Abstract: Described herein is a mechanism including: a driving shaft comprising an eccentric crank and an arm part extending radially from the driving shaft, the arm part of the driving shaft comprising a piston housing; a piston in the piston housing; an eccentric lever bushing comprising an arm part extending radially therefrom, a cylindrical outer surface and a cylindrical hole, wherein the cylindrical hole is rotatably attached to the eccentric crank, wherein an axis of the cylindrical hole and an axis of the cylindrical outer surface are parallel and offset; wherein the piston is configured to apply a torque on the eccentric lever bushing by pushing the arm part of the eccentric lever bushing. The driving shaft may further comprise a channel configured to apply fluid pressure on the piston. This mechanism may be used in a device such as a star scroll compressor.

Abstract: A prime mover and a plurality of hydraulic actuators, a hydraulic machine having a rotatable shaft in driven engagement with the prime mover and comprising working chambers, a hydraulic circuit between working chambers of the hydraulic machine and the hydraulic actuators, each working chamber of the hydraulic machine comprising a low-pressure and high-pressure valves regulating the flow of hydraulic fluid between the working chamber and a corresponding low-pressure manifold and a high-pressure manifold. The hydraulic machine being configured to actively control the low-pressure valves of the working chambers to select the net displacement of hydraulic fluid by each working chamber on each cycle of working chamber volume, and thereby the net displacement of hydraulic fluid by the working chambers, responsive to a demand signal, wherein the apparatus further comprises a controller configured to calculate the demand signal in response to a measured property of the hydraulic circuit or actuators.

Abstract: An apparatus comprising a synthetically commutated machine with one or more services, a prime mover coupled to the machine, a hydraulic circuit extending between the services and hydraulic loads to fluidically connect the services to the hydraulic loads such that groups of one or more services are fluidically connected to respective groups of one or more hydraulic loads. The apparatus configured such that the flow of hydraulic fluid to or from a group of services of the machine is controlled responsive to measuring a flow rate and/or pressure requirement of the hydraulic loads which are fluidically connected to the services, or receiving a demand signal indicative of a demanded pressure and/or flow rate based on a pressure and/or flow demand of hydraulic loads which are fluidically connected to the services.

Abstract: Disclosed is a paired compress gas energy power system and power method. The paired compress gas energy power system includes: a paired compress gas energy storage device having a high pressure air container and a low pressure air container, the high pressure air container is filled with a high pressure gas, the low pressure air container is filled with a low pressure gas; a paired compress gas energy engine, respectively connected to the low pressure air container and the high pressure air container; and a power device connected to the rotary shaft of the paired compress gas energy engine, the power device is driven by the paired compress gas energy engine. The invention converts the paired compress gas energy into the mechanical torque energy through the paired compress gas energy engine to drive the power device to work, or to drive the generator to generate electric energy.

Abstract: A rotary compression mechanism includes: a shaft attached to a casing; a drive cylinder rotatably supported on the shaft; a rotor provided inside the drive cylinder; a transfer mechanism connecting the drive cylinder and the rotor in rotational motion at a constant speed; and a partition plate dividing a space defined between an inner periphery of the drive cylinder and an outer periphery of the rotor. The rotor has a second rotation center which is eccentric with respect to a first rotation center of the drive cylinder such that the outer periphery of the rotor is in contact with the inner periphery of the drive cylinder at a contact portion. The partition plate has a structure by which one end of the partition plate is let in and out in a vicinity of the inner periphery of the drive cylinder or in a vicinity of the outer periphery of the rotor.

Abstract: A rotary engine has a top housing with suction and exhaust ports and bottom housing arranged to receive a crank assembly and a cam assembly. The crank assembly has a crank plate rotatably placed above the bottom housing and a set of semi circular cranks provided at the top surface of the crank plate to travel along with the crank plate. The cranks are positioned opposite to each other and are aligned to the crank plate. A crank shaft arranged to pass through the top housing and bottom housing drive along with the crank plate. The cam assembly has a set of cams placed above the crank plate and arranged to pivot through pivot pins. The cams and the cranks revolve to form an eccentricity with the outer cavity ring and inner cavity ring.

Abstract: A rotary engine having a main block with a cylindrical cavity, a rotor having at least one divisor having at least one ring for rotably engaging a main axis. The divisors having an edge slidably abutting the internal surface of the cylindrical cavity. The rotor having at least one bearing for engaging the cams of the main axis. The rotor having at least one transversal fissure having a trapezoidal profile and a transversal cylindrical opening. The transversal cylindrical opening having at least one pivoted sliding guide for movably holding the divisors at an angle of 90 degrees between the edge the divisors relative to the internal surface of the cylindrical cavity during a complete 360-degree turn of the rotor. The rotor having a planetary gear interfering with a stationary satellite gear of the main axis and having a diameter wider than diameter of the stationary satellite gear.

Abstract: In one aspect, described is a rotor for a rotary internal combustion engine where a first face seal biased axially outwardly away from the first end face has opposed curled ends abutting a first seal element of a respective one of the adjacent apex seal assemblies, and a second face seal biased axially outwardly away from the second end face has opposed curled ends abutting a second seal element of a respective one of the adjacent apex seal assemblies.

Abstract: An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees.

Abstract: One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial and radial surfaces of the drive and idler gear. The cover housing may be outfitted with one pressure relief channel or with two pressure relief channels of different geometric sizes and with different actuation pressures. The drive and/or idler gear may have dimples fashioned on an axial surface thereof, and lubricant troughs may be fashioned at various locations in the main body and/or the cover housing to reduce wear within the pump.

Abstract: Rotary expansible chamber (REC) devices having one or more working-fluid ports that are adjustable, for example, in size or location. In some embodiments, the variable port mechanisms can be used to control any one or more of a plurality of operating parameters of a REC device independently of one or more others of the operating parameters. In some embodiments, the REC devices can have a plurality of fluid volumes that change in size during rotation of the REC device, and that transition to a zero volume condition during the rotation of the REC device. Systems are also provided that can include one or more REC devices. Methods for controlling various aspects of REC devices, including methods of controlling one or more operating parameters, are also provided.

Abstract: An orbital engine with a first outer generally tubular body with a first axis, and a second generally tubular inner orbiter body with a second axis, the second inner body being moveable within the first outer body. The first and second axes are parallel, but not colinear. The second inner body revolves, but does not rotate, within the first outer body Vanes extending generally radially relative to both the inner and outer bodies define multiple chambers in the space between the outside of the inner body and the inside of the outer body. The vanes reciprocate relative to both the inner and outer bodies, and no vane traverses the entire inner surface of the outer body. When fitted with ports in the outer body and valves, the orbital engine may be implemented as an internal combustion engine, gas compressor, liquid pump, air motor, blower, fan or turbine, etc.

Abstract: Method and apparatus for oil-less engine with a revolving rotor are shown. Oil-less engine allows manufacturers to build environmentally safer oil-free engines, with fewer engine parts and at reduced costs of manufacturing. In one embodiment, the present invention is a method of internal combustion in an oil-less engine casing. The method is, revolving a multi-angular rotor around a center point to sequentially combust with each of a plurality of fireheads, revolving in a manner that each side of the multi-angular rotor successively achieves a top dead center position with a respective firehead. A firehead is a combination of a sparking means, a fuel injector and an air injector.

Abstract: An orbital engine with a first outer generally tubular body with a first axis, and a second generally tubular inner orbiter body with a second axis, the second inner body being moveable within the first outer body. The first and second axes are parallel, but not colinear. The second inner body revolves, but does not rotate, within the first outer body Vanes extending generally radially relative to both the inner and outer bodies define multiple chambers in the space between the outside of the inner body and the inside of the outer body. The vanes reciprocate relative to both the inner and outer bodies, and no vane traverses the entire inner surface of the outer body. When fitted with ports in the outer body and valves, the orbital engine may be implemented as an internal combustion engine, gas compressor, liquid pump, air motor, blower, fan or turbine, etc.

Abstract: An enclosed compressor includes a compression element configured to compress a working fluid, a casing and a fixing member. The casing has a substantially cylindrical shell plate and houses the compression element. The fixing member is welded to the shell plate. The compression element is fixed to the fixing member by at least six fastening bolts.

Abstract: A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the first fluid. The fluid motor and pump are sized so that a predetermined ratio between the two fluids is maintained regardless of changes in pressure and flow rate of such first fluid.

Abstract: A transmission system for transmitting a rotary motion input to a rotary motion output utilizing hypocycloid motion multiplication is disclosed. The system comprises an input mechanism, at least one hydraulic transmission means, an output mechanism and an output bladder linkage. The input mechanism includes a plurality of rollers that each capture at least one arcuate linkage against an inside surface of a cylindrical hub, causing the linkage to rotate as the roller traverses thereacross and compress one of a plurality of input bladders. The compressed input bladders cause an output bladder to expand to drive the output mechanism in reciprocal linear motion, which the output mechanism converts to rotational motion at the rotary motion output. The output mechanism can be located proximate to, or distal from, the input mechanism.

Abstract: The rotary-piston machine consists of two operating units. The first one comprises a horizontal operating cylinder (1) with cylindrical shaft (5), connected to the main shaft (4) and sealed with rings to the walls of the cylinder (1). The shaft (5) has a first friction element (9) pressed against the internal wall of the cylinder (1). The second unit comprises a cylindrical body (15) mounted to the main shaft (4) with a firmly connected to its circumference inner ring (16) of a bearing with an outer ring (17) provided of an articulated joint (18) connected to a frame (19) that is connected to a valve (13) which press a second friction element (14) to the shaft (5). Both units move in synchronization.

Abstract: An internal combustion rotary engine using vanes to create separate combustion chambers within the engine and capable of performing all four strokes of the Otto cycle (intake, compression, combustion and exhaust) in each separate combustion chamber. Each Otto cycle is completed in a 180-degree rotation with all four strokes of the Otto cycle being completed in 720 degrees. An intake and exhaust valve system tightly controls the flow of the air/fuel mixture into each separate combustion chamber.

Abstract: The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working chambers that are connected to at least one inlet connection and at least one outlet connection via the commutation section that comprises a rotary slide valve and a valve plate. It is endeavoured to provide such a hydraulic machine that requires only little space. For this purpose, a sealing is arranged between the rotary slide valve and the housing.

Abstract: The invention relates to a rotating piston machine, especially a compressor, a pump or a motor, comprising a rotating piston which defines working chambers with variable volumes and is located in a cylinder (1) provided with two lateral walls and a curved jacket. Said piston can be rotated about two parallel rotational axes (7, 8), vertically in relation to the lateral walls of the cylinder, and can be displaced in two directions both vertically in relation to each other and in relation to the parallel rotational axes. To this end, the piston (2) is provided with two guiding shafts (71, 81) having parallel rotational axes, said guiding shafts (71, 81) being provided with guiding elements (5, 6), preferably slides or journals, in a vertical direction in relation to the rotational axes (7, 8), on which the piston (2) is displaceably positioned by means of sliding elements (3, 4), preferably grooves or liners.

Abstract: A blade moves backward/forward to enter four different states, namely a first state in which the tip thereof is in sliding contact with the internal peripheral surface of an external side cylinder part, a second state in which the tip is positioned in the cutaway portion of a ring-shaped piston to thereby place only an external side cylinder chamber at rest, a third state in which the tip is positioned in the cutaway portion of an internal side cylinder part to thereby place only the external side cylinder chamber and an intermediate cylinder chamber at rest, and a whole rest state in which the tip is positioned in a blade groove to thereby place all of the cylinder chambers at rest.

Abstract: The invention relates to heat engines and more specifically to positive displacement internal combustion engines, and is particularly concerned with rotary and oscillating spherical engines i.e. engines, in which piston executes rotary/oscillating motion and combustion chamber and principal engine's parts that converts gas pressure into rotary movement assume general form of sphere. The invention provides the optimal, “canonical” form for the two stroke rotary and oscillating spherical engine of unique strength and compactness.

Abstract: The invention relates to a power generating unit, comprising an electric generator with a rotor; at least one hydrostatic motor for the powering of the electric generator, wherein at least one of the hydrostatic motors is constructed as an internal gear motor; the rotor of the electric generator surrounds the internal gear motor concentrically, wherein the rotor combs a pinion via an internal gearing, said pinion being driven at least indirectly by the internal gear motor; a starting device is allocated to the internal gear motor.

Abstract: The present invention relates to a rotary internal combustion engine that extracts power from expansion gases supplied to a rotary power-extraction assembly, and related methods. The disclosed engines include a compressor assembly, a combustion assembly, and a rotary power-extraction assembly. The compressor assembly supplies a compressed charge to the combustion assembly. The combustion assembly initiates combustion and discharges expansion gases to the rotary power-extraction assembly. A rotary power-extraction assembly can be configured to include an annular chamber where expansion gases drive a power rotor.

Abstract: The invention relates to a rotary screw machine of volume type comprising a body (30) having a main axis X, two members (10, 20), wherein a first one (20) surrounds a second one (10). Said first member (20) is hinged in said body (30) and is able to swivel on itself about its axis (Xf), aligned with said main axis X, according to a swiveling motion, whereas the axis (Xm) of said second member (10), revolves about the axis of said first member (Xf) according to an revolution motion having said length E as a radius. The machine further comprises a synchronizer (34, 36, 38, 40) synchronizing said swiveling motion and said revolution motion, such that a working medium performs a volumetric displacement in at least one working chamber (11) delimited by an outer surface (22) of said first member (20) and a inner surface (12) of said second member (10).

Abstract: A rotary mechanism (10) has an annular (chamber 12) defined by an inner wall (16) of housing (11). A symmetrical two lobed rotor (15) has opposing side faces (21a, 21b) a longitudinal axis between apices (22). A drive shaft (50) eccentrically rotates rotor by a block (51) and slot (52) receprocating arrangement and a second supporting means (53). The centre of the rotor follows a circular orbit in the chamber (12). The apices (22) continuously sweep the inner wall (16) creating cavities (25) of successively increasing and decreasing volumes with associated fluid inolet and exhaust port (31, 35).

Abstract: In order to more effectively use the constructional volume of a volume screw machine of rotary type, a plurality of sets (80, 70; 60, 50) of female elements having an inner screw surface and of male elements having an outer screw surface is provided, wherein in each set a rotary motion of at least one element is created. If the motion of elements in different sets (80, 70; 60, 50) is synchronized, one can provide for a dynamically balanced machine.

Abstract: A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of the driving rotor and the driven rotor are configured such that seals between the inlet side and the discharge side of the pump are formed between only the leading surfaces of the teeth of the driving rotor and the trailing surfaces of the teeth of the driven rotor.

Abstract: The invention relates to an axial piston engine with a filling pump integrated in a receiving bore of the axial piston engine, which filling pump comprises a gerotor set with an externally toothed inner ring and an internally toothed outer ring and also an inner thrust plate and an outer thrust plate. The two thrust plates enclose the gerotor set between them and, on their surfaces facing away from the gerotor set, are in each case supported via a pressure field seal, which surrounds the pressure field regions formed in the thrust plates, in such a way on the housing walls axially enclosing the filling pump that lateral play in the form of axial mobility of the filling pump is guaranteed.

Abstract: The aim of the invention is to provide a simple, smoothly running pump, especially a slurry pump, preferably for concrete, which comprises a driven rotor (4) rotating inside a housing (2). According to the invention, the rotor (4) is configured as a polygonal, prismatic body wherein at least the connecting lines of the corners of the base form an equilateral polygon. The rotor performs a rotational movement about its center axis on an orbit, the longitudinal edges of the prismatic body (4?) touching the longitudinal inner wall surface (2?) of the housing (2).

Abstract: An apparatus for facilitating combustion in a rotary engine with planetary rotors orbiting inside a housing containing a main rotor. In various embodiments, the planetary rotor has a multi-faceted face that engages a bridge during the transition from the compression cycle to the combustion cycle with the bridge and face forming a dynamic seal; the planetary rotor has a face engaging a bridge during the transition from the compression cycle to the combustion cycle such that the bridge and face have a gap that allows gas flow from the trailing volume to the leading volume and the gap is sufficiently small to quench flame propagation from the leading volume to the trailing volume; and/or the face of the planetary rotor opposite a fuel injector has a pocket that allows the fuel cloud to expand without impinging or wetting the face of the planetary rotor.

Abstract: The present invention provides an oil pump in which eroding of the inside of the pump due to cavitation and erosion is prevented by minimizing the pressure change in a fluid when inter-tooth spaces formed by an inner rotor and an outer rotor transport the fluid from the intake port to the discharge port. The oil pump comprises: an inner rotor; an outer rotor; an intake port; a discharge port; a transfer side partition part formed between a terminal end of the intake port and a leading end of the discharge port; and a shallow groove which is formed in the transfer side partition part, and which communicates with the discharge port but does not communicate with the intake port. The shallow groove does not intersect with the cell on the transfer side partition part, and is positioned farther inward than the circular locus of the gear bottom parts of the inner rotor.

Abstract: A rotary fluid machine includes a first rotation mechanism and a second rotation mechanism. Each of them includes a cylinder having a cylinder chamber and an annular piston which is contained in the cylinder chamber and divides the cylinder chamber into an outer working chamber and an inner working chamber. The cylinder goes rotates around the piston. The first rotation mechanism and the second rotation mechanism are arranged to be adjacent to each other with a partition plate sandwiched therebetween. The cylinder of the first rotation mechanism and the cylinder of the second rotation mechanism are arranged such that one of the cylinders is provided at one side of a partition plate and the other is provided at the other side of the partition plate. Each of the first rotation mechanism and the second rotation mechanism is provided with a compliance mechanism for reducing a gap that occurs between the cylinders in the axial direction of the drive shaft.

Abstract: A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the first fluid. The fluid motor and pump are sized so that a predetermined ratio between the two fluids is maintained regardless of changes in pressure and flow rate of such first fluid.

Abstract: The double-acting type orbiting vane compressor comprises an orbiting vane having upper and lower circular vanes formed at the upper and lower surfaces of a vane plate of the orbiting vane, respectively, the orbiting vane being attached to a crankshaft rotatable by a drive unit, an upper compression unit having the upper circular vane of the orbiting vane disposed in an upper cylinder, and a lower compression unit having the lower circular vane of the orbiting vane disposed in a lower cylinder. As the orbiting vane performs an orbiting movement in the upper and lower cylinders, refrigerant gases introduced into the upper and lower cylinders through inlet tubes respectively formed at the upper and lower cylinders are compressed, and are then discharged out of the upper and lower cylinders through outlet ports respectively formed at the upper and lower cylinders.

Abstract: For pumps, compressors, and air or hydraulic motors with multiple cylinders such as swashplate or nutating type pumps and compressors with axial pistons arranged about a central axis, a orbit valve is connected through an eccentric and bearing to the shaft and caused to orbit around an axis of the shaft by rotation of the shaft. Grooves in the orbit valve surface alternately connect a port in each cylinder with a fixed intake and an exhaust port in the valve plate ties for optimal performance without depending on pressure differential otherwise needed to open and close passive flapper or poppet-type valves. The orbiting motion provides direct acting valve action for intake and exhaust functions with much slower relative motion and far less friction than a rotating valve of similar size.

Abstract: A rotary combustion engine includes a peripheral housing, a front housing plate, a rear housing plate, a piston, and an eccentric shaft, where the piston rotates to form three working spaces separated from each other by the tips of the piston. Shaft seals and piston seals seal off the oil-carrying interior space of the internal combustion engine, and the piston is sealed off against the front and rear housing plates by arcuate strips, which are bounded radially on the inside by an envelope curve. The gas forming in the working space during the combustion phase is under high pressure. Some of this gas leaks around the arcuate strips and flows inward along the flat surfaces of the front and rear plates by way of ring-shaped channels in the piston, thus arriving in recessed areas inside the envelope curves, from which it is then escapes through vent channels.

Abstract: A balanced rotary cycling machine suitable for use as an internal combustion engine, compressed gas or steam engine, compressor or pump is disclosed herein. The rotor assembly consists of four articulating pistons where the opposite pistons are inter-linked with each other by pivoted rods comprising a parallelogram mechanism and therefore eliminating a need for pivots between pistons. The rotor assembly rotates inside or outside of a circular or non-circular stator depending on the configuration chosen. A variety of mechanisms for shape deformation of four piston assembly during its rotating cycle is also disclosed herein, as well as detailed descriptions of preferred embodiments, including a four cycle internal combustion engine with circular stator, marine engine with polymer parts and a four cycle automobile rotary engine with conventional oil pan. In addition, a method of operation of external rotary combustion engine, employing a high-pressure compressor and an external combustion chamber, is disclosed.

Abstract: A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the first fluid. The fluid motor and pump are sized so that a predetermined ratio between the two fluids is maintained regardless of changes in pressure and flow rate of such first fluid.

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: A screw extruder and gear pump arrangement for highly viscous media includes a screw shaft and a gear pump operatively coupled to the screw shaft. A planet carrier is operatively engaged with at least one rotatably mounted planet gear, a first functional element that is cooperatively engaged with planet gear as a sun wheel, and a second functional element that is cooperatively engaged with the planet gear as an outer ring. One of the first functional element or the second functional element includes gear teeth for meshing with the planet gear and the other includes a sealing region for bearing in a sliding and sealing manner over part of the circumference and length of the planet gear. A pump casing surrounds the planet carrier.

Abstract: In a rotary piston engine in trochoidal design with a rotor housing, made of light metal, and with side parts, which are made of light metal, it is provided that the bearing bodies are connected in an area, in which the maximum gas pressures develop, by means of tie rods, which are oriented radially in relation to the bearing body, to a support element, which rests externally on the side parts and the rotor housing.

Abstract: The invention relates to a rotary combustion engine comprising a driving eccentric ring (11) arranged between a non-rotary outer casing (1) and a non-rotary inner casing (3) for rotating a power shaft (5) situated inside the inner casing. In order to drive the eccentric ring, a combustion chamber arrangement (14, 15) is provided between the inner and the outer casing for burning a mixture of fuel and air supplied thereto, the power shaft (5) being provided with an eccentric element (8). In order to minimize the number of rotating components, a second eccentric ring (12) is mounted by means of a bearing (9) around the power shaft (5) inside the aforementioned inner casing (3), this second ring being coaxial with and fixed to the driving eccentric ring (11), and the eccentric ring arrangement (11, 12) being a substantially non-rotary unit that only performs an eccentric motion, which makes the power shaft (5) rotate.

Abstract: First pivot bodies are received for rotation in first recesses in the housing member. A piston member is mounted in a eccentric portion of the drive shaft such to orbit in operation. Second pivot bodies are received for rotation in second recesses in the piston member. Dividing vanes are inserted at their ends in slots, formed in the first and second pivot bodies in a free floating manner such to reciprocate in operation of the engine. These vanes define a number of combustion chambers. The ends of the vanes received in the first pivot bodies of the housing member perform pivoting movements and the ends received in the second pivot bodies of the piston members perform orbiting movements. Thus, only small frictions and wear at the vanes in and the pivot bodies occur and the engine can be designed with small dimensions.

Abstract: A hydraulic gerotor motor utilizing the holes surrounding the main assembly bolts together with interconnecting radially extending passages so as to allow for the transfer of fluid axially through the device from a single fluid input hole to an area 360° surrounding a valve.

Abstract: A displacement type fluid machine has a sliding contact portion between a cylinder 4 and a displacer 5 made into a predetermined section, and the cylinder and the displacer so contoured that when they are made concentric, the normal distance in the sliding contact section between the cylinder contour and the displacer contour may be smaller than that of the remaining section, thereby to decrease the radial gap to lower the internal leakage of the working fluid and to improve the performance and the reliability.

Abstract: A displacement type fluid machine which is easier to machine and assemble than a scroll type fluid machine and has high performance and low cost. A displacer is revolved in a cylinder having an inside wall formed by a curve such that a planar shape is continuous, whereby a working fluid is discharged through a plurality of discharge ports, there is provided a driving unit in which the orbiting radius of the displacer is variable along the shape of a movement line contact portion of the cylinder and the displacer.

Abstract: An internal combustion engine in combination with a rotary positive displacement fluid machine. The combination having a rotor eccentrically mounted in a casing with a plurality of vanes defining compartments within the casing which vary in volume as the rotor rotates. Each vane is connected to a linkage to cause the vane, during rotation of the rotor, to pivot radially outwardly such that the outermost extremity of each vane is constrained to follow closely the internal wall of the casing. The linkage being constrained to follow at least one track in a member rotatable upon the same axis as the casing. The machine being connected to an air inlet manifold of the engine, and to atmosphere, such that the rotor is driven by the pressure difference between ambient air and air at the inlet manifold. The machine also is operatively connected to an energy using device.

Abstract: In order to provide a displacement type fluid machine for reducing a fluid loss of a discharge process as much as that of a scroll fluid machine, easily prepared than the scroll fluid machine, in the displacement type fluid machine wherein a shaft is gyrated in a hollow cylinder whose section shape comprises a series of curves so that a working fluid is discharged from a plurality of discharge ports, a shaft angle &thgr;c of a compression process of each working chamber is given by the following algorithm: (((N−1)/N·360°)<&thgr;c≦360° (where, N is the number of threads).