Abstract: A first main back pressure supply port 55 and a first subsidiary back pressure supply port 56 are formed in a first sliding contact surface 5a of a first side member 5, the first main back pressure supply port 55 is formed in a groove shape in the first sliding contact surface 5a, and the first subsidiary back pressure supply port 56 communicates with the first subsidiary discharge port 54. A second main back pressure supply port 65 and a second subsidiary back pressure supply port 66 are formed in a second side member 6, the second main back pressure supply port 65 passes through the second side member in the axial direction and the second subsidiary back pressure supply port 66 is formed in a groove shape in a second sliding contact surface 6a.

Abstract: A vane pump is disclosed that includes a plurality of vanes and radial slots configured to provide a gap between the vane and the radial slot such that the vane has a different angular position relative to the direction of rotation in a radially extended position compared to an angular position in a radially-retracted position. The different angular positions provide different orientation of the arcuate surface of the vane tip portion with respect to the cam body inner surface, thus providing different fluid stop points on the vane tip portion arcuate surface.

Abstract: A generator having a coupling adapted to couple at least two fluid conduits together; an axial flow channel defined by the hose coupling and having an axis; a conductive coil in the hose coupling enveloping the axial flow channel; a rotor rotatable relative to the conductive coil and encircled by the conductive coil; a plurality of vanes coupled to the rotor and projecting radially toward the axis, but not intersecting the axis.

Abstract: A hydraulic energy conversion device includes a main body being an annular member having a central hole, an output shaft mounted in the central hole of the main body with a centerline extended perpendicular to the central hole; a fixing plate located at an end of the main body and provided with a plurality of passage holes; an outer cover located at another end of the main body opposite to the fixing plate and having a central opening for the output shaft to outwardly extended through the outer cover; and a plurality of vanes circumferentially spaced on the output shaft to locate in a space defined between the main body, the fixing plate and the outer cover. The hydraulic energy conversion device is mounted in a hydraulic shock absorber to convert hydraulic energy into mechanical energy and output the same without hindering the hydraulic shock absorber from normal operation.

Abstract: The invention relates to a hybrid pump for delivering a liquid pump medium, comprising a rotor consisting of substantially non-elastic plastic, which is situated in the pump chamber and can rotate about a rotor axis. Said rotor has a base plate associated with the lower lateral surface of the pump chamber and several rotor parts that are spaced substantially at a uniform distance around the periphery, extend towards the opposite lateral surface of the pump chamber and are permanently connected to the base plate. A preferably curved rotor blade is pivotally hinged on the outer end of each rotor part, forming pump chambers of the rotor between neighboring rotor parts and rotor blades, said chambers being open towards the upper lateral surface of the pump chamber and the bases of said chambers being formed by the base plate of the rotor. The pump is characterized in that the bases of the pump chambers follow a concave arc, rising from the outer edge of the base plate inward towards the rotor axis.

Abstract: A device includes a ring having a tubular interior surface centred about an axis. The surface includes a plurality of axially extending, inwardly-projecting ridges. On opposite sides of each ridge is a first port and a second port. A rotor rotates in the ring about the axis. A plurality of vanes is mounted to the rotor body for rotation therewith and for radial extension and retraction relative thereto such that the surface can be swept by the vanes. The rotor and the ring are sealed to permit fluid communication into and out of the device only via the ports. The vanes retract and extend as the body rotates such that chambers are created which decrease in volume when in communication with the first ports and chambers are created which increase in volume when in communication with the second ports. A fluid pressure mechanism can cause vane retraction.

Abstract: A vane pump may include an oval fixed portion of which an outer circumference may be oval, a rotation ring that may be rotatably disposed outside of the oval fixed portion with a gap and in which blade slots may be formed in a predetermined depth along a circular interior circumference of the rotation ring at a predetermined interval from each other, blades of which one end thereof may be slidably inserted into the blade slots respectively and of which the other end slidably contacts an outer surface of the oval fixed portion, an elastic member coupled to the rotation ring and elastically pushing the blades towards the oval fixed portion, and a drive portion connected to the rotation ring and rotating the rotation ring such that oil may be sucked through an expanding space that may be formed between at least two of the blades and oil may be pumped through a shrinking space that may be formed between at least two of the blades.

Abstract: A two-stage rotary compressor having a compression mechanism including a single muffler housing member. The single muffler housing member at least partially defines an intermediate pressure discharge cavity and a discharge pressure discharge cavity. In one exemplary embodiment, the compression mechanism includes a cylinder block having a plurality of vanes positioned within slots formed in an inner cylindrical surface of the cylinder block. The slots are in fluid communication with the discharge pressure discharge cavity and receive discharge pressure working fluid to bias the vanes radially inwardly. In another exemplary embodiment, the cylinder block includes a plurality of passages for the delivery of working fluid to and from the cylinder block.

Abstract: A flow-controllable cell pump having a bearing element that may be positioned in a receiving shell of a pump housing such that the receiving shell may assume an operational connection with at least one of a bearing element, a pump chamber positioned between an inner rotor and a control slide valve. An outer rotor may be configured in the control slide valve, and suction kidneys may be arranged on both sides of the pump chambers in the pump housing. At least one pressure kidney may be offset on both sides of the pump chambers in the pump housing. The pressure kidney may be connected with a pressure connection socket, with a control slide valve arm configured on the control slide valve.

Abstract: A rotary engine configured to use compressed air or high pressure steam to produce power. It has a casing with two peripheral exhaust ports each adjacent to a flattened area, a rotor having three slotted pistons, and a center valve with two opposed inlet ports that provide high pressure steam or compressed air to the pistons. Each rotor revolution produces three power strokes. Furthermore, the volume of air used for a single cycle is reduced, as a result of the air traveling through its pistons. Also, the engine stops when the vehicle it powers is at rest, and a spring inside each piston causes its angled tip to contact the rotary chamber upon start up. In addition, it is inexpensive to manufacture, as there is not much tooling needed to make the rotary engine, and it has only four moving parts, its rotor and the three pistons attached to it.

Abstract: A pneumatic motor includes a shell, two covers, a cylinder and a rotor. The shell defines a space, at least one inlet in communication with the space and at least one outlet in communication with the space. Each of the covers defines at least one radial channel and at least one arched channel in communication with the radial channel. The covers are disposed in the central space of the shell while the radial channel is in communication with the inlet. The cylinder defines a central space and at least one inlet in communication with the central space. The cylinder is located between the covers so that the central space thereof is in communication with the arched channels of the covers and that the inlet thereof is communication with the inlet of the shell. The rotor includes a plurality of fins movably mounted thereon.

Abstract: A three-stage internal combustion rotary engine, comprised of: a compressor feeding compressed air to a combustor for compression, fuel injection, combustion, and expansion of gases which rotate the rotor. The combustor rotor generates torque and drives the compressor and afterburner rotors simultaneously. The afterburner receives the combusted gases and scavenged air from the combustor for secondary combustion and expels the exhaust gases. Each unit consists of a housing joined together on a common axis and a rotor with a shaft mounted in an eccentric position of the housing side-walls. The shafts are interconnected by splines. The rotors have radial blind slots which contain slidable, movable vanes fitted with half-round knobs on opposite sides, aligned with the top surface and fit in the hemispherical grooves on the interior side-walls of the housing. This maintains a permanent contact with the interior housing periphery, regardless of gas pressures and rotating speed.

Abstract: A pivoting vane rotary compressor includes a housing having a generally pear-shaped chamber. A rotor mounted within the chamber defines a main and constricted chamber regions. Reversible intake and exhaust ports alternately introduce air into and exhaust air from the chamber. The rotor carries pivotable vanes and a motor drives the rotor alternately in opposing first and second directions to open the vanes and define compartments that transmit the air through the chamber between the ports. Air introduced through one of the ports is compressed and discharged through the other port. A concentrator employs a pair of these compressors as well as associated filters and crossover valves.

Abstract: A rotary machine (10) comprises an inner housing (12) having valving means (14) which includes a shaft (15) for directing working fluid through the machine (10) and, an outer housing (16) within which the inner housing resides. A working chamber (18) is defined between the inner and outer housings (12 and 16). A plurality of gates (20) are supported by the inner housing and are swingable along their respective longitudinal axis between a sealing position in which the gates form a seal against surface (22) of outer housing (16) and a retracted position in which the gates (20) lie substantially against surface (24) of the housing (12).

Abstract: A machine that is a self regulating rotor with a set of cups or vanes that are pivotally attached about a central axis such that they form a closed three dimensional shape when closed, and when rotated into an open orientation form an S-shaped rotor, when viewed as a horizontal cross section, a cup shaft to which each cup is attached, such that the cup can pivot or rotate from a closed shape to an open S-shaped rotor, end plates through which cup shafts are pivotally supported, a central shaft to which end plates are attached, a rotational energy connecting element attached to the cup shafts, that control rotation of cup shafts, a rotational speed sensor, and a braking device.

Abstract: A rotor device is provided for converting the energy of a flowing fluid, such as air or water, into mechanical energy. The device comprises a rotor mounted within a housing. Two or more vanes having inner and outer ends extend parallel to the axis of the rotor and are movable inwardly and outwardly between retracted and extended positions radially with respect to the cylindrical side wall of the rotor within slots therein The vanes have side shoulders which slide in corresponding guide slots in the end of the rotor body. The outer ends of the vanes are positioned adjacent to the inner wall of the housing and the vanes are spaced preferably equally from adjacent vanes about the rotor such that there is always at least one vane positioned between fluid inlet and outlet ports of the housing.

Abstract: A rotor device is provided for converting the energy of a flowing fluid, such as air or water, into mechanical energy. The device comprises a rotor mounted within a housing. Two or more vanes having inner and outer ends extend parallel to the axis of the rotor and are movable inwardly and outwardly between retracted and extended positions radially with respect to the cylindrical side wall of the rotor within slots therein The vanes have side shoulders which slide in corresponding guide slots in the end of the rotor body. The outer ends of the vanes are positioned adjacent to the inner wall of the housing and the vanes are spaced preferably equally from adjacent vanes about the rotor such that there is always at least one vane positioned between fluid inlet and outlet ports of the housing.

Abstract: A rotary pump includes a casing having a rotator rotatably received therein and a shaft fixedly extends through the rotator. The shaft is located eccentrically in the casing. An inlet and an outlet are defined through the casing and a receiving area is defined longitudinally in an outer periphery of the rotator. A pushing assembly has an end pivotally received in the receiving area and the other end of the pushing assembly either rotatably contacts an inner periphery of the casing or is either received in the receiving assembly during the rotation of the rotator to suck liquid from the inlet or push liquid out from the outlet.

Abstract: A hydraulic vane machine has a rotor, in which several vanes are arranged radially movable, and a stator having a stator bore, whose wall is made as a guiding contour on which the vanes bear. It is intended to prolong the life of such a machine, even when the machine is operated with a poorly lubricating hydraulic fluid, such as water. For this purpose at least one vane has a wearing surface on the end bearing on the guiding contour. Further, a channel arrangement is provided between high pressure and low pressure sides of the vane, which channel is blocked as long as the wearing surface has a predetermined thickness, and opened when the wearing surface is thinner than the predetermined thickness.

Abstract: A liquid-sealed vane oscillator includes a housing defining a cavity corresponding to part of a virtual annulus centered around, and extending at least 180.degree. about, an axis of rotation and delimited by first and second ends. A vane is mounted rotatably within the cavity. The vane includes a first seal and a second seal carried with the vane and deployed so as to subdivide the cavity into a first chamber of variable volume between the first end and the first seal, a second chamber of variable volume between the second end and the second seal, and an intermediate volume between the first seal and the second seal. At least one port is provided in fluid communication with each of the first and second chambers. The oscillator also has an axial shaft, penetrating and extending from the cavity, which is mechanically coupled to the vane so as to allow exchange of mechanical power with an external device.

Abstract: A fluid reaction device (10) is provided having a rotor (90) with vanes (92) pivotably connected thereto. The device (10) includes an entrance (30) for elevated pressure fluid and an outlet (40) for discharge of the fluid after contacting the rotor (90). The elevated pressure fluid passes from the entrance (30) into a high pressure area. The high pressure area is in contact with inlet ports (74) accessing a cylinder (70) within the device (10). The cylinder (70) supports the rotor (90) with a rotational axis (M) of the rotor (90) off center with respect to a central axis (N) of the cylinder (72). The elevated pressure fluid causes the rotor (90) and an attached output shaft (97) to rotate. The rotor (90) includes a trunk (24) with a plurality of posts (93) extending therefrom and with vanes (92) connected to the posts (93) through hinges (94). The vanes (92) can pivot from a first position collapsed against the trunk (24) to a second position spaced away from the trunk (24).

Abstract: An adjustable one-way rotary liquid pumping device including a housing, a cover fixedly engaged with the housing, a first bearing a first bearing fitted in the housing, a second bearing fitted in the cover, an axle extending through the housing and the cover and supported by the two bearings, a rotor fixedly mounted on the axle and having a plurality of pawls, a collar enclosing the rotor, a seat having two protuberances supporting the collar thereby locating the collar at an eccentric position with respect to the axle, a plurality of rollers each fitted between every two of the pawls of the rotor, a plurality of springs urging respective rollers against an inner wall of the housing and an inclined side of the pawls, and an adjustable valve fitted through the housing, the collar, and the seat, whereby the liquid can be pumped in one direction only and the speed of the axle can be adjusted as required.

Abstract: A vane cell pump with a housing ring closed on the face end and with a rotary piston that revolves eccentrically to the inner wall of the housing ring, which rotary piston encloses at least one supply chamber with the inner wall of the housing ring and with at least one spring-loaded vane that is held radially displaceably in order to limit the supply pressure at a given rpm, at least one pressure impingement face that is acted upon by the supply pressure in the supply chamber is formed on the vane in such a way that by the supply pressure, a radial force oriented to the vane counter to the compression spring is produced that at a predetermined supply pressure is greater than the total of the force of the compression spring and the centrifugal force acting on the vane.

Abstract: A vane pump has a plurality of outwardly spring loaded vanes mounted within slots respectively formed in a rotor. The internal surface of the stator of the pump is of cylindrical form, and end plates at the opposite ends of the rotor and stator have inlet and outlet ports formed therein. Each vane is provided with a transfer port which communicates with the inner end of the associated slot and the transfer port is positioned to register with the inlet and outlet ports so that the movement of the vanes within the slots contributes to the pumping action.

Abstract: A vane type hydraulic energy translating device for pumping filtered seawater and which uses seawater as a lubricating fluid. The pump is a compact, light weight design in which the bearings and certain other critical components are fabricated from corrosion resistant, low friction, high strength materials. The vanes as well as flexible side plate members are formed of these corrosion resistant materials. The pump body is formed of high corrosion resistant stainless steel. The side plates are flexible and act as wear surfaces for the ends of the vanes as well as sealing surfaces about the rotor thereby preventing leakage of seawater from high to low pressure areas. Each vane is spring biased radially outward from the rotor axis with four springs disposed within apertures located in the vane base. The vanes are generally rectangular in shape and have an outer end portion which serves as a sliding seal against a cam ring track.

Abstract: A rotary sliding vane fluid pump having an open rotor and radially extended arms forming slots that support the radially extending vanes. The relative position of the vanes and the inlet and discharge ports provide sealing by the vanes to the pump housing whereas the surface of the rotor does not seal to the pump housing so that radial rotor clearance is not critical. The rotor can be manufactured and assembled at lower cost. The rotor shape uses a minimum of material so that it is lower in weight and gives good pressure loading of the vanes. The open rotor is without closed voids to allow quick draining of the pump.

Abstract: A reversible hydraulic motor has a forward and a reverse drive section, each separated by a separating plate. Each section has an outer ring, end plate and inner rotor forming a chamber therebetween. Each rotor has a pair of radial slots, separated by 180.degree., and a piston moveable in each slot. An extension form the outer ring to the rotor divides the chamber and moves the pistons inward into the rotor slots at the end of each revolution. Hydraulic fluid is selectively applied, under pressure, to the desired direction section to the interior space between the rotor slot and the piston during the 180.degree. after the rotor rotates past the extension. Each piston has a fluid path therethrough to allow the provided hydraulic fluid to exit the piston interior space into the chamber in a direction opposite to the desired direction of rotation. This exiting fluid builds up pressure in the chamber and rotates the piston and rotor. A fluid return path is provided in the second 1/2.degree.

Abstract: A hybrid robotic joint actuator utilizing both the quick response time of an electric motor and the high torque capacity of a pneumatic motor. In one preferred embodiment, the hybrid motor includes a pneumatic rotor coupled to an electric rotor in a common stator housing.

Abstract: A fuel pumping apparatus for supplying fuel to a compression ignition engine includes a high pressure pump to which fuel is supplied from the outlet of a low pressure pump of the vane type. The vanes of the pump are mounted in slots in the pump rotor and are spring biased outwardly. A cavity defined by the inner ends of the slots is connected by a spring loaded valve to the outlet when the output pressure is above a predetermined value and to a space in the housing of the apparatus through a valve when the output pressure is below said value. The space contains fuel which accumulates during the operation of the apparatus.

Abstract: A rotary pump has a housing 1 with a driven rotor 7 installed in the housing 1. Vanes 12 are connected around the periphery of the rotor 7. Helical springs 14 are supported against rotor 7, which, acting on an inner surface of vanes 12, press the free end of the vanes 12 against the bore 6 of the housing 1. Each spring 14 has two coaxial sections of turns which spiral in opposite directions so that the springs 14 press the vanes 12 against the bore 6 of the housing 1 without tilting. These sections of turns are each designed with an adjacent support end 21 on the outer or inner section and a bail section, which is arranged between the inner and outer end of the sections of turns, connecting the inner and outer ends of these sections of turns rigidly together, and which projects radially beyond the sections of turns.

Abstract: A water-powered positive displacement auxiliary sump pump has a drive water inlet connected to the municipal water supply via a float actuated pilot valve. The pump is designed to be constructed chiefly of molded plastic supported by an exit manifold connected to the discharge line of an existing electrical sump pump. The presently preferred design is a rotary sliding vane pump having drive water and pump water chambers.

Abstract: This invention, a variable displacement sliding vane pump/hydraulic motor, incorporates an eccentric chamber in which a rotor with a plurality of axially and radially moveable sliding vanes rotates. Axial positioning of the sliding vanes is accomplished by positioning a sliding wall; the swept volume and therefore the capacity of this invention is also directly related to the positioning of the sliding wall. This sliding wall can be positioned by external means including conventional manual and automatic devices. Various embodiments permit pumping capacity variability from essentially zero flow to full flow without the use of bypasses.

Abstract: An improved pump assembly includes a plurality of pumping elements which rotate with a rotor and engage an inner surface of a cam ring to define pumping chambers which hold liquid and/or air. As the pumping chambers move along an inlet arc, liquid flows through an orifice to the chambers. The orifice restricts the rate of flow of liquid to the pumping chambers to a flow rate which is insufficient to fill the chambers with liquid during high speed rotation of the rotor. As the pumping chambers move along an outlet arc which has a constant slope toward the rotor, the volume of each pumping chamber is decreased. When the fluid pressure in the pumping chamber exceeds a pump discharge pressure, one of a series of a check valves opens and fluid is discharged from the pumping chamber.

Abstract: A vane-type rotary machine suitable for use as a compressor, pump or the like, having a cylinder provided with an inner peripheral contour expressed by an epitrochoid-like curve having at least one lobe, a cylindrical rotor contacting the inner peripheral surface of the cylinder and having a plurality of vane grooves, and vanes slidably received by respective vane grooves. The inner peripheral contour of the cylinder constituted by the epitrochoid-like curve is divided at the circumferential mid point of each of the portions where the distance between the rotor and the cylinder is minimized, and the curve is contracted in the circumferential direction by a predetermined angle to form a discontinuity corresponding to the predetermined angle. Both end points of the discontinuity is connected by an arc of the same radius as the rotor.

Abstract: A vane-type compressor of the lubrication type in which pressure applied to vane bottoms is controlled to prevent vane breakage and excessive wear. A rotor is disposed between a rotor housing and a pair of side housings with vanes slidingly disposed within corresponding vane grooves radially formed in the rotor. Intake fluid pressure is applied to spaced defined between each of the grooves and the bottom of the corresponding vanes during suction strokes through a first arcuate groove. A second arcuate groove is formed in an inner surface of the side housings at a position corresponding to the spaces during compression strokes. A pressure discharge passage connected to the arcuate groove and an outlet port is provided and a check valve is provided in the pressure discharge passage.

Abstract: A vane type hydraulic motor which is operable with seawater as the hydraulic fluid for undersea diver use. The motor is compact, lightweight and is lubricated by the seawater working fluid. The motor uses corrosion resistant materials with the requisite flexibility, mechanical strength, friction characteristics and low swelling rate when immersed in seawater. The motor structure provides durable seal means and pressure balanced operation which minimizes wear. The vane structure permits easy sliding vane movement, and uses the seawater pressure to control vane movement and sliding seal capability.

Abstract: A vane motor which uses two-lip vanes has a fluid restrictor in a fluid passage which connects the inner and outer ends of each vane. High pressure fluid is supplied to the inner end of each vane as it traverses the transfer and sealing zone. This fluid flows through the fluid passage to the outer end of the vane to pressure balance the vane. In the event the outer end of a vane is separated from the cam ring the high pressure fluid at the outer end of the vane flows to the low pressure area and a pressure drop is created across the restrictor which results in a force which biases the vane towards the cam ring.

Abstract: A pump for pumping low viscosity fuels has a cam defining a pumping chamber bore wall. A plurality of slippers define pumping pockets located within the bore wall. The slippers are rotated through inlet arcs and through outlet arcs. A pair of orifices of predetermined diameter are located in the respective inlet arcs and communicate with each pumping pocket at a location radially inwardly of the slippers. Each orifice is circular in cross-section and has a diameter within the range of 0.067 inches to 0.076 inches. Each orifice diameter is such that pump noise restricted and the pump has a relatively high inlet vacuum.

Abstract: A drive ring for a rotary expansible chamber hydraulic motor has driving gear teeth on its inner periphery and is constrained against other than planetating motion by a series of angularly spaced eccentric bearings rotatably mounted in fixed port plates between which the drive ring is sandwiched. The eccentric bearings are hydorstatically balanced against peak loads with high pressure fluid. Vanes sliding in radial slots in the drive ring are maintained in engagement against a surrounding cylindrical chamber wall by leaf springs whose opposite ends slide in grooves in the port plates.

Abstract: A slipper vane seal pump has a porting plate and pumping chamber combination having optimum slipper seal porting configuration so that in a typical ten slipper pump the spacing from the end of the constant tangent arc to the opening of the inlet port is nominally ten degrees or approximately one times the slipper arcuate surface interface to the cam bore. Further, the end of the inlet port termination point matched with the arcuate contour of the pumping bore wall assures that each slipper will return to its corresponding driving slot before the inlet port openings are terminated when one full slipper arcuate width enters the constant working arc. The inlet port is extended from 25.degree., assuming a zero degree datum, to 76.degree., thereby providing a lengthened arc.

Abstract: A system for precisely positioning a linearly movable output member incorporates an improved nonexpansion, bi-directional vane motor whose internal gas carrying chamber is configured to prevent radial vane reciprocation while the vanes of the motor are under pressure-generated side load. Position of the output member is electrically sensed and in response to the sensed position, pressurized gas flow to the vane motor is adjusted to precisely position the output member.

Abstract: A seal for a vane type fluid pressure motor or pump. The motor or pump comprises a housing having a chamber receiving a rotor, an elongated bore extends through the housing and the rotor and receives a shaft which is drivingly engaged by the motor through a splined connection. A seal assembly is disposed on either side of the rotor to prevent leakage from the area between the side walls of the rotor and the side walls of the chamber and into the elongated bore. Each seal assembly is comprised of a cylindrical sleeve affixed to a side wall of the rotor and extends axially therefrom. The assembly is disposed in an annular recess in the bore at a point adjacent the rotor. The sleeve is affixed to the rotor for rotation therewith and is spaced from an undercut portion of the housing wall. The undercut defines the annular recess. An annular elastomeric sealing member is disposed in the recess and is affixed at its radially outward side to the recess wall and surrounds and snugly engages the sleeve.

Abstract: A rotary piston engine comprising a stator and a rotor including piston slides in the rotor, and working chambers between the rotor and the stator wherein movable parts are provided in the stator for adjusting the volume of the working chambers.

Abstract: A rotary sliding vane type of fluid pump or motor has a rotor with loosely fitted vanes radially slidable in the rotor slots to follow the varying contour of the cam ring. Hydraulic pressure to project the vanes outwardly is fed to their inner ends along three paths comprising the side clearance between the slot and the vane which is open directly to one of the working chambers, a first set of pressure feed holes communicating with the bottom of each slot in turn, and a second set of pressure feed holes communicating with a widened portion of each slot in turn intermediate its ends.

Abstract: A rotary internal combustion engine comprising a cylindrical housing comprised of an annular intermediate member and a pair of end plates, one on each side of the annular member, and defining an enclosed, generally cylindrical, rotor chamber. A shaft is journaled in the end plates and extends through the chamber. A rotor is fixed to the shaft for rotation therewith in the rotor chamber. The rotor chamber is concentric with the housing, while the rotor and shaft are concentric and eccentrically disposed relative to the chamber and housing. Pivoted vane elements are mounted on the periphery of the rotor and are biased into engagement with the annular wall of the rotor chamber and sequentially form intake, compression, combustion and exhaust chambers between the rotor and the annular wall. The vanes include resilient elements having bent-back portions which engage the annular wall to provide seals between the sequentially formed chambers.

Abstract: An annular ring is closed on each side by a side plate secured thereto thus forming a cylindrical chamber or casing. A rotor is mounted on a shaft which is supported axially by the side plates, the rotor being within the chamber. A plurality of pistons are mounted for pivotal action around the periphery of the rotor and are in sealing engagement with the side plates. These pistons have a transverse contact line engaging the inner surface of the annular ring. This inner surface is contoured so that a compression lobe and a power lobe are formed and as the rotor rotates, fuel and air is drawn in through an intake in the wall of the ring, is compressed by one of the pistons, and then firing takes place so that expansion occurs as the piston is passing through the power lobe with the residual gases being exhausted through the exhaust port. A complete cycle occurs through 360.degree.

Abstract: A concentric, valveless internal combustion engine is provided, consisting essentially of a rotary piston which revolves in a casing about a central shaft. The rotary piston contains combustion cavities distributed equidistantly around its perimetral wall surface. The casing contains combustion chambers and adjoining exhaust ports, and fuel intake manifolds in spaced relationship from one another. One or more means for igniting the fuel mixture is/are distributed at spaced intervals which are designed to provide timed ignitions of the fuel mixtures. Means are provided for starting the engine's rotation, and for feeding it a fuel-air mixture. As the piston rotates it carries the fuel mixture from the intakes to the points of fuel ignition, then to combustion chambers where the ignited fuel gases expand rapidly, and next to ports where the gases are exhausted from the engine.