Abstract: A vane pump having an electric drive unit with a drive shaft, a pump chamber, a rotor arranged in the pump chamber so as to rotate about a rotational axis, and a driver that has at least one driver pin and is connected in a rotationally fixed manner to the drive shaft, wherein, in an operating state of the vane pump, the driver pin, by way of a contact surface of the driver pin designed as a section of a lateral surface, engages in a torque-transmitting manner with a contact surface of the rotor delimiting a rotor recess designed to correspond to the driver pin. In order to improve a vane pump, it is proposed that the contact surface of the rotor is designed and arranged in such a manner that the rotational axis lies in the contact surface when this contact surface is hypothetically extended toward the rotational axis.

Abstract: A compressor body (60) which is formed such that a compression chamber (43A) dr ivied by a rotor (50), a cylinder (40), side blocks (20, 30) and vanes (58) performs only one cycle of intake, compression and discharge in a period of one rotation of the rotor (50), and a housing (10) which covers the compressor body (60) are included, and an outline shape of a cross-section of an inner circumferential surface (41) of the cylinder (40) is formed such that in the period of the one rotation of the rotor (50), (i) a region in which a capacity of the compression chamber 43A rapidly increases, (ii) a region in which the capacity of the compression chamber 43A rapidly reduces, (iii) a region in which a capacity reduction rate of the compression chamber 43A is smaller than a capacity reduction rate of the region (ii), and (iv) a region in which the capacity reduction rate of the compression chamber 43A is larger than a capacity reduction rate of the region (iii) are consecutively provided in order.

Abstract: A rotary compressor (102) has a shaft (4), a cylinder (5), a piston (8), a first vane (32), a second vane (33), a first suction port (19), and a second suction port (20). The first vane (32) divides a space between the cylinder (5) and the piston (8) along a circumferential direction of the piston (8). The second vane (33) further divides the space divided by the first vane (32) along the circumferential direction of the piston (8) so that a first compression chamber (25) and a second compression chamber (26) having a smaller volume than the first compression chamber (25) are formed within the cylinder (5). The first suction port (19) introduces a working fluid into the first compression chamber (25). The second suction port (20) introduces a working fluid into the second compression chamber (26). The second suction port (20) is provided with a suction check valve (50).

Abstract: A pump housing has a cylindrical interior surface having outlets and a pair of side surfaces defining, in combination with the interior surface, a substantially cylindrical chamber. The surfaces have inlets. A rotor has a void, lobes and, for each lobe, a throughpassage. The rotor is positioned in the chamber such that the void communicates with the inlet to receive fluid and the throughpassage for each lobe provides communication between the void and chamber. The rotor is rotatably mounted in the chamber such that the lobes traverse the cylindrical surface. Provided for each outlet is a vane. As the rotor turns, the rotor outer surface is traversed by the vane to create, as the vane traverses a throughpassage, a chamber ahead of the vane which increases in volume and communicates with the throughpassage, and a chamber behind the vane which decreases in volume and communicates with the outlet port.

Abstract: A rotary compressor (102) has a shaft (4), a cylinder (5), a piston (8), a first vane (32), and a second vane (33). The first vane (32) divides a space between the cylinder (5) and the piston (8) along a circumferential direction of the piston (8). The second vane (33) further divides the space divided by the first vane (32) along the circumferential direction of the piston (8) so that a first compression chamber (25) and a second compression chamber (26) having a smaller volume than the first compression chamber (25) are formed within the cylinder (5). The piston (8) and the second vane (33) are integrated together, or the piston (8) and the second vane (33) are coupled together.

Abstract: Rotary vane pumps include casings having asymmetrical cavities that accommodate a rotor. For a single pump chamber, one portion of the rotor abuts or nearly abuts the inner wall of the cavity at a single location while one portion of the rotor and the inner wall are not in contact with each other thereby defining a pump chamber. For a dual pump chamber embodiment, two diametrically opposed portions of the rotor abut or nearly abut the inner wall of the cavity while two portions of the rotor and inner wall are not in contact with each other thereby defining the two pump chambers. The two pump chambers are disposed on opposite sides of the minor axis of the cavity. The cavities of each pump are skewed so each pump chamber is larger in volume at the inlet end than at the outlet end.

Abstract: In a vane rotary compressor, a discharge valve on a discharge flow channel communicates an operating chamber in a compression element with a discharge hole. The discharge valve is pushed from an opening portion of a discharge valve groove to an outer circumferential surface of a roller by a high-pressure refrigerant when pressure in an operating chamber is lower than the pressure of the high-pressure refrigerant. The discharge valve is pushed back into the discharge valve groove by the refrigerant pressure in the operating chamber when the pressure in the operating chamber is higher than the pressure of the high-pressure refrigerant. The discharge flow channel is closed by the outer circumferential surface of the discharge valve pushed out from the opening portion of the discharge valve groove and the outer circumferential surface of the roller, and opens when the discharge valve is pushed back into the discharge valve groove.

Abstract: Rotary vane pumps include casings having asymmetrical cavities that accommodate a rotor. For a single pump chamber, one portion of the rotor abuts or nearly abuts the inner wall of the cavity at a single location while one portion of the rotor and the inner wall are not in contact with each other thereby defining a pump chamber. For a dual pump chamber embodiment, two diametrically opposed portions of the rotor abut or nearly abut the inner wall of the cavity while two portions of the rotor and inner wall are not in contact with each other thereby defining the two pump chambers. The two pump chambers are disposed on opposite sides of the minor axis of the cavity. The cavities of each pump are skewed so each pump chamber is larger in volume at the inlet end than at the outlet end.

Abstract: The invention relates to a vane for a vane pump, in particular a vane vacuum pump, having a crucible-shaped housing and provided with a rotor mounted eccentrically and rotatably in the housing, wherein the vane is displaceably mounted perpendicular to the axis of rotation in the rotor and the free ends thereof are in contact with the interior circumferential surface of the housing, wherein the vane has a closed surface, at least in the sections protruding beyond the rotor, in the direction of the interior circumferential surface, and the surface is formed by an exterior wall, which is provided with a coating, wherein the coating is provided with perforations in the area located inside the rotor.

Abstract: It is an object of the present invention to provide a vane rotary type air pump in which a pump mechanism and a drive motor are directly connected to each other and low noise is realized. In the vane rotary type air pump in which a cylinder (103), a rotor (110 ) and a vane (112) are sandwiched between a front plate (not shown) and a rear plate (not shown), an opened end (111b) of the vane groove (111) is provided in a reversed rotation direction region of the rotor (110) with respect to straight line connecting a center O of the rotor (110) and the closed end (111a) of the vane groove (111). That is, a “stroke” type vane disposition is employed. With this noise of the air pump is reduced.

Abstract: An internal gear pump comprises a pump housing formed with a gear receiving recess, a pump cover coupled with the pump housing to cover the gear receiving recess, a hydraulic passage that uses the gear receiving recess as a passage part thereof, and annular inner and outer gears operatively installed in the gear receiving recess. The inner and outer gears are of a bevel type and meshed with each other in such a manner as to bias the inner gear in a direction to reduce the thickness of the passage part when the inner gear is rotated while turning the outer gear therearound.

Abstract: A vane pump is composed of a casing having a cylindrical inner bore and a rotor disposed in the inner bore with an eccentric relation to the inner bore. A circular pump chamber formed between the rotor and the inner bore is divided by vanes disposed in the rotor into plural pump chambers each changing its capacity according to rotation of the rotor. The vane is slidably disposed in a groove formed in the rotor in a slanted relation with respect to a rotational axis of the rotor. When the rotor rotates, the vane is pushed backward of the rotational direction by fluid in the pump chamber. The pushing force includes a component for pushing the vane upward toward an upper plate closing an upper opening of the inner bore. The vane is pushed against the upper plate to thereby prevent hitting noises between the vane and the upper plate.

Abstract: Disclosed is a gas compressor capable of preventing generation of noise due to the vibration during the rotation of the rotor. A rotor rotating in a cylinder around a rotation shaft has five radially extending vane grooves, each of which supports a vane. The respective directions of the vane grooves are determined such that the respective angular differences between at least three adjacent compression chambers are not less than 5 degrees. Thus, the angular intervals in terms of direction between the vanes supported by the vane grooves are also different from each other. As a result, the timing with which the vanes pass the outlet port is irregular, and the discharge period is thus unequal between a plurality of compression chambers, whereby the periodicity of the vibration based thereon is reduced, and the peak values of the basic vibration component are reduced.

Abstract: A turbine tool design with a number of innovative aspects which may be incorporated into the tool individually or as a group. One aspect relates to improved speed control, based on an elastically deformable governor member disposed within the rotating impeller assembly and having a substantially uniform cross-section. Another aspect relates to a overspeed safety configuration that employs secondary, or “retro”, nozzles that are enabled when the elastically deformable governor member is removed from the impeller assembly. Another aspect relates to routing the motive fluid exhaust through the operator-adjustable throttle assembly. Still another aspect relates to an approach to axially preloading the bearings supporting the rotating shaft of the impeller assembly.

Abstract: A compact high efficiency vane pump is disclosed having a unique T-shaped vane and rotor slot configuration with a roller tip vane in a uniquely configured chamber. To minimize friction in chamber diameter, a pressure plate is provided which is hydraulically balanced, both in the forward and reverse pump and motor modes, having micro pressure pulses which vary multiple times per rotor rotation in order to compensate for varying hydraulic axial load on the housing.

Abstract: A rotary paddle pump with sliding vanes and stationary side plates fabricated from a continuous carbon-fiber reinforced polymeric material, particularly polyetheretherketone (PEEK), polyetherketoneketone (PEKK), or polyphenylene sulphides (PPS) material yields characteristics of self-lubrication for dry operation, low wear for long life, and high flexural and tensile strength for superior resistance to foreign object damage. Other parts manufactured from continuous carbon-fiber reinforced polymeric composite may be alternately substituted to provide self-lubrication and low wear on surfaces moving relative to each other.

Abstract: A rotary paddle pump with sliding vanes and stationary side plates fabricated from a continuous carbon-fiber reinforced polyetheretherketone (PEEK) material yields characteristics of self-lubrication for dry operation, low wear for long life, and high flexural and tensile strength for superior resistance to foreign object damage. Other parts manufactured from PEEK may be alternately substituted to provide self-lubrication and low wear on surfaces moving relative to each other.

Abstract: A compact high efficiency vane pump is disclosed having a unique T-shaped vane and rotor slot configuration with a roller tip vane in a uniquely configured chamber. To minimize friction in chamber diameter, a pressure plate is provided which is hydraulically balanced, both in the forward and reverse pump and motor modes, having micro pressure pulses which vary multiple times per rotor rotation in order to compensate for varying hydraulic axial load on the housing.

Abstract: A positive-displacement piston mechanism includes a small rotor integrated with a main axis and biased against a cylindrical large rotor for holding a bearing-housing. Slant sliding slots are formed at facing places in equally divided space between the large rotor and the small rotor. Vanes having an angle are fitted into the slots as if they were bridges, and an inlet and an outlet are provided on side-housings.

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: 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 chamber 80. The high pressure chamber 80 is in contact with inlet ports 74 accessing a cylinder 72 within the device 10. The cylinder 72 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: A rotary compressor, such as a sliding vane compressor, comprises a housing having a bore, a rotor assembly operatively arranged to rotate within the bore, vanes operatively arranged at the rotor assembly to move linearly relative to the rotor assembly and to form, together with the housing and rotor assembly, variable chambers, and a valve assembly arranged in the housing. The bore has a configuration divided into a expansion region of elliptical shape, a circular transition region, a polynomial-shaped compression region and a circular sealing region. The lubricant seal is composed of an oil injection port and oil grooves for trapping and transporting the oil. The valve assembly is provided in a recess portion of the housing and is configured as a thin blade covering each discharge port which has been relieved to minimize undesirably large difference of the pressure forces between the two sides of the blade. Oil grooves are provided in the rotor assembly and in end cap assemblies.

Abstract: A rotary vane compressor or vacuum pump having an extended service life in which the rotor housing is composed of cast iron, the rotor of either cast iron or powder metallurgy materials, and the associated adjacent surfaces which form the rotor chamber are coated with a material having the characteristics of plastic with respect to friction and abrasion resistance.

Abstract: A rotary compressor comprising a cylindrical stator, a rotor rotatably mounted within the stator defining a number of stator chambers, a plurality of gas-blocking vanes equiangularly disposed between the inner peripheral surface of the stator and the outer surface of the rotor, wherein the outer peripheral surface of the rotor is formed with a plurality of wavy compressive surfaces and the center line of said vanes are not aligned with the center of the rotor so as to make the pressure angle between the vanes and the rotor approach 0.degree. during the performance of the compression work, so that the frictional resistance formed between the rotor and the vanes will be reduced to the minimum.

Abstract: A rotor for a rotary compressor having a metal central portion integral with two opposite end portions that are fiber-reinforced metal matrix composites having a matrix metal common to the central portion. Such rotors may be made by pressing inorganic fibers to form the end portions of the rotor, arranging the end portions in an opposing relationship in a mold to form the central portion between the end portions. Molten metal is placed into the mold such that it infiltrates the porous end portions while forming the central portion. Solidification of the metal forms fiber-reinforced metal-matrix composite end portions integral with the central portion.

Abstract: A vane for a hydraulic vane pump, with the vane being adapted to be inserted, with sliding movement, into a guide slot provided in a rotor so as to be symmetrical and parallel to a central plane of the slot. The plane forms a setting angle at an outer jacket of the rotor together with an axial plane containing the rotor axis so that an opening of the slot located at the outer jacket of the rotor leads the bottom of the slot in a direction of rotation. A convex sliding sealing surface cooperates with inner jacket of the stator and a pressure surface is located in the plane directed toward a bottom of the slot. A crown of the sliding sealing surface is displaced, with respect to the principle plane of the vane, in a direction opposite the rotational direction of the rotor. The sliding sealing surface forms, in a direction of rotation of the rotor, a wedge-shaped transistional area located at a plane which forms a complimentary angle combined with an addendum angle to the principle plane of the vane.

Abstract: A rotary vane type compressor having a rotor (8) mounted with a number of vanes (10) each accommodated in a vane groove (11) of a liner (12) made of anti-abrasive material and a boss (13) for fixing the liners (12) and the liners are fixed in position with respect to the boss by integrally casting the liners and the boss by placing them in the predetermined position using light weight alloy.

Abstract: A drive apparatus incorporating a rotor rotatably received within the hollow interior of a cylindrical box which is in turn rotatably received within a cylindrical chamber defined within a casing. The rotor is eccentrically positioned within the concentric box and chamber with the rotor including a plurality of selectively extensible and retractable segments for selective engagement with the interior of the cylindrical box upon a rotational driving of the rotor in response to the introduction of pressurized fluid.

Abstract: In a vane type rotary fluid pump or compressor, a plurality of vanes are slidably fitted in the body of a rotor at an angle with a radial plane passing through the axial center line of the rotor to move radially outwardly from the rotor in a direction opposite to the direction of rotation of the rotor. Each tip of the vanes is provided with a flat surface frictionally guided by a cylindrical inner wall of a stator housing and a taper surface extending from the front end of the flat surface toward the direction of rotation of the rotor. The flat surface of the vane has a predetermined width sealingly in contact with the inner wall of the stator housing.

Abstract: To allow a large built-in volume ratio of a vane type compressor, the outer circumferential surface of the rotor is provided in each working chamber with an indentation located next to the leading one of the two vanes partly defining the chamber, thereby increasing the through-flow area of the outlet space of the chamber through which it communicates with the stator's outlet port during the exhaust of compressed gas from the chamber.