: The engine comprises four open-ended curved cylinders (10) disposed in torroidal arrangement with respect to a central pivot point (11). Two piston arms (12) are pivoted about the point (11) and carry at their ends four pistons (13). Each piston (13) has two faces so mounted to the piston arm (12) as to face tangentially one away from the other for alternate engagement with adjacent ends of two of the cylinders (10).

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

Abstract: A cat and mouse type device includes at least one rod fixed to a shaft with at least one planetary gear rotatably attached to an end of the rod. Bars extending away from the planeatary gear ride in grooves on the faces of two rotors. The planetary gear rotates around a fixed sun gear attached to the housing, so that the two rotors rotate with respect to one another and with respect to the housing in a predetermined manner. Protuberances may be provided to extend away from the rotors and the planetary gear to interact with one another during rotation, preventing the rotors from deadlocking.

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 cat and mouse type device includes at least one rod fixed to a shaft with at least one planetary gear rotatably attached to an end of the rod. Bars extending away from the planeatary gear ride in grooves on the faces of two rotors. The planetary gear rotates around a fixed sun gear attached to the housing, so that the two rotors rotate with respect to one another and with respect to the housing in a predetermined manner. Protuberances may be provided to extend away from the rotors and the planetary gear to interact with one another during rotation, preventing the rotors from deadlocking.

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: A rotary machine in which plural, non-cylindrical rotors are provided for rotation within partially overlapping cylindrical bores, formed within a machine housing. Each rotor each said rotor has a curved outer surface formed of a plurality of contiguous mutually tangential curved portions.* The rotors are eccentrically mounted for synchronized, same directional rotation, within their respective bores, and each is arranged to alternately provide intake and exhaustion of working gaseous fluids, such that each rotor is continually either admitting or exhausting a working gas. The machine is constructed such that the rotors are cylindrical, each being of internally balanced form. The rotors do not touch each other or any portion of the machine casing at any time, while being positioned so as to define minimal gaps therebetween. A high rotational speed may be developed, thereby obviating the need for seals entirely, and thus further increasing the available speed, and thus the work efficiency of the machine.

Abstract: An oscillatory scissor type rotary engine having two rotors wherein first and second rotor drive mechanisms are located on first and second opposite sides of the engine respectively, each rotor drive mechanisms including a carrier bowl that is rigidly fixed to an output shaft passing through the two hollow rotor drive shafts and mounted in bearings thus obviating the need for a separate drive mechanism support structure. By evenly spreading the load between all meshed gears through the provision of shock-absorbent members in the connecting rod heads, and of an increased number of symmetrically positioned planetary crank-and-pinion units on each side of the engine, and by evening out the impact loading through the use of drive components as flywheels, the resultant design is made simple, reliable, durable and dynamically balanced.

Abstract: A compressor includes a normally open discharge valve assembly for controlling compressed refrigerant flow from the discharge chamber through the compression members. This controlling of flow results in an increased performance for the compressor by reducing recompression volume and the elimination of reverse rotation at shut down. The discharge valve assembly includes a valve seat, a valve plate and a valve stop secured within a recess formed within the compressor. The valve stop and the valve seat include a contoured surface which is engaged by the valve plate when it opens and closes. The contoured surface control the movement of the valve plate.

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 rotary machine, usable as an engine or as a pump, has a toroidal cylinder (25) which is swept by continuously rotating disc-like piston (34). The cylinder has a double disc valve arrangement (42, 44) at one point, so that it can be divided into a compression side and an expansion side. However the piston has to pass the position of the valve during each revolution, and the valve opens briefly to allow this to happen. The compressed gas is forced into a storage chamber (62) outside the cylinder, and a valve (64) which is operated independently of the double disc valve arrangement (42, 44) is used to determine how much gas is admitted to the combustion chamber (25c), and when it is admitted.

Abstract: A rotary internal combustion engine comprising a generally cylindrical shaped rotor housing, a pair of cylindrical shaped rotary discs having inner and outer concentric members and a plurality of spaced apart vanes connecting the inner and outer concentric members and extending axially outward therefrom, a pair of substantially flat stators mounted over the open ends of the rotor housing and an injection system. The rotary discs are structured for mating engagement with one another by inserting the vanes of each rotary disc into the chambers of the other rotary disc formed by the vanes and the inner and outer members, thereby forming an interlocked rotary disc assembly structured to rotate within the rotary housing. A plurality of spark plugs protrude through spaced apart mounting holes in one of the stators and into the combustion chambers. A plurality of spaced apart exhaust ports extend through the other stator.

Abstract: An internal combustion rotary engine includes a stationary, centrally located manifold having an intake and an exhaust port. Inner and outer rotor assemblies are provided which rotate in a common direction about the centrally located manifold. Each of the inner and outer rotor assemblies includes two pairs of diametrically opposed pistons, generally of octagonal shape which divide a rotating internal volume, defined by the outer rotor assembly, into four working chambers. Pistons of the inner rotor assembly slide along related walls of the outer rotor assembly and by this arrangement, the four working chambers communicate periodically with the intake and exhaust ports. Angular movement of the inner rotor assembly against the outer rotor assembly ensures that each working chamber is at minimum volume and at a maximum volume four times per revolution of a crankshaft of the engine.

Abstract: A power unit for use as a pressure-fluid-operated motor and/or a pressure fluid pump, the power unit comprising a cylinder space, pistons movable in the cylinder space and channels for pressure fluid. The cylinder is annular and the pistons extend radially to the inner circumferential surface of the cylinder space and are arranged to rotate around the axis of the cylinder space. The power unit further comprises a transmission shaft and locking members for successively locking the pistons so that they cannot rotate with respect to the cylinder space. The pistons are alternately locked while pressure fluid is alternately supplied and discharged from chambers between the pistons so that the pistons are rotated in succession either to deliver power as a motor or pressurized fluid as a pump.

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: A rotary engine, has a stationary casing having an internal cylindrical surface with an axis, two substantially identical cylindrical rotors rotatable about a common axis coinciding with the axis of the cylindrical surface in a start mode and a stop mode in a same direction so that one rotor starts to move before another rotor finishes its movement to provide a common turn by .psi., a power output shaft rotatable mounted in the casing and having an axis of rotation which is parallel to and displaced from the common axis of the rotors; transmission a unit including two substantially identical half-pinions which are mounted on the shaft and angularly displaced relative to one another by an angle of 180.degree., and a unit producing an alternate movement of the rotors in the start and stop modes, the alternate movement producing a unit including two substantially identical cylindrical cams which are mounted on the shaft and angularly displaced relative to one another at an angular of substantially 180.degree..

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 internal combustion engine has first and second paddles, hubs and side-discs substantially sealingly in the internal-combustion-cycle chamber and freely rotatable on a drive shaft, First and second gear trains are for rotation by the respective end portions of the hubs.

Abstract: A dveljagimmal device (1) serving as a control mechanism and a gearing suitable for use in conjunction with a rotary machine of the "cat and mouse" type. The device (1) comprises a stationary housing (2) from which extends a first (3) and second (4) shaft, the shafts (3,4) being coaxial. The device (1) is characterized in that the second shaft (4) terminates in a frame (5) which rotates in company with rotation of the second shaft (4). The device (1) further comprises a first (6) and a second (7) annular bevel gear, which first (6) and second (7) annular bevel gears are fixedly mounted to the housing (2), are coaxially aligned with the first (3) and the second (4) shafts, and are spaced apart allowing the frame (5) to be freely rotatable therebetween.

Abstract: A rotary engine having two interdigitated rotors (FIGS. 1a, 1b, or 1c) each of which has two radial vanes dividing a cylindrical cavity in the liquid-cooled rotor housing (11 in FIG. 2) into four chambers. The rotors are coupled to a planetary gear system (FIG. 2 ) by connecting rods (19 and 29) to planet gears (22 and 32) that rotate about a fixed sun gear (27) having a diameter twice the diameter of the planet gears. During one revolution of the output shaft (25), which is connected to the planet gear cage (24), the rotors alternately speed up and slow down, causing the size of each of the four chambers to vary from a maximum size to a minimum size twice. As the chambers rotate about the axis of the cylindrical cavity, they pass an inlet port (13), outlet port (14) and ignition plug port (15) contained in the housing so that intake, compression, explosion and exhaustion occurs in each chamber for one revolution of the output shaft.

Abstract: A rotary engine including a piston assembly having first and second adjacent hubs. The hubs are rotatably mounted in a housing about a common axis where they are coupled to two drive shafts that are concentrically arranged about the common axis. A first and second set of pistons extend radially outwardly from the first and second hubs, respectfully. Each piston head from the second set of piston heads is circumferentially spaced from a piston head of the first set to form a fuel expansion chamber therebetween. The distance between the rotational exes of the hubs and the outer peripheral surface of the piston heads is at least three times the distance between the outer peripheral surface of the piston assembly hubs and the outer periphery of the piston heads, i.e., the radial depth of the expansion chambers.

Abstract: A rotary engine in which two rotors having interleaving radial vanes (3,4,8,9) revolve inside a cylindrical cavity and are connected to a planetary output gear system which causes them to alternately speed up and slow down. An axial shaft (5) attached to one rotor and passing through the other rotor contains a thrust bearing (10) to prevent the rotors from moving apart. The rotor vanes and disk-shaped end plates (1,6) which contain cooling means divide the cylindrical cavity into four chambers in which intake, compression, explosion and exhaustion occur. A passageway (39,39') containing an adjustable, pressure-sensitive valve (40) vents the compression chamber to the intake chamber to allow the compression ratio to be varied and to provide for a greater compression ratio than expansion ratio.

Abstract: A rotary internal combustion engine, has an engine block defining a drum-shaped combustion chamber. A rotatable propeller shaft extends axially through the chamber. First and second paddle and hub devices are freely rotating on the propeller shaft at least substantially sealingly in the chamber, each of the paddle and hub devices having first and second paddles that are fixed diametrically opposite each other with a hub therebetween. The hubs cooperate with each other so that the first paddle and hub device can also rotate relative to the second paddle and hub device, the hubs of the first and second paddle and hub means having end portions respectively extending from axially opposite ends of the chamber.

Abstract: A rotary piston engine (20) is shown which includes a housing (22) having a cylindrical working chamber with inlet (56) and exhaust (54) ports. First and second piston assemblies (30 and 32) each of which includes at least one pair of diametrically opposed pistons (30A and 30B, and 32A and 32B) are located in the working chamber. Backstopping clutches (44 and 46) limit rotation of the piston assemblies (30 and 32) to one direction (42). Piston assemblies (30 and 32) are connected to the engine output shaft through a differential (78) and non-circular gear sets (74 and 76), each of which gear sets includes a tear-drop shaped gear (74A and 76A) and heart shaped gear (74B and 76B). When the cusp of the tear-drop shaped gear engages the recess in the heart shaped gear, the tear-drop shaped gear is prevented from rotating. The piston assemblies rotate intermittently whereby pistons of the stopped assembly are trailing pistons during portions of the power and intake phases of engine operation.

Abstract: A shaft (5) is driven in the rotary piston machine. The torque is transmitted via first cam rings (7), connected to it, to rolling bodies (9) supported in cages and from these rolling bodies to second cam rings (8), which drive the rotation bodies (3) of the rotary piston machine. The cam rings (7, 8) and the rolling bodies (9) are, in this case, partially provided with bevel-wheel teeth and partially with cam track teeth (FIG. 3 ). The rotary piston machine can also be used as an engine and is characterised by a particularly high efficiency.

Abstract: A rotation piston internal combustion engine has a substantially stationary housing defining a plurality of blind holes, and a rotor rotatably mounted within the housing for rotation at a substantially uniform velocity about an axis. A hub has four pistons and is rotatably mounted within the rotor for rotation about the axis at a non-uniform velocity. Four crankshafts are each rotatably mounted through a respective rib of the rotor and coupled to a respective gear wheel so that the gear wheel rotates with the crankshafts. A ring gear is coupled to the housing for engaging the gear wheels to permit rotation of the gear wheels relative to the housing. The ring gear has a plurality of apertures having a second diameter, each corresponding in position to a respective blind hole in the housing.

Abstract: A scissor-action piston rotary engine. The engine comprises a cylinder with a pair of rotors which are supported by a mutual main shaft and rotatably housed inside the cylinder. Each of the rotors has a pair of diametrically opposed sector shape pistons with the pistons diametrically intermediately arrayed to form a circular piston-space-piston arrangement. Two pairs of planet gears each with eccentric pins and cranks are linked to the rotors through planet gear housings. Two sun gears with the gear ratio of 2:1 are drivingly engaged to the planet gears. Two pairs of torque transmission arms which are axially offset and diametrically apart by 90.degree. are mounted on the main shaft. Four distributive arms are provided to link the eccentric pins with the torque transmission arms.

Abstract: A pressurized fluid-driven engine includes an engine chamber defined by a housing having one or more endplates which include serpentine channels for the flow of temperature-regulating fluid. Preferably, each endplate has a pair of channels that each has a scroll pattern. The temperature-regulating fluid may be the same fluid that is employed in driving the engine. The fluid is utilized both to preheat the engine and to cool the engine during use. The engine may be coupled to a generator for the production of electrical energy.

Abstract: Improved rotary engines and related rotary mechanisms have a pair of interfitted rotor discs with peripheral rotor heads that define a circular series of chambers in a housing. A non-circular gear is secured to the output/control shaft of each rotor, with the non-circular gears meshing with complementary non-circular gears provided on a common power output shaft. The non-circular gears are configured and oriented such that the distance from its output/control shaft at which one of the non-circular gears engages the complementary non-circular gear on the common power output shaft never simultaneously equals the distance from its output/control shaft at which the other non-circular gear engages the corresponding complementary non-circular gear on the common power output shaft.

Abstract: An alternating velocity rotary engine including a pair of pistons 1 connected to main shaft 6 through an alternating velocity mechanism 5 in which the mechanism employs for each piston a rotary drive gear element 11 which cooperates with a further gear element 12, an eccentrically disposed drive element 15 on the rotary gear element and means 4, 16 and 17 drivingly to connect the piston 1 to the drive element 15.

Abstract: A rotary internal combustion engine including a plurality of toroidal cylinders and toroidal pistons that are slidably carried within the cylinders. Combustion of an air-fuel mixture within the respective cylinders provides a series of circumferential power strokes for more efficient operation. The pistons and cylinders are carried by a pair of side-by-side, coaxial drive rotors, the output power pulses of which are transmitted through a drive clutch and planetary gear assembly to an engine output drive shaft. The drive clutch and planetary gear assembly includes four overrunning clutches and a planetary gear train to smoothly transmit the successive intermittent engine power strokes to the output drive shaft.

Abstract: A rotary engine including a piston assembly having first and second adjacent hubs. The hubs are rotatably mounted in a housing about a common axis where they are coupled to two drive shafts that are concentrically arranged about the common axis. A first and second set of pistons extend radially outwardly from the first and second hubs, respectfully. Each piston head from the second set of piston heads is circumferentially spaced from a piston head of the first set to form a fuel expansion chamber therebetween. The distance between the rotational axis of the hubs and the outer peripheral surface of the piston heads is at least three times the distance between the outer peripheral surface of the piston assembly hubs and the outer periphery of the piston heads, i.e., the radial depth of the expansion chambers.

Abstract: A rotary piston engine is shown which includes a housing (22) having a cylindrical working chamber with inlet (88) and exhaust (86) ports. First and second piston assemblies (30 and 32) each of which includes at least one pair of diametrically wedge-shaped pistons (30A and 30B, and 32A and 32B) are located in the working chamber. The piston assemblies rotate in the same direction at recurrently variable speeds so that one pair of diametrically opposite sub-chambers decreases in volume while the other pair increases in volume. In FIG. 1, four eccentric elliptical gear sets (60, 62, 64 and 66) interconnect coaxial piston shafts (38 and 36B). Compound eccentric elliptical gear sets (106 and 108) for interconnection of the piston shafts are shown in FIG. 7. Gear trains of large effective eccentricity are employed such that during the power phase of engine operation the trailing piston rotates only a small amount for efficient engine operation.

Abstract: An oscillatory rotating engine has a pair of rotors each defining a pair of diametrically opposed radially extending lobes, the rotors are mounted for rotation within a cylindrical housing and sealingly engage the walls of the cylindrical housing to define four working chambers. Each rotor is drivingly connected to an output shaft by means of an internal/external gear train, the external gear being mounted for rotation with the rotor and the internal gear being mounted rotatably with respect to the output shaft for orbital motion in mesh with the external gear. Each internal gear has an arm with a longitudinal slot which is engaged by a pivotal block which will act to rotationally restrain the internal gear and impose a periodic variation in velocity on the gear train, this periodic variation in velocity for the two rotors being out of phase so that the working chambers are alternately expanded and reduced in volume.

Abstract: In the concentric rotary pressure fluid machine which can either be an engine, motor, pump or compressor, the four identical elliptical gears (54, 54, 100, 100) actuate the relative rotary motions of two identical and coaxial rotors (60, 60') characterized by varying angular accelerations with respect to time equal in magnitude but opposite in direction. Consequently, the four arcuate variable-volume-chambers ( 1, 2, 3, 4) bounded by the arcuate rotor vanes (70, 70, 70', 70') analogous to opposed pistons of the piston-cylinder machine, and the rotor cylinders (80'), axial spacer (110), hollow cylindrical shell (20) and two transverse end plates (32, 32), functioning as cylinder block symmetrically and alternately enlarge and shrink in volumes in the prescribed manner as they revolve around their common axis.

Abstract: A radial piston rotary device is disclosed having a gear drive mechanism to convert the varying speed of rotating piston shafts into uniform rotational motion of a power shaft. The rotary device has a pair of radial pistons, each having diametrically opposed piston portions and each connected to concentric piston shafts. Each of the pistons is mounted within a housing so as to rotate about the longitudinal axis of the piston shafts. The drive system to convert the motion of the piston shafts to uniform rotational motion includes irregular gear sets operatively connected to each of the piston shafts. Each of the irregular gear sets has gear wheels with gear teeth segments extending over only a portion of their peripheries and also having different pitch diameters. The gear wheels are connected so as to rotate together, along with one of the radial pistons, as a unit. The other radial piston is connected to a separate irregular gear set having an identical construction.

Abstract: A rotary engine includes separate compressor and combustion sections which are interconnected. Each section includes a cylinder formed with a cylindrical working chamber containing a pair of pistons rotatable about the cylinder axis. The pistons are attached by cylindrical hubs to coaxial shafts extending from an end of the cylinders, which shafts are interconnected by generally elliptical gear means to provide for rotation of the pistons at periodically variable speeds such that sub-chambers of periodically variable volume are provided. The outer free edges of the pistons and attached hubs are recessed, and seal means are located in the recesses to prevent gas leakage between opposite sub-chambers. The combustion section cylinder is provided with intake and exhaust ports in the cylinder wall and, for spark ignition, with a spark plug. For compression ignition, fuel injector means are provided in place of the spark plug.

Abstract: A rotary pump device comprises planet gear devices 4, 5 each composed of a center gear 6, 7, planet gears 8, 9 and an inner toothed annular gear 10, 11, all being non-circular gears, and a mechanism for rotationally moving a plurality of rotary pistons 18, 19 in an annular cylinder 17 at periodically variable speed in synchronism with variable speed orbital movements given to planet shafts 20, 21 by said planet gear devices.

Abstract: A rotary apparatus uses vanes which oscillate with respect to one another, while simultaneously rotating within a chamber, to compress a gas or pump a liquid. The oscillating motion results from interaction of at least a single coupled pair of elliptical drive members. When the driver elliptical member is rotated at a constant angular velocity, it causes the driven elliptical member to rotate with a varying angular velocity. As the driven elliptical member is connected to at least one vane, that vane also rotates with a varying angular velocity. In a preferred embodiment, two pairs of meshing elliptical gears drive four vanes with an oscillating and rotating motion.

Abstract: A compressor/pump engine (10) is provided which includes a wall (12) defining a toroidal cylinder (22). A pair of flywheels (36 and 38) are mounted for rotating with respect to said cylinder (22) on a central axis thereof and with respect to each other. Each of the flywheels carry at least a pair of pistons (50) mounted at selected locations, and preferably 180 degrees apart. These pistons (50) cooperate to define compressing/pumping and inlet chambers during rotation of the flywheels. A fluid for compressing/pumping is admitted into the inlet chambers and then removed from the compressing/pumping chambers during operation. A device (70) is also provided to control the speed of revolution of the pistons during the compressing/pumping cycling such that the compression/pumping and inlet chambers are defined at selected locations during a cycle of the compressor/pump.