Abstract: A submersible water pump and a dewatering system comprising the submersible pump. The submersible water pump includes a housing and an outer tube. The housing includes a housing dividing wall and a cylinder head having a bore therethrough through which the outer tube fits. The housing is in slidable engagement with the outer tube and the housing dividing wall. The dewatering system with the submersible pump is used to pump water from vertical coal bed methane wells.

Abstract: A washer pump includes a case partitioned into a motor chamber, which accommodates an armature rotated when it is electrically energized, and partitioned into a pump chamber, which accommodates an impeller rotated being coupled to an armature shaft of the armature, wherein washing liquid is sucked into the pump chamber from a liquid suction port, which is communicated with the pump chamber, by the rotation of the impeller, and the washing liquid is discharged from a liquid discharge port which is communicated with the pump chamber, and the washer pump is characterized in that: a ventilation hole is provided on a partition wall to partition the pump chamber and the liquid suction port, a filter for filtering the washing liquid is detachably attached to the liquid suction port, an air passage is provided in the filter, and the air passage is communicated with the ventilation hole.

Abstract: A zero maintenance pump includes a motor having a motor housing and a motor drive shaft rotatably mounted in the motor housing. A shaft extension is coupled to the motor drive shaft distal from the motor housing. A coupling element has a body with a first end and a second end opposite the first end. The body includes a body wall defining an interior and an exterior. At least one slot is formed in the body wall. The coupling element includes a flange coupled to the body wall proximate the first end. The coupling element is coupled to the motor housing at the flange proximate the motor drive shaft and the coupling element is disposed over the shaft extension. A mesh element is coupled to the body wall at the exterior. A pump is coupled to the coupling element proximate the second end.

Abstract: An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including first and second gerotors. The first gerotor is driven by the working fluid. The second gerotor is rotated by the first gerotor. The two gerotors are connected with a common shaft. The tool body has flow conveying portions that mix the working fluid and the produced oil as the oil is pumped.

Abstract: A thin air processing device suitable for wall mounting comprises a housing and located inside a crossflow blower, an air processing unit and a controller unit. The housing comprises a cover plate, a base and side parts. The blower comprises a casing, an impeller, an electric drive with a flat stator and a magnetized rotor, and an axle fixed perpendicularly to the base. The casing comprises an inlet, a central part and an outlet and integrated with the housing thus a volute shape of the casing formed by side parts. The impeller comprises circumferential arrayed magnetic means thus serving as the magnetized rotor. The flat stator comprises circumferential arrayed coils with magnetic axes coincide with a plane of the flat stator and integrated with the housing. The air processing unit located at the inlet of the casing and comprises an intake and an outtake openings.

Abstract: A dust shield for a refrigeration condenser fan motor includes a shroud having an opening for a motor output shaft, and a hub extending from the shroud. The shroud forms an enclosure to prevent contaminants from interfering with operation of the motor. The hub includes spring members that are displaced by the output shaft as the output shaft is inserted through the dust shield and applying a force to the shaft to hold the shield in place.

Abstract: An enclosure for handling hazardous material includes a sealable housing which is configured with a first air inlet connected to a bubble gauge and a second air inlet disposed inside the housing for air evacuation from the housing is connected to a pump for maintaining subatmospheric pressure in the enclosure and for drawing a stream of air inwardly through the first air inlet via the bubble gauge into the housing and out the second air inlet. A filter interposed in the stream of air leading to the second inlet. At least one glove port is formed in the housing and has a flexible relatively gas impermeable glove connected thereto. An air exchange port in the housing is operably connected to a sealed bellows which provides for changes in air volume within the enclosure which occurs from moving the glove within the enclosure under subatmospheric pressure.

Abstract: An electric fuel pump includes a pump proper (1) having a pump body (2) that includes an induction orifice (3), a delivery orifice (4), and electrical terminals (5,6). A cage (7) is arranged around said pump body. A filtering element (15) is connected to the cage and communicates with the induction orifice. A tubular vibration damping element (16) is arranged about the cage. A pump casing (17) is assembled about the vibration damping element so that the vibration damping element is disposed between the pump casing and the cage to prevent contact.

Abstract: An axial-flow fan has a plurality of main fins (702), and auxiliary fins (703) provided between the main fins (702), where the position of a front end of the auxiliary fin (703) relative to X axis and the position of a front end of the main fin (702) adjoining the auxiliary fin in reverse-rotary direction are aligned, the height of the auxiliary fin (703) is approximately three fourths of the height of the main fin (702), and the cross sections of the main fin (702) and the auxiliary fin (703) taken along the axial direction of the main shaft are streamlined.

Abstract: A tile flood pump for attachment to a tile or drain pipe and pumping water from a field through the tile or drain pipe to a drainage ditch or canal. The tile flood pump is characterized by a cylindrical pump housing fitted with a flange for removably bolting to the existing tile or pump embedded in a levee or dike separating the field from the drainage canal and a cylindrical impeller housing enclosing one or more shaft-mounted rotating impellers, the impeller housing extending into the pump housing in angular relationship for pumping water from the field through the pump housing and the tile and into the ditch. A pump housing flapper valve on the intake end of the pump housing can be selectively open or closed by a control rod mechanism to facilitate a flow of water by direct drainage through the pump housing and the tile into the ditch, or for pumping water through the impeller housing, the pump housing and the tile when the water in the ditch is at a higher level than the water in the field.

Abstract: A blower includes a base having a transverse passage for receiving a motor therein and a fan device driven by the motor extends from a hole in an end of the base. A casing including an outlet is connected to the base and mounted to the fan device. An anti-back device is engaged in the outlet and includes a frame to which a plate is pivotably connected. The plate is opened by the air sent via the fan device in one direction and seals the outlet when air goes in opposite direction.

Abstract: In a fan housing, a surrounding wall extends uprightly from an inner surface of a base wall that is formed with a wire hole. A power wire, which is coupled to a fan motor mounted on the inner surface, extends through the wire hole. A wire-positioning unit includes a first positioning groove formed in an outer surface of the base wall and extending from the wire hole to the surrounding wall, a second positioning groove formed in an outer surrounding surface of the surrounding wall and extending from the first positioning groove such that the power wire extends along the first and second positioning grooves, a first anchoring member for anchoring the power wire in the first positioning groove, and a second anchoring member for anchoring the power wire in the second positioning groove.

Abstract: A pump for the transporting of fluids and/or of mixtures of fluids includes a housing (1) and at least one restrictor gap seal which is provided in the housing (1) to reduce the pressure in a restrictor gap along a rotatable part (2) of the pump, wherein the restrictor gap seal is formed as a brush seal arrangement (8). The brush seal arrangement (8) contains one or more individual brush seals (8′) which include as sealing members a plurality of sealingly arranged fibres, bristles and/or wires (8a) which are distributed and fastened in ring form and whose free ends extend towards the surface to be sealed.

Abstract: A fan guard 18 of an outdoor unit comprises an outer frame, a plurality of radiating ribs 27, and a plurality of annular ribs 28. The outer frame is disposed around the outer circumference of a lid member that is an air conditioner discharge port. The plurality of radiating ribs 27 are formed such that they radiate in the outer radial direction from the vicinity of the center of the outer frame 26 to the outer frame 26, and are curved in the rotational direction of a ventilation fan. The plurality of annular ribs 28 are integral with the radiating ribs 27, are concentrically disposed at a predetermined spacing in the radial direction around the center of the rotational axis of the ventilation fan, and are formed such that at least those in an outer circumference are slanted toward the outer radial direction to follow the flow of the air blown from the ventilation fan.

Abstract: A filter (8) for use with a fuel pump (1) has a filter body (9) and a filter element (10) coupled to the filter body. The filter body is adapted to be attached to the fuel pump and has an opening (9a) for communicating with an inlet channel (3b, 4b) of the fuel pump that opens in an outer surface of the fuel pump in a direction substantially perpendicular to a longitudinal axis (L) of the fuel pump. The filter element defines a filter chamber (10c) that communicates with the opening of the filter body. The filter element extends along at least a part of the outer surface of the fuel pump.

Abstract: A device for drawing fuel for a motor vehicle tank, the device comprising a drawing pump (100) and a fine filter (210) placed upstream from the pump (100), and wherein: the housing (200) of the filter possesses a degassing orifice (222) in the top portion thereof; the drawing pump (100) also possesses a degassing orifice (130); and the filter housing (200) is fitted with a duct (224) which extends the degassing orifice (222) of the housing (200), opens out into a cavity (220) common to the degassing orifice of the pump (100), and possesses a mouth (227) situated at a height that is equal to or lower than that of the degassing orifice (130) of the pump (100), said duct (224) being shaped so as to constitute a siphon suitable for conveying fuel around the mouth (227) to the inside of the filter housing (200) while the drawing pump (100) is being stopped.

Abstract: A suction diffuser comprising a housing 12 and a strainer element 11. The element 11 is arranged within the housing 12 with its axis in line with the direction of inlet flow into the strainer so that, in operation, incoming contaminated liquid flows first into the interior of the element 11 and then out through the element to the exterior thereof. Particles suspended in the liquid are retained within the element, where there is more space, and sink to the base of the element where they may be removed via a drain plug 15 in the housing 12. In this way the restricted space between the element and surrounding body of the strainer is kept free of material thus avoiding any resultant restriction of the flow.

Abstract: An underwater agitation pump comprises an impeller casing in which an impeller driven by a motor is rotatably accommodated, an agitated material suction guide cylinder of a hollow cylinder which has one-end opening portion thereof integrally communicably connected to a center suction opening portion of the impeller while passing through a center opening of the impeller casing and having the other-end opening portion thereof extended downwardly, the suction guide cylinder further forming an agitated material suction passage therewithin, and an agitator mounted on an outer peripheral portion of the other-end opening portion of the agitated material suction guide cylinder. Due to such a constitution, the agitated material suction passage formed in the inside of the agitated material suction guide cylinder can ensure a sufficiently wide agitated material inflow area.

Abstract: A ribbon drive pumping apparatus and method for substantially incompressible fluids, such as liquids, is disclosed. The pump has an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of helical coils is mounted in the tube for rotation and the frequency of the coils decreases from the first end to the second end of the tube. Substantially incompressible fluid is collected at the first end, an axial component of velocity is increased via the rotating ribbon, and the substantially incompressible fluid is ejected from the second end to provide pumping of the liquid. Additional fluid is added to an interior portion of the pump, preferably to a low pressure region, for various purposes such as mixing, cavitation prevention, increased throughput, etc.

Abstract: A pump housing (14, 16) has a fan guard (40) secured to the end of the housing by four crescent-shaped tabs (60) fitting into four crescent-shaped cast-in recesses (66) of the housing (14, 16) and ears (68) of the tabs (60) fitting into cast-in holes (70) in the housing (14, 16). The ears (68) and boles (70) on opposite sides of the housing (14, 16) are aligned along a common axis (80, 82). The ears (68) are tapered at their leading ends (90) and squared off at their trailing ends (92), and the guard (40) has a radial projection (56) that fits into an opening in the housing (14, 16).

Abstract: A tile flood pump for attachment to a tile or drain pipe and pumping water from a field through the tile or drain pipe to a drainage ditch or canal. The tile flood pump is characterized by a cylindrical pump housing fitted with a flange for removably bolting to the existing tile or pump embedded in a levee or dike separating the field from the drainage canal and a cylindrical impeller housing enclosing one or more shaft-mounted rotating impellers, the impeller housing extending into the pump housing in angular relationship for pumping water from the field through the pump housing and the tile and into the ditch. A pump housing flapper valve on the intake end of the pump housing can be selectively open or closed by a control rod mechanism to facilitate a flow of water by direct drainage through the pump housing and the tile into the ditch, or for pumping water through the impeller housing, the pump housing and the tile when the water in the ditch is at a higher level than the water in the field.

Abstract: A cooling fan dust guard has provided on the inner side of fan blades multiples of fins at equal distance from one another around the spindle to create disturbance as the fan blades rotate to outwardly expel the airflow so to prevent the airflow carrying dust an easy ingression of the dust into the spindle and help cool down the stator assembly.

Abstract: A multi-use clean air fan and fan motor mount assembly comprising a bifurcated conical air inlet and blown air deflector, a fan motor mount, motor mount supports, a fan motor and a fan, the bifurcated conical air inlet and blown air deflector having a long outer wall, and a short inner wall, the fan motor mount suspended within the bifurcated conical air inlet and blown air deflector by motor mount supports fastened between the outer wall of the bifurcated conical air inlet and blown air deflector and the fan motor mount, an aperture defining a central opening in the top of the bifurcated conical air inlet and blown air deflector, the fan and fan motor having a common longitudinal axis with the longitudinal axis of the bifurcated conical air inlet and blown air deflector, the fan having a series of vanes extending outwardly from the central longitudinal axis of the fan, the inside of the long outer wall of the bifurcated conical inlet and blown air deflector surrounding more than half of the longitudinal heig

Abstract: A cooling fan dust structure has provided on the end of the fan blade hood a recess that mutually forms an overcut height difference with a flange protruding from the peripheral of a motor base so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle as the fan blade unit rotates.

Abstract: An improved structure of rotation support of heat-dissipation fan comprising ceramic hollow tube bearing passes through and fixes on fan rotor and rotating with rotor, hollow or solid ceramic axle tube passes through the inside of bearing and rotating freely or fixed to fan body to provide low friction and high speed rotation. Exterior surface of bearing is formed or ground to provide better connection with rotor body while interior of bearing and exterior of axle tube are further processed to reduce surface contact area thereof lower rotational friction. This improved structure has achieved lower friction, lower noise, lower power consumption, longer life and higher speed.

Abstract: The present invention provides an electrical submersible pump assembly having a submersible pump, a submersible electrical motor drivingly connected to the pump, and a seal assembly disposed between the submersible pump and the motor. The seal assembly is generally of tubular construction and provides fluid communication between the seal assembly cavity and the motor, such fluid communication being in a circuitous path effecting gravity segregation of contaminants including particulate solids in wellbore fluids. The seal assembly thereby controls and minimizes migration of the contaminants into the body of the seal section and on into the motor.

Abstract: A cooling fan dust guard has provided on the inner side of fan blades ribs and recess that mutually form an overcut height difference with a bushing opening so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle.

Abstract: A motor drives a fan that creates airflow in an air conditioning system. The motor includes a cup-shaped motor holder and a yoke received inside of the motor holder. The motor holder has a peripheral wall and an open end at one end of the peripheral wall. The yoke has an open end adjacent to the open end of the motor holder. The open end of the yoke has a flange that extends radially outwardly. An outer peripheral end of the flange is positioned radially outward of the peripheral wall of the motor holder.

Abstract: In a fluid pump device, a filter is secured to a housing. A meshed portion of the filter substantially covers an inlet opening of the housing. Each engaging projection of the filter is engaged with a corresponding engaging recess of the housing in a direction perpendicular to an axial direction of an impeller. Arm portions of the filter substantially perpendicularly extend with respect to a meshed portion of the filter and are resiliently flexible in the direction perpendicular to the axial direction of the impeller. Each coupling projection of the filter is provided between adjacent two arm portions of the filter and is engaged with a corresponding coupling recess of the housing in the axial direction of the impeller.

Abstract: A cooling fan dust guard has provided on the inner side of fan blades ribs and recess that mutually form an overcut height difference with a bushing opening so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle.

Abstract: A cooling fan dust structure has provided on the end of the fan blade hood a recess that mutually forms an overcut height difference with a flange protruding from the peripheral of a motor base so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle as the fan blade unit rotates.

Abstract: A ribbon drive pumping apparatus and method for liquids is disclosed wherein the inherent centrifugal separation that occurs adjacent the pump inlet is used to remove contaminants. The pump has an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of helical coils is mounted in the tube for rotation and the frequency of the coils decreases from the first end to the second end of the tube. Liquid is collected at the first end, contaminants are centrifugally separated and sorbed or bled off, an axial component of velocity of the liquid is increased via the rotating ribbon, and the purified liquid is ejected from the second end to provide pumping of the liquid. A central opening helps decrease cavitation and can be useful for pumping live fish.

Abstract: A pump bushing device that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing device, including a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump; a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore; and a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.

Abstract: An electrical non-priming submersible pump including a motor assembly that has a motor coupled to a shaft. The shaft has impellers formed thereon for propelling water. Also included is a housing assembly that surrounds the motor assembly. The housing assembly has an intake area that includes a multilayer sediment protection system that prevents the introduction of debris into the housing. The multi-layer sediments protection system includes a first plurality of slots positioned around the circumference of the housing assembly and a screen position in juxtaposition in relation to the first plurality of slots.

Abstract: A pump impeller having a central hub and circumferentially-spaced bottom vanes extending in a direction outwardly of the hub. An annular shroud surrounds the hub in outwardly-spaced relationship thereto and provides an impeller liquid inlet passage around the hub leading to the vanes. A permanent magnet motor rotor is mounted on the annular shroud. The rotor is used in a sump pump having an upper cylindrical filter that encloses a float switch for operating the pump motor.

Abstract: This circulation device is equipped with a water impeller that is larger than and tightly fitted over the top of the draft tube through which the water from the pond or reservoir is drawn. By placing the impeller above and out of the draft tube it enables to lift water through the draft tube and imparts a centrifugal force on the water above the impeller which aids in moving the water radially outward from the impeller. The water is directed outwardly over a large diffuser plate that is centrally located. The outer edge of the diffuser plate is equipped with a laminar flow diffuser lip which is designed to inhibit the passage of water from the diffuser plate to the open water. This design ensures that most of the energy imparted to the water by the impeller is retained once it leaves the diffuser plate, making the invention operate efficiently.

Abstract: This circulation device is equipped with a water impeller that is larger than and tightly fitted over the top of the draft tube through which the water from the pond or reservoir is drawn. The water drawn up and directed outwardly over a large diffuser plate that is centrally located within the invention. The outer edge of the diffuser plate is equipped with a laminar flow diffuser lip which is specifically designed to inhibit the passage of water from the diffuser plate to the open water as little as possible. Additionally, a means of providing a floating water circulation apparatus with the ability to operate effectively in weather conditions in which a layer of ice is likely to form over the diffusor plat of the apparatus in the nighttime hours is provided.

Abstract: The present invention provides a device for drawing-off fuel from a motor vehicle tank, the device comprising a drawing-off pump and a fine filter placed upstream from the pump, wherein the drawing-off pump is a brush-less pump.

Abstract: A pump inlet fitting for a wet/dry vacuum cleaner is disclosed. The pump inlet fitting frictionally attaches a pump inlet assembly to an inner surface of an intake tube of a wet/dry vacuum cleaner. The pump inlet fitting includes a plurality of radially extending barbs which frictionally engage the inner surface of the intake tube to a degree sufficient to secure the pump inlet assembly to the intake tube without the need for costly and time consuming external clamping mechanisms.

Abstract: A feeding device for feeding fuel, comprising a feed pump, an electric motor driving the feed pump, filtering means, a housing composed of synthetic plastic and formed as a filter casing for receiving the electric motor, the feed pump and the filtering means, the filter casing having concentric housing walls, and a metal jacket arranged at the concentric housing walls at least at one side.

Abstract: A fuel pump isolation assembly for a fuel pump of a vehicle includes a fuel pump and an isolation housing having a fuel pump cavity extending axially therethrough to receive the fuel pump. The fuel pump isolation assembly also includes a plurality of flex arms extending from the isolation housing and into the fuel pump cavity to engage the fuel pump and allow radial movement of the fuel pump during its operation.

Abstract: This circulation device is equipped with a water impeller that is larger than and tightly fitted over the top of the draft tube through which the water from the pond or reservoir is drawn. By placing the impeller above and out of the draft tube it enables the present invention to lift water up through the draft tube and imparts a centrifugal force on the water above the impeller which aids in moving the water radially outward from the impeller. The water is then directed outwardly over a large diffuser plate that is centrally located within the invention. The outer edge of the diffuser plate is equipped with a laminar flow diffuser lip which is specifically designed to inhibit the passage of water from the diffuser plate to the open water as little as possible. This design feature ensures that most of the energy imparted to the water by the impeller is retained once it leaves the diffuser plate, making the invention as a whole operate more efficiently.

Abstract: A multi-use clean air fan and fan motor mount assembly comprising a bifurcated conical air inlet and blown air deflector, a fan motor mount, motor mount supports, a fan motor and a fan, the bifurcated conical air inlet and blown air deflector having a long outer wall, and a short inner wall, the fan motor mount suspended within the bifurcated conical air inlet and blown air deflector by motor mount supports fastened between the outer wall of the bifurcated conical air inlet and blown air deflector and the fan motor mount, an aperture defining a central opening in the top of the bifurcated conical air inlet and blown air deflector, the fan and fan motor having a common longitudinal axis with the longitudinal axis of the bifurcated conical air inlet and blown air deflector, the fan having a series of vanes extending outwardly from the central longitudinal axis of the fan, the inside of the long outer wall of the bifurcated conical inlet and blown air deflector surrounding more than half of the longitudinal heig

Abstract: A vacuum pump with dust collecting function is proposed to deal with the case where dust produced by a process of productions by reaction in a processing vessel under vacuum may to enter a vacuum pump. During evacuation of a processing vessel by a vacuum pump, an auxiliary dust collecting path is closed by a shut-off valve and evacuation through a main exhaust path is carried out. During a period in which evacuation by the vacuum pump is not necessary, the auxiliary dust collecting path is open to form a circulation path with the main exhaust path to carry out collection of the dust by a dust separator.

Abstract: A pump system for a helicopter tanker includes an axial flow electric pump coupled to a lower end of a snorkel having a generally tubular pump housing extending along a central axis between an open upper end and an opposite open lower end serving as an inlet of the pump. An in-line electric motor is supported within the housing along the axis and has an output drive shaft mounting an impeller. A filter screen basket is mounted on the lower end of the housing to filter water for filtering the incoming water. An electric power cable extends from the motor through a the housing and is shrouded externally by a protective metal cable guard.

Abstract: A motor protector for use in protecting an electric motor in a subterranean environment. The motor protector utilizes a dual chamber system for absorbing the expansion and contraction of the internal fluids of a submergible electric motor. One of the chambers provides for the expansion and contraction of the internal fluids of a submergible electric motor. The other chamber is in fluid communication with the subterranean environment. A gas pocket is disposed within the motor protector between and in fluid communication with both of the dual chambers. The volume of gas couples the fluid pressure of the subterranean environment to the internal fluids of the electric motor without direct contact between the internal fluids of the electric motor and fluids from the subterranean environment.

Abstract: A filtering pump assembly for pumping and filtering a fluid includes a pump subassembly and a filter subassembly. The pump subassembly has an inlet portion with a first cross-sectional shape. The preferred cross-sectional shape of the inlet portion is circular. The filter subassembly includes a foraminous cage member, having an opening formed therein of a shape corresponding to the first cross-sectional shape of the inlet portion and being configured to fit engagably thereon. The filter subassembly also includes a filter element formed of a porous material for placement in covering relation to the cage member. The preferred filter element is either bag-shaped or formed as a cylindrical sleeve. Preferably, the filter assembly includes a retainer for retaining the filter element in covering relation to the cage member. The retainer may be an annular spring clip having two ends which overlap one another, and having a finger grip formed at each end thereof.

Abstract: An electric bilge pump for collecting liquid found in a bottom of a vessel or any other place. The pump is formed of three parts in axial alignment. The assembly is secured to a surface in substantially a horizontal position. An electric motor is enclosed in a cylindrical jacket and has an output shaft with an impeller at its distal end. A second part of the housing is tubular and defines a chamber with the impeller in the chamber. The chamber has an axial inlet with a tangential outlet. A filter is fitted over the inlet to filter out any unwanted debris.

Abstract: A fan suitable for use in a refrigerator includes a motor frame having a bracket insertion hole, a bracket including a cylindrical portion fitted into the bracket insertion hole so as to project from the motor frame and a bearing, a stator including a stator core, a stator coil wound on the stator core, and a molded layer molded from a synthetic resin so as to cover the stator core and the stator coil, the stator being disposed on an outer periphery of the cylindrical portion projecting from the bracket insertion hole so as to be supported by the cylindrical portion and the motor frame, a rotor including a rotational shaft inserted into the cylindrical portion so as to be rotatably mounted via the bearing on the bracket and having both ends, a rotor yoke disposed on one end of the shaft opposite to the motor frame so as to cover the stator, and a rotor magnet disposed on an inner circumferential face of the rotor yoke so as to be opposed to an outer circumferential face of the stator core with a gap between t