Abstract: A fluid pumping system comprises a housing, an electric motor, a rotatable first input, a rotatable second input driven by the electric motor, a gerotor including an inner rotor, an outer rotor; and a cam ring in sliding receipt of the outer rotor. The cam ring is selectively rotatable by one of the first input and the second input. The inner rotor is rotatable by the other of the first input and the second input. The housing includes a first fluid inlet passage on a first side of the cam ring and a second fluid inlet passage on an opposite side of the cam ring. Fluid entering a cavity between the inner rotor and the outer rotor flows parallel to the axis of rotation of the first input. The cam ring includes a radially extending outlet port and pumped fluid flows radially out of the cavity.

Abstract: A fuel pump unit includes a suction filter and a fuel pump. The fuel pump includes: a rotatable shaft placed along a rotational axis; a rotor portion that rotates in response to rotation of the rotatable shaft; a suction hole portion, through which the fuel is suctioned into an inside of a rotor receiving chamber; and an outer peripheral wall that surrounds the suction hole portion. The suction filter includes: a filter element that filters the fuel and conducts the filtered fuel into an inside space; and a columnar hole portion having an inner peripheral wall, while the outer peripheral wall and the inner peripheral wall are fitted with each other, so that the columnar hole portion communicates between the inside space and the suction hole portion. The columnar hole portion is placed such that the rotational axis extends on an inner side of the inner peripheral wall.

Abstract: A vane-type gas pump includes a pump housing which forms a pump chamber in which a pump rotor with at least one slidable sliding element is rotatably mounted. At least one fluid inlet opening and at least one fluid outlet opening are dedicated to the pump chamber. The pump housing includes a closed stroke ring, a first separate thrust washer, and a second separate thrust washer. At least one stroke ring adjustment device axially clamps the closed stroke ring directly to the first separate thrust washer. At least one separate housing clamping device axially clamps the first separate thrust washer, the closed stroke ring, and the second separate thrust washer together.

Abstract: A uniaxial eccentric screw pump includes: a stator 32 having a female threaded inner peripheral surface; a rotor 33 configured to be insertable into the stator 32, and formed of a male threaded shaft body; an exterior body 31 configured to be movable between a first position where the exterior body 31 is capable of compressing the stator 32 and a second position where the exterior body 31 at least alleviates a compression state of the stator 32; and guide members 55, 56 configured to restrict a movement of the exterior body 31 in a circumferential direction of the stator while allowing a movement of the exterior body 31 in a radial direction of the stator by guiding an end portion of the exterior body 31.

Abstract: An oil pump having a pump housing with a suction-side inlet and with a pressure-side first outlet, which is coupled to a first pump chamber, and with a pressure-side second outlet, which is coupled to a second pump chamber having a first pump rotor which is situated in the first pump chamber so as to be rotatable about a first axis, and having a second pump rotor which is situated in the second pump chamber so as to be rotatable about a second axis, wherein the pump rotors are arranged in a plane, oriented substantially perpendicular to the axes of the pump housing and are coupled by way of an external circumferential toothing.

Abstract: The present disclosure is for a vibratory downhole rotary apparatus. The apparatus includes a cylindrical hollow body, a stator disposed within the cylindrical hollow body and a rotor disposed within the stator. The apparatus also includes a flow resistance system to vary the resistance of fluid flow through the apparatus to increase and decrease backpressure across the apparatus.

Abstract: An artificial lift system provides a lifting mechanism located in a well. The lifting mechanism communicates with a remote intake that is located below in the well. A compressed gas source provides compressed gas to the well annulus at a pressure that is sufficient to move the well fluid from the remote intake up to the lifting mechanism. The well has an annulus and tubing. The well has isolation elements that isolate the producing formation from compressed gas in the annulus. Various sources of compressed gas can be used such as a compressor, an accumulator or a gas sales line. A controller is provided to control the intermittent application and removal of compressed gas in the annulus and also to control the operation of the lifting mechanism. The well could be a horizontal well or a vertical well. The well could be a cased hole or an open hole well.

Abstract: A method for adjusting the compression in the vane cell chambers in the compression region of a vane cell pump for conveying pasty substance, in particular sausage meat, and a corresponding vane cell pump, wherein the compression is adjusted by changing the guide of the vane.

Abstract: An oil pump includes a housing including a rotor receiving portion at an inner side and an inner rotor accommodated in the rotor receiving portion formed at the housing. The inner rotor includes a plurality of outer teeth sequentially arranged at an outer peripheral side and integrally rotating about a first rotational center with a drive shaft. An outer rotor is also accommodated in the rotor receiving portion and includes a plurality of inner teeth sequentially arranged at an inner peripheral side, the outer rotor rotating about a second rotational center eccentric relative to the first rotational center by a predetermined amount in relation to rotations of the inner rotor in such a manner that the inner teeth and the outer teeth engage with each other. A restriction portion restricts an operating range of the outer rotor in a direction perpendicular to an eccentric direction.

Abstract: A variable displacement vane pump has a pump body, a driving shaft rotatably supported by the pump body, a rotor rotatably driven by the driving shaft, a plurality of vanes radially extendably installed in respective slots arranged in a circumferential direction in the rotor, a cam ring rockably provided inside the pump body and forming a plurality of pump chambers at an inner circumference side of the cam ring in cooperation with the rotor and the vanes. At an outer circumference side of the cam ring inside the pump body, a seal member is provided and defines a first hydraulic pressure chamber located at a side where a pump discharge amount increases and a second hydraulic pressure chamber located at a side where the pump discharge amount decreases. Then, a control valve controls only a pressure of the second hydraulic pressure chamber.

Abstract: A stator for an eccentric spiral pump comprises a hollow body of an elastic material which has a casing comprising a plurality of segments extending in a longitudinal direction of the casing. Adjacent segments are interconnected along longitudinal sides at variable angles to each other, so that the segments enclose an entire circumference of the casing. Surfaces of the segments are of a planar configuration, so that a closed casing of polygonal cross-section is formed by the interconnected segments. The hollow body of elastic material is of a matching polygonal cross-section to achieve positive contact with the casing.

Abstract: A scroll type fluid machine which can practically exhibit an appropriate meshing condition between an orbiting scroll member and an unorbiting scroll member and which can enhance the energy efficiency.

Abstract: A filling member-less internal-gear unit has a casing with a bearing ring which is accommodated movably in a bore in the casing transversely with respect to its axis but non-rotatably. An internally toothed annular gear is rotatably mounted in the bearing ring and meshes with a pinion rotatably mounted in the casing. The bearing ring is pivotable relative to the bore in the casing about a pivot axis parallel to its axis. The pivot axis is so disposed that the ring portion of the bearing ring, which is associated with the engagement-free annular gear region, is moved at least approximately radially towards the pinion axis by the hydraulic pressure forces acting on the annular gear in the pressure chamber.

Abstract: The machine includes a fixed disk (2) comprising a spiral wall (3), a mobile disk (4) also comprising a spiral wall (5) cooperating with that of the fixed disk, and means (11, 16, 22, 23) for driving circular translation movement of the mobile disk, the mobile disk being positioned axially by a system including a shoe (25, 32, 36) rubbing between two lateral abutments (26, 27-34, 35-39, 40), one member of the pair of members (i.e.

Abstract: The invention concerns a vane pump for conveying bulk substances, in particular meat pastes, having a housing (4) with an inlet (6) and an outlet (10) for the bulk substance. Disposed inside the housing (4) is a rotor (14) displaying a rotatably-journaled, central driving element (16) and several moving vanes (20a to j), which are arranged on the central driving element, in its direction of rotation (C), one behind the other and at an angle to the direction of rotation (C), and commonly surrounded by a limiting wall (24) of the housing (4) running about in the direction of movement (C) of the vanes (20a to j), with the limiting wall (24) forming conveying chambers for picking up (accommodating) bulk substances and, with rotation of the driving element (16), being moved in sequence past the inlet (6) and the outlet (10).

Abstract: A rotary fluid machine comprising a housing, a drive disk, a drive shaft, inner and outer cylindrical assemblies, and a plurality of vanes. The drive disk is supported within the housing for rotation about a first axis, and the drive shaft is connected to the drive disk to rotate that disk about the first axis. The inner and outer cylindrical assemblies extend within the housing, and the housing, the drive disk, and the inner and outer cylindrical assemblies form a working chamber that extends around, eccentric to, that first axis. The vanes are connected to the drive disc and are located in the working chamber to compress or to drive a fluid therein.

Abstract: A gear pump is provided with a pair of rotatable pumping gears for pumping fluid between inlet and outlet ports formed in a gear pump housing, wherein a portion of the housing is adapted for positional adjustment to reduce internal operating clearances and thereby regenerate pump output performance without requiring pump disassembly or rebuilding.

Abstract: In a vane pump, the cam ring must be fixed to an annular recessed portion of the housing in such a way that there exists no eccentricity between the cam ring and the rotor. To eliminate an eccentricity, a pair of semicircular grooves are formed on the inner circumference of the annular recessed portion diametrically opposed to the center thereof; a pair of semicircular grooves are formed on the outer circumference of the cam ring also diametrically opposed to the center thereof so as to provide two locating pin holes in cooperation with the two housing grooves, respectively; a pair of locating pins are pressure fitted, respectively, to the locating pin holes. Further, it is possible forcibly correct an eccentricity by selecting a locating pin having a diameter appropriately larger than that of the pin hole. The two locating pin holes are arranged in the direction of belt tension to eliminate the eccentricity due to belt tension.

Abstract: A positive displacement fuel pump utilizing an in-line pump and armature with a flexible drive connection and spring-pressed backing plate for the pump and short cantilever mount shaft for the pump rotor.

Abstract: An extrusion pump for slurries and the like of the Moineau type includes an elastomeric stator that is detachably mounted in a radially adjustable housing for radially adjusting the pressure of the stator on the rotor therein.

Abstract: A pneumatic rotary motor comprising a body to which is secured a bracer bushing closed by a cover. A deformable bushing is freely housed within the bracer bushing and is interposed between the cover and the casing. The bushing has a bore and two opposed longitudinal circular recesses extending from the bore. Two intermeshed rotary gears extend longitudinally in the bushing and are centered in a respective recess, the gears teeth sealably contacting the internal bushing along the circular recesses. The gears have shafts respectively supported for rotation in the cover and the casing and form opposed working chambers on either side of the recesses and in communication with openings provided in the cover for the intake and exhaust of a fluid. Screws, or the like, are mounted in the bracer bushing for abutting against the internal bushing to produce deformation thereof at the recesses for effecting sealed contact with the teeth of the gears.

Abstract: In a globoid worm type compressor or expander comprising a casing, a globoid worm rotor in the casing and pinions meshing with the worm rotor, provision is made to effect sealing between the thread of the worm and each tooth of the pinions. The arrangement is such that the pinion is mounted on its shaft with the intermediary of a resilient member so that each tooth may be slightly displaced in both circumferential and diametric directions whereby to adapt itself to the thread of the worm to provide gas-tight seal between the tooth and the thread of the worm.

Abstract: A fluid operable rotary piston device having a housing with gas inlet and tlet means and a hollow cylinder rotatable therein having gas inlet and gas outlet ports which communicate with the gas inlet and outlet means during rotation of the cylinder. A rotary piston is rotatable on an eccentric axis inside the cylinder and the cylinder and piston have interengageable means forming contact free working chambers. Axial sealing strips are mounted on one of the piston and cylinder and form contact free sealing gaps between adjacent working chambers. The cylinder rotates in the housing in contact free relation therewith and a transmission connects the piston and cylinder for rotation at respective speeds.

Abstract: A rotary internal combustion engine that includes a housing that defines an elliptical cavity in which a rotor is disposed. The rotor slidably supports a number of circumferentially spaced, radially disposed blades, with each pair of blades defining a chamber therebetween. The rotor is so rotatably supported in the cavity that the ratio of the intake chamber volume may be adjusted so that there is a minimum residual pressure on exhaust gases and the efficiency of the engine is increased as a result thereof.

Abstract: Bearing equipped mounting members for mounting a rotor within a rotor chamber of a rotary fluid pressure displacement device. The rotor chamber has axially spaced end walls, and a peripheral wall including a pair of diametrically opposed arcuate walls and a pair of circumferentially spaced radially inwardly opening recesses intermediate the arcuate walls. The rotor has a cylindrical surface of a diameter less than the diameter of the arcuate walls to provide greater than normal running clearance therebetween, and the mounting members are disposed within the recesses for running engagement with the rotor.