Abstract: A rotary pump, preferably a vacuum pump, featuring: a delivery space including an inlet on a low-pressure side and an outlet on a high-pressure side of the pump; a rotor which is arranged in the delivery space and delivers a fluid from the inlet into the delivery space to the outlet from the delivery space; at least one housing part which delineates the delivery space at least axially; and a drive shaft which is connected in drive terms to the rotor; including at least one sealing element which is connected, secured against shifting and/or rotating, to the drive shaft and/or rotor and forms a radial sealing gap with the housing part.

Abstract: A method of casting a rotor using a cavity and core mold allows a longitudinal slot oriented transversely to the axis of rotation to be finish ground to high precision and tight tolerances by casting the slot to have a wider section which extends from the axis to a radius greater than the radii of the hubs of the rotor, and a narrower section which extends from the wider section to the outer surface of the rotor. The geometrical relation of the slot sections to the hubs as cast permits the grinding step to be performed without forming a leak path in either of the hubs.

Abstract: An arrangement is disclosed for mixing of particulate filling material into a consumer ice mass. The arrangement includes a rotor cylinder having: a first rotor blade, a second rotor blade and a third rotor blade for the mixing-in of the consumer ice mass and the particulate filling material by rotation, wherein: the first rotor blade has a first notch configured to accommodate the second blade and the third blade, and a second notch configured to accommodate the front bearing, the second rotor blade has a first notch configured to accommodate the first rotor blade, a second notch configured to accommodate the third blade, and a third notch configured to accommodate the front bearing, and the third rotor blade has a first notch configured to accommodate the first rotor blade and the second rotor blade, and a second notch configured to accommodate the front bearing.

Abstract: The present invention relates to a receptacle (20) for supply of a treatment agent to a machine (21) for washing, dishing and rinsing goods. The receptacle comprises at least a first inlet (22a) for receiving the treatment agent and at least a second inlet (23) for receiving a liquid. The receptacle further comprises a vessel (24) located at a bottom section of the receptacle, which vessel is arranged to receive the treatment agent and the liquid supplied to the receptacle. Moreover, the receptacle comprises at least a first outlet (25) for supplying the machine with a mixture of the treatment agent and the liquid, said first outlet being in fluid connection with the vessel such that the mixture overflows into the first outlet when the vessel is filled.

Abstract: A vane for a vane cell device comprising a stator and a rotor rotatably arranged in the stator with a plurality of guide grooves in each of which a vane can be movably mounted along a direction of movement. The vane has a high-pressure side, and a low-pressure side facing the high-pressure side, for fluid conveyed or flowing through a workspace of the vane cell device. The vane has a first side wall formed on the high-pressure side and a second side wall formed on the low-pressure side, wherein the first and second side wall are connected to each other by a plurality of ribs forming lateral limits of fluid channels. The first and second side wall are offset relative to each other so that the high-pressure side is only partially covered by the first side wall, and the low-pressure side is only partially covered by the second side wall.

Abstract: A vacuum pump of a vehicle for reducing operation noise may include a rotor rotating in a space defined by a housing formed in a pump body at an eccentric position relative to a center of the space, a vane installed to the rotor to rotate eccentrically in the space, and an oil outlet passing through the pump body and formed at a predetermined height above a lower limit of the space such that, when lubricant in the space is discharged in a pressurized state by the vane, the lubricant is not reintroduced back into the space by gravity.

Abstract: An enclosed positive displacement mechanism including a body with an inlet and an outlet; a rotor mounted in the body and rotatable about a main axis; an orbiting piston located in the cavity, rotatable about an eccentric secondary axis and arranged to orbit around the main axis to roll on the internal side surface of the cavity; and a vane located in the cavity, slidable in the piston and mounted in the body between one inlet and one outlet so as to oscillate. The orbiting piston and the vane divide in cyclic manner the cavity into a first and a second chamber with variable volume, which are mutually complementary and communicate with the inlet and the outlet. During a portion of its oscillation, the vane passes through the piston and is in contact with the side surface of the cavity, thereby separating the chambers in a fluid-tight manner.

Abstract: A metering pump with a special-shaped cavity comprising a housing, a rotor and two cover plates. The housing is a cylinder with a special-shaped surface inner cavity formed by combining two circular arc surfaces with two non-circular arc surfaces and a planar surface, an inlet and an outlet. The rotor comprises a rotor body and two pairs of combined sliding plates. The housing is matched with the cover plates for constituting a sealed cavity. When the rotor rotates, the non-circular arc surface of the special-shaped surface inner cavity can enable the two pairs of the combined sliding plates to slide in a cross manner so as to suck in fluid from the inlet and press out the fluid from the outlet. When the rotor rotates one cycle, four standard volumes are formed in a cavity body and the equal quantity of the fluid flows by the cavity body.

Abstract: An internal combustion engine includes in one aspect a source of a pressurized working medium and an expander. The expander has a housing and a piston, movably mounted within and with respect to the housing, to perform one of rotation and reciprocation, each complete rotation or reciprocation defining at least a part of a cycle of the engine. The expander also includes a septum, mounted within the housing and movable with respect to the housing and the piston so as to define in conjunction therewith, over first and second angular ranges of the cycle, a working chamber that is isolated from an intake port and an exhaust port. Combustion occurs at least over the first angular range of the cycle to provide heat to the working medium and so as to increase its pressure.

Abstract: A rotary compressor having a housing and a rotor positioned within an internal cavity of the housing. The rotor being configured to rotate about a rotor axis of rotation eccentric to a housing longitudinal axis. A gate is also provided that is slidably mounted therewith the rotor and movable axially about and between a first position, in which a distal end of the gate is positioned at a first distance from the peripheral surface of the rotor, and a second position, in which the distal end of the gate is positioned at a second distance from the peripheral surface of the rotor. The distal end of the gate being constrained to be spaced proximate from the inner wall surface of the housing as the rotor rotates about the rotor axis of rotation.

Abstract: A vane machine for expansion or compression of gases, air, engine exhaust, vapors or a mixture thereof, includes a housing with a cylindrical space having inlet and outlet ports, a shaft offset in parallel or eccentric relative to a central housing axis and first and second circular discs on the shaft mutually offset in parallel. Slides are guided by the circular discs and displaceable in direction of an inner housing wall. Vane cells are formed by two neighboring slides and an adjoining region of the wall and volumes of the vane cells in vicinity of the inlet and outlet ports differ. To obtain reliability and efficiency, each circular disc has a plurality of circular arcuate slots, each slide can have a circular arc shape on an end facing the housing, and the circular arcuate part of each slide moves into circular arcuate slots of first and second circular discs.

Abstract: The present invention provides a combined gas and liquid pump (46) for an internal combustion engine (10). The pump (46) includes a casing (58) having a cavity (60) containing a rotor (62) and a vane (64) slidably mounted to the rotor (62), wherein the cavity (60) is provided with an inlet (50) connectable to a gas source, a further inlet (48) connectable to a liquid source which is separate to the gas source, and an outlet (56). The rotor (62) and vane (64) are movable to draw liquid and gas into the cavity (60) through the respective inlets (50,48) and to move said liquid and gas out of the cavity (60) through the outlet (56). The inlets (50,48) are arranged through the casing (58) such that fluid is drawn first through one of the inlets and then through the other of the inlets before being discharged through the outlet (56).

Abstract: A combustion apparatus having a housing including an inner surface that defines at least one chamber, a rotor, a rotor shaft, an intake shaft, an exhaust shaft, and a gearing mechanism. The chamber includes an intake valve port and an exhaust valve port, and the rotor shaft is coupled to a gear at one end and has at least two opposing flat surfaces received by an opening in the rotor. The intake and exhaust shafts are geared to the rotor shaft and have at least one opening each that is aligned with the intake and the exhaust valve ports. A gearing mechanism selectively controls the duration in which the openings are aligned with the ports. Two or more rotors may be utilized to produce more power and reduce vibration.

Abstract: A vane pump 1 has a pump chamber 2A through an axial direction oil supply hole 11a, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c of an oil supply passage 11. A gas passage 13 contains a gas groove 13a whose one end is made to communicate with an outer space, the gas groove 13a being formed on an outer peripheral surface of a shaft part 3B of a rotor 3, and the other end of this gas groove is made to intermittently overlappingly communicate with the axial direction oil supply groove 11c by a rotation of the rotor.

Abstract: A vane pump in which a lubricating oil from an oil supply pipe 12 is supplied to a pump chamber 2A through an axial direction oil supply hole 11a of an oil supply passage 11, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c. A gas passage 13 includes a diameter direction gas hole 13a and an axial direction gas groove 13b, and the diameter direction gas hole 13a is made to communicate with the axial direction gas groove 13b when the diameter direction oil supply hole 11b is made to communicate with the axial direction oil supply groove 11c.

Abstract: An oil supply groove in communication with a pump room is formed above a bearing of a housing, and an open air groove in communication with atmospheric air is formed at a position rotated around the bearing by 90° from the oil supply groove. In a shank of a rotor, a branch passage branching from an oil passage formed in its axial direction to the diametrical direction of the shank and an open air passage formed in the direction perpendicular to the branch passage are formed. The branch passage and the oil supply groove communicate with each other while the open air passage and the open air groove are arranged to also communicate with each other.

Abstract: A vane type vacuum pump 1 is provided in the vicinity of an air intake passage 11 for sucking the air into a pump chamber 2, and communicates a space A on the front side and a space B on the back side of the rotational direction of the vane at the time of the reverse rotation of the vane 6, and includes an escaping groove 21 for allowing a lubricating oil to escape into the space B on the back side from the space A on the front side.

Abstract: A vacuum pump has inside the pumping chamber valves intended to control the operation by opening and closing during the suction and delivery cycle of the pump. The valves or parts connected thereto are formed at least in part by a ferromagnetic material. A magnetic inductor is applied outside a wall, formed by a non ferromagnetic material, of the pumping chamber of the pump, and inside the pumping chamber are installed conducting elements of ferromagnetic material, for conducting magnetic flow produced, by the inductor, up to polar points close to the positions taken in the conditions of inactivity by the valves, so as to magnetically attract the valves (10,20) in an inactivity position when the inductor is operated, and thus stop the pneumatic operation of the pump without stopping its motion which then becomes idle.

Abstract: A rotary compressor having a housing and a rotor positioned within an internal cavity of the housing. The rotor being configured to rotate about a rotor axis of rotation eccentric to a housing longitudinal axis. A gate is also provided that is slidably mounted therewith the rotor and movable axially about and between a first position, in which a distal end of the gate is positioned at a first distance from the peripheral surface of the rotor, and a second position, in which the distal end of the gate is positioned at a second distance from the peripheral surface of the rotor. The distal end of the gate being constrained to be spaced proximate from the inner wall surface of the housing as the rotor rotates about the rotor axis of rotation.

Abstract: A rotary expansible chamber device includes intersecting, two-piece vanes that provide expansion/compression chambers as the vanes rotate about a central axis of a rotor housing. The rotor housing has an inner contour defined by a conchoid of rhodonea having a shape coefficient of at least 3. The vanes are captured by a primary and secondary output shaft, with engagement arms of the primary output shaft being juxtaposed between the intersecting vanes. A vane spring helps maintain each vane at a constant length and in sealing engagement with the inner contour of the rotor housing.

Abstract: A rotary fluid-displacement assembly having a housing and a rotor positioned within an internal cavity of the housing. The rotor being configured to rotate about a rotor axis of rotation eccentric to a housing longitudinal axis. A gate is also provided that is slidably mounted therewith the rotor and movable axially about and between a first position, in which a distal end of the gate is positioned at a first distance from the peripheral surface of the rotor, and a second position, in which the distal end of the gate is positioned at a second distance from the peripheral surface of the rotor. The distal end of the gate being constrained to be spaced proximate from the inner wall surface of the housing as the rotor rotates about the rotor axis of rotation.

Abstract: A rotary pump includes a stator having a chamber delimited by a circumferential wall, a cylindrical rotor tangent to the circumferential wall of the chamber and suitable for being driven in rotation around an axis eccentric with respect to the chamber, and at least a vane diametrically traversing the rotor by delimiting in the rotor two half shells, mutually separated by the walls guiding the vane. The two half shells are hollow, and inside these hollow half shells are housed elastic leaf springs forming one-way valves with respect to four passageways formed in the half shells; the discharge of the air-oil mixture takes place, after a centrifugation and a partial recycling, through passageways, also in the case of a counter rotation of the pump. This configuration allows a bidirectional use of the same rotor.

Abstract: A vane machine includes a housing with a inlet port and an outlet port, a rotor mounted in a cavity of the housing. The rotor has a faceplate and a guide cylinder mounted eccentrically on an end surface of the housing opposite to the faceplate. The guide cylinder is rotatable and provided with a diametrical face groove open from a side of the faceplate, and one or more working vanes mounted on the faceplate such that the faceplate is rotatable and movable in the grooves of the guide cylinder as the faceplate rotates. The diameter of the guide cylinder 7 is D>4a?L, where e is the eccentricity of the axis of the guide cylinder and the length of the working vane is L?4e×sin 90°/N, where N is the number of working vanes.

Abstract: A combustion apparatus having a housing including an inner surface that defines at least one chamber, a rotor, a rotor shaft, an intake shaft, an exhaust shaft, and a gearing mechanism. The chamber includes an intake valve port and an exhaust valve port, and the rotor shaft is coupled to a gear at one end and has at least two opposing flat surfaces received by an opening in the rotor. The intake and exhaust shafts are geared to the rotor shaft and have at least one opening each that is aligned with the intake and the exhaust valve ports. A gearing mechanism selectively controls the duration in which the openings are aligned with the ports. Two or more rotors may be utilized to produce more power and reduce vibration.

Abstract: An internal combustion engine includes in one aspect a source of a pressurized working medium and an expander. The expander has a housing and a piston, movably mounted within and with respect to the housing, to perform one of rotation and reciprocation, each complete rotation or reciprocation defining at least a part of a cycle of the engine. The expander also includes a septum, mounted within the housing and movable with respect to the housing and the piston so as to define in conjunction therewith, over first and second angular ranges of the cycle, a working chamber that is isolated from an intake port and an exhaust port. Combustion occurs at least over the first angular range of the cycle to provide heat to the working medium and so as to increase its pressure.

Abstract: An oil supply groove 12 in communication with a pump room 2A is formed above a bearing 2B of a housing 2, and an open air groove 14 in communication with an atmospheric air is formed at a position rotated around the bearing 2B by 90° from the oil supply groove. In a shank 3B of a rotor 3, a branch passage 11a branching from an oil passage 11 formed in its axial direction to the diametrical direction of the shank, and an open air passage 13 formed in the direction perpendicular to the branch passage are formed. Then, the branch passage and the oil supply groove communicate with each other, at the same time, the open air passage and the open air groove are arranged to also communicate with each other, and when the oil passage and the oil supply groove communicate with each other as the rotor stops, then an atmospheric air flowing in from the open air passage eliminates a negative pressure in the pump room, thereby the lubricating oil is prevented from flowing into the pump room in large quantities.

Abstract: A pump, in particular a vacuum pump for motor vehicles, wherein a rotor with at least one vane is mounted inside a pump housing, the rotor being rotatably driven by the combustion engine of the motor vehicle via a coupling device. An intermediate element is arranged between the rotor and the coupling device so as to captively retain the rotor and coupling device and protect them against wear.

Abstract: The present invention provides a sliding vane, which is provided through a rotor in a cylinder and reciprocates in a diametrical direction and rotates together with the rotor. The sliding vane of the present invention includes a vane body (10), which has plate seating slots (23a) and (23b) formed in the respective diametrical opposite ends of the vane body. The sliding vane further includes two pairs of compression plates (3a) and (3b), (3c) and (3d), which are provided in the plate seating slots. First springs (15) are provided in a diametrically inner end of each compression plate. A sealing rod insertion slot (7a), (7b), (7c), (7d) is formed in a diametrically outer end of each compression plate, and a second spring (19) is provided between axially inner ends of the adjacent compression plates. The sliding vane further includes a sealing rod (5a), (5b) which is inserted into and occupies the entire length of the sealing rod insertion slots of adjacent compression plates placed in each plate seating slot.

Abstract: A rotor for rotary engines and compressors is disclosed. The rotor of the present invention includes a first body unit (100a), which has a rotor housing (102) and a core (104) provided with a plurality of roller plate seats. The rotor further includes a second body unit (100b) having a structure symmetrical with the first body unit, a roller support plate (40), which is placed on each of the roller plate seats, a roller cage (42), which is provided on each of the roller support plates and has a pin roller receiving space therein, and a plurality of pin rollers (46), which are placed in the pin roller receiving space of the roller cage to ensure smooth reciprocation of the sliding vane. The rotor further includes the sliding vane (30), which is provided between the first body unit and the second body unit and reciprocates in a diametrical direction, and a spacer (106), which maintains a constant distance between the first body unit and the second body unit.

Abstract: The invention relates to a dividing device, comprising an outer housing with an inlet and at least two outlets, at least two pump chambers placed adjacently of each other in the outer housing, each with a pump chamber infeed connected to the inlet and each with a pump chamber discharge connected to the outlet, at least two vane-type rotors, one in each pump chamber and with a rotation axis in line, each vane-type rotor comprising a hub provided with continuous vanes which are slidable through the hub along their longitudinal axis and almost perpendicularly of the axis of the hub, wherein the outer housing is divided into outer housing segments.

Abstract: A gas vane pump wherein a lubricant is intermittently introduced into a housing during rotation of a rotor, through a supply passage formed through the housing and the rotor, and the relative position between the rotor having a diametric hole and the housing having a communication groove is determined such that when the rotor is at an angular position in the middle of a predetermined angular range relative to the housing and the hole is in communication with the groove, a point of contact between a vane movably held by the rotor and the inner circumferential surface of the housing is located at the lowest position of the inner circumferential surface. When the rotor is stopped within the predetermined angular range, the vane divides the remaining lubricant into two portions, which are discharged at different times, making it possible to reduce the load on the vane upon restarting the pump.

Abstract: A vane pump comprising a housing, a rotor and a vane is provided. The housing comprises a pump room having an approximately circular inner wall. The rotor rotates at an eccentric position relative to a center of the pump room and slides in contact with a part of the inner wall of the pump room. The vane is rotated by the rotor, for dividing the pump room into a plurality of spaces full-time. In the housing, among spaces divided by a center line drawn between the center of the pump room and a center of rotation of the rotor, an intake passage in one space and an exhaust passage in the other space are formed, respectively. An oil supply passage is formed in the rotor and the housing. A lubricating oil is intermittently fed through a communicating hole of the oil supply passage.

Abstract: A pump includes a case, a rotor, and a partition member. The case has a hollow inside defined by an inner wall surface thereof and includes a suction inlet through which fluid is sucked in the hollow and an exhaust outlet through which the fluid is ejected from the hollow. The rotor is rotatable in the hollow. The partition member is supported with respect to the rotor in the direction across the rotor such that two ends make constant contact with the inner wall surface defining the hollow, and is rotatable with the rotor. When the rotor is rotated, the partition member slides in the direction across the rotor and expands and shrinks in the same direction, thereby the two ends of the partition member make constant contact with the inner wall surface of the case. Accordingly, the fluid is sucked through the suction inlet in the hollow and the sucked fluid is ejected through the exhaust outlet from the hollow.

Abstract: The rotary machine can be used as a rotary internal combustion engine and as a pneumatic or hydraulic pump. The rotary machine comprises a housing in the form of two intersecting cylinder parts of different diameters having parallel axes. A rotor is received in the housing coaxially with the smaller-diameter cylinder and comprises at least two segmental rotor parts provided with annular rotor covers. At least two pairs of annular elements are provided engaging with the segmental rotor parts. Pivotal elements are interposed between the annular elements of each pair. A driving member is accommodated movably in the openings of the pivotal elements. The axis of rotation of the driving member is coincident with the axis of the larger-diameter inner cylindrical surface of the housing.

Abstract: A pump is provided with a housing, a rotor, and a separating member. The housing is formed by connecting two housing members. A first housing member has a cylindrical wall and a bottom wall, and the other end of the cylindrical wall is open. A second housing member comprises a sealing portion, a side portion and a connecting portion. The side portion extends from the sealing portion to the bottom side of the first housing member along an outer face of the cylindrical wall of the first housing member. The connecting portion connects a distal end of the side portion to the first housing member. The sealing portion fits tightly with the cylindrical wall of the first housing member along its entire circumference. The open end of the first housing member is reliably sealed by the second housing member. The shape of the cavity within the housing is adjusted reliably to a predetermined shape.

Abstract: The pump is provided with a housing 31, a rotor 40, and a separating member 50. Rotor 40 and separating member 50 are rotated within housing 40. Separating member 50 separates the cavity of housing 31 into a divided space 77a, a divided space 7b and a divided space 77c. A curved face 42 having a larger radius of curvature than rotor 40 is formed in a limited circumferential angular region at an outer peripheral surface of rotor 40. A space 43 is maintained between the curved face 42 and housing 31 even when the curved face 42 is closest to the inner face of housing 31. The space 43 forms a passage between an inlet port and an outlet port. When rotor 40 is rotated, there is a smaller degree of change in the resistance in the passage 43, and rotor 40 rotates smoothly.

Abstract: A rotary engine is provided with solid vanes which extend through the rotor and engage opposing interior wall portions of the stator housing. A series of grooves in the interior wall permit the expanding exhaust gases to by-pass the minimal surface area of vanes proximate to the combustion chamber to engage the larger surface area of a vane which is protruding more significantly from the rotor. This robust rotary engine is preferably made of cast iron, having internal portions coated with ceramic so that it readily can operate at temperatures exceeding 850° F. The heat energy is utilized to obtain maximum productive work rather than being discarded as a waste product as is typical with most state of the art power plants, resulting in an efficiency rating exceeding 60%.

Abstract: A rotary piston pump comprising a rotor mounted within a housing, the rotor having a pair of slidably mounted vanes on opposite surfaces. The inner wall of the housing acts as a cam surface to move the vanes inwardly, and centrifugal force or a combination of centrifugal force and biasing causes the vanes to move outwardly. The rotor is eccentrically mounted within the housing and the housing interior walls are of irregular configuration, whereby fluid from an inlet is moved by the vanes through the housing to an outlet. This rotary piston pump is of economic construction, serves a variety of applications and is easy to service.

Abstract: A dividing device, comprising at least one vane-type rotor comprising a hub provided with continuous vanes which are slidable through the hub along their longitudinal axis and almost perpendicular to the axis of the hub, the hub being provided with axial grooves for holding the continuous vanes which grooves partially divide the hub in sections, a part of the sections being provided with an aperture axially through the hub, for providing a means for connecting several vane-type rotors to each other, the apertures being unround.

Abstract: A rotary engine is provided that comprises a compression cylinder and combustion cylinder divided by a separation wall. Air or a fuel/air mixture is drawn into the compression cylinder, compressed, and then transferred to the combustion cylinder. The compressed air or air/fuel mixture is ignited in the combustion cylinder, creating an expansion of the combustion gases which drives the system. The compression and combustion cylinders have epicycloidal-shaped chambers that each house a single vane. The vanes pass through the crankshaft and adjust to remain in contact with the chamber walls as the crankshaft rotates. The compression ratio of the present invention can be maximized by adjusting the thicknesses of the compression and combustion cylinders as well as by offsetting the positions of the compression and combustion vanes with respect to one another.

Abstract: A vacuum pump, in particular for brake booster systems in motor vehicles, with a drivable rotor via which a blade in a housing can be set in rotation is proposed. The vacuum pump is distinguished by the fact that the rotor consists of plastic and is formed as one piece.

Abstract: The present invention relates to a compressor, and more particularly, to a compressor for continuously extruding and feeding a compressing medium introduced into a compressing chamber, by means of a pressing pin member being elastically contacted with an inner circumference surface of the compressing chamber and a rotary pressing member having two wings at left and right.

Abstract: A rotary compressor includes a cylinder formed with an inlet and an outlet, a rotor disposed eccentrically and rotatably in the cylinder and formed with a sliding space that extends in a radial direction through the rotating axis of the rotor, and a sliding vane disposed slidingly in and spanning the sliding space. The cylinder cooperates with the rotor to define a chamber therebetween. The sliding vane divides the chamber into intake and discharging segments that are respectively in fluid communication with the inlet and the outlet.

Abstract: The present invention relates to a compressor, and more particularly, to a compressor for continuously extruding and feeding a compressing medium introduced into a compressing chamber, by means of a pressing pin member being elastically contacted with an inner circumference surface of the compressing chamber and a rotary pressing member having two wings at left and right.

Abstract: A vacuum pump, in particular for brake booster systems in motor vehicles, with a drivable rotor via which a blade in a housing can be set in rotation is proposed. The vacuum pump is distinguished by the fact that the rotor consists of plastic and is formed as one piece.

Abstract: A vacuum pump, in particular for brake booster systems in motor vehicles, with a drivable rotor via which a blade in a housing can be set in rotation is proposed. The vacuum pump is distinguished by the fact that the rotor consists of plastic and is formed as one piece.

Abstract: The present invention relates to a cylinder structure for a rotary vane type vacuum pump which is capable of preventing a high pressure gas in a discharging port from flowing beyond vanes in the direction of a suction portion for thereby implementing a high vacuum state, decreasing a time required for obtaining a high vacuum state, and decreasing a noise.

Abstract: A grooved double combustion chamber rotary engine includes a rotary compression unit, a rotary gas motor unit, and a combustion chamber, the rotary compression unit being connected to the respective rotary gas motor unit and the combustion chamber to constitute a stroke, and two strokes being alternating to achieve power output.

Abstract: A rotary vane pumping machine having a rotary-linear vane guidance structure, including a translation ring disposed at each axial end of the pumping machine, the translation ring rotating around a fixed hub, with the fixed hub being eccentric to a rotor shaft axis, with the rotor spinning around the rotor shaft axis which is a fixed rotational axis relative to a stator cavity. A plurality of vanes are disposed in a corresponding plurality of vane slots in the rotor, each of the vanes having a tip portion and a base portion, with the base portion having a protruding tab extending from each axial end therefrom. A plurality of linear channels are formed in each translation ring, wherein the protruding tabs extending from the base portion of each of the plurality of vanes communicate with a respective linear channel in the translation ring, whereby the rotor rotation causes rotation of the vanes and a corresponding rotation of the translation ring.

Abstract: A high compression ratio and mechanical efficiency are realized by a rotary power generating device having a cylindrical ring secured between a pair of cylindrical casings. A rotor assembly is disposed within the internal chamber defined by the ring and casings and includes a pair of shafts which extend outwardly through eccentric holes formed in the casings. The assembly further includes a pair of collars engaged within arcuate-shaped recesses formed in the internal walls of the casings and a longitudinal slot through which a blade is slidably received to define three closed areas within the internal chamber.