Abstract: An inflating/deflating device includes a fan unit disposed inside a main housing. A release valve assembly is connected to a deflating port of the main housing for fluid communication with a first air passage of the fan unit. An inlet valve assembly is connected to an inflating port of the main housing for fluid communication with a second air passage of the fan unit. A control unit is provided to control the release and inlet valve assemblies. The control unit is operable to switch a first or a second actuating position. The control unit actuates the fan unit and the inlet valve assembly to perform an inflating mode in the first actuating position, and actuates the fan unit and the release valve assembly to perform a deflating mode in the second actuating position.

Abstract: A foreign-body-proof or water-proof fan includes an impeller and a motor. The motor includes a rotor, a stator, a housing, at least one bearing and a spacer. The rotor has a shaft. The stator is disposed corresponding to the rotor. The housing supports for the stator and the rotor and has an axial hole, and the shaft passes through the axial hole. One end of the shaft protrudes out of the housing and is connected to the impeller. The bearing for supporting the shaft is disposed in the axial hole and securely disposed in the axial hole. The spacer loops the shaft and urges against the bearing.

Abstract: An electrical submersible pump assembly has a pump discharge head with an integrally formed pump discharge pressure port. The discharge head is mounted directly to the pump and couples the pump to production tubing. A static pressure port extends directly through the side wall of the discharge head. The pressure port includes a tubing connector for hydraulic tubing to run down to the guage. Inside the discharge head, a flow limiter is located in the pressure port to stop the loss of fluid if there is a break in the tubing connector or hydraulic line. Alternatively, the discharge head may incorporate a venturi or other pressure drop structure to allow the fluid flow to be measured via a pressure drop across an orifice. The venturi may be configured as an insert to permit it to be replaced after it has become worn by abrasive flow.

Abstract: A compact fan motor including a motor body having a tubular case accommodating a rotor, a permanent magnet, and brushes, and a pair of spring terminals that are connected to the brushes, sticks out from a peripheral wall of the tubular case, and has elasticity in a direction perpendicular to an axis of rotation of a shaft; an impeller fixed to the shaft sticking out from a front end of the tubular case; a holder having a case accommodating portion that is provided in a housing accommodating the motor body and impeller and has an inner wall surface extending in the direction of the axis of rotation of the shaft, and a motor body insertion opening provided at an edge of the case accommodating portion; and a pair of conductors provided on the inner wall surface of the holder while contacting with the spring terminals.

Abstract: A cover assembly for covering a vessel comprising a main cover comprising at least a first outlet opening adapted for connection to a pipe, and a second opening surrounded by a flat region adapted for placement of a gasket; an access cover comprising a flat region adapted for mating with the flat region of the main cover; and provisions for the sealing of at least one cord passing between the main cover and the access cover. In other embodiments, the cover assembly is provided with an engagement feature adapted for engagement with a hook-shaped hanger rod. Sewage basin assemblies are also provided which incorporate these cover assemblies.

Abstract: A supercharger with an electric motor includes, a turbine impeller rotationally driven by an exhaust gas, a compressor impeller rotationally driven by rotation of the turbine impeller, a compressor housing accommodating the compressor impeller, a turbine housing accommodating the turbine impeller, a shaft coupling the turbine impeller and the compressor impeller, a bearing housing rotatably supporting the shaft, an electric motor accommodated in an inside of the bearing housing for assisting rotation of the turbine impeller, and a power supply line extending from an inside to an outside of the bearing housing. The power supply line has one end portion connected to the electric motor, and the other end portion connected to a connector that receives electric power. The connector is installed at a position that is away from a side of the turbine impeller, and is less affected by heat of the exhaust gas.

Abstract: A mini-fan with an easy-starting structure is proposed, which includes a fan housing a rotor, and a bottom. The fan housing has a plurality of coils, a control unit, and at least one globe-shaped attractor, with the at least one globe-shaped attractor being made of conductive magnetic material and arranged between adjacent two of the coils. The rotor has a permanent magnet ring facing the coils of the fan housing and having at least one pair of opposite magnetic poles, with each magnetic pole providing a high-intensity area. Consequently, one of the high-intensity areas is attracted by and faces the at least one globe-shaped attractor when the rotor is held at a stop position.

Abstract: An exemplary embodiment of an air blower includes an electrically powered motor including a motor housing. A blower housing has first and second housing structures, each having inwardly facing, spaced ribs, and configured to surround the motor assembly in an assembled configuration. The ribs on the first and second housing structures register the radial and axial position of the motor housing inside the housing.

Abstract: A pump comprises a base (10), a case (20) fixed on the base, a rotor (30) received between the case and the base, and an inner stator (40) and an outer stator (50) accommodated in the case. The rotor is sandwiched between the inner stator and the outer stator. When the inner stator and the outer stator are energized to generate respective magnetic fields, the rotor is driven to rotate by turning torques that are produced by mutual actions between the rotor and the magnetic fields. Thus, the interior and exterior magnetic fields of the rotor can be utilized sufficiently, and an operation efficiency of the pump is enhanced accordingly.

Abstract: A pumping system including a first section and a second section. The first section includes a first housing having an axial bore formed therethrough and a protruding member formed on one end of the first housing, and a first shaft arranged within the axial bore of the first housing. The second section include a second housing having an axial bore formed therethrough and a recess formed on one end of the second housing for receiving the protruding member of the first housing, and a second shaft arranged within the axial bore of the second housing. An apparatus for compensating oil volume change in a motor, including a compensator housing having an open end for connecting to the motor, and a closed end; and a flexible bladder arranged within the housing and connected to the open end of the housing.

Abstract: According to some embodiments, systems for an integrated pump and reservoir may be provided. In some embodiments, a pump may comprise a housing defining an inlet to accept a fluid and an outlet to evacuate the fluid, an impeller disposed within the housing, wherein the impeller is to move the fluid toward the outlet, a motor to power the impeller, a reservoir hydraulically coupled to the inlet, and a cold plate disposed at least partially within the housing.

Abstract: A cooling device has a closed circulating channel for circulating coolant, and in the channel, a radiator and a contact-heat-exchanger type centrifugal pump are provided. A heat-producing electronic component contacts with the centrifugal pump, and the coolant in the pump collects the heat off the component due to the heat exchanging function. Then the heat is dissipated from the radiator. The pump includes a pump-casing made of highly heat conductive material and an impeller. The pump casing has a base wall and a cover wall opposite the base wall. The base wall has an outer wall face constituting a heat-receiving face, and an inner wall face facing the impeller. The impeller is disposed in a pump room defined between the base wall and cover wall of the casing. A sucking channel is provided between the heat-receiving face and an inner wall face of the pump room. This inner wall has a recess where protrusions extending toward the impeller or dimples are provided.

Abstract: A blower providing a blower mode and a vacuum mode. A casing provides a motor housing installing a motor and a fan housing installing a centrifugal fan rotationally driven by the motor. A partition is disposed and having a first surface defining a motor housing and second surface defining a fan housing. The fan includes a generally circular base plate having one surface in direct confrontation with the second surface. A plurality of base plate through-holes arrayed in an imaginary circle whose center is coincident with the rotation axis of the fan are formed in the base plate. The partition is formed with a plurality of partition through-holes arrayed in the imaginary circle and in selective alignment with the base plate through-holes in accordance with the rotation of the centrifugal fan. Each partition through-hole includes a width increasing region where a width of the partition through-hole in the circumferential direction is gradually increased toward the second surface.

Abstract: A single ended or double-ended blower includes a blower motor assembly supporting opposed first and second shaft ends. The first and second shaft ends have respective first and second impellers attached thereto and enclosed within first and second volutes, respectively. The first volute is connected to an inlet and the second volute is connected to an outlet. The blower motor assembly is supported in a chassis enclosure. A radially outer inter-stage path is between the first and second volute. The second volute is at least partially substantially concentrically nested with the radially outer inter-stage gas path.

Abstract: There is provided an external inline LPG fuel pump, and more particularly, an external inline LPG fuel pump; in which bushings are installed at first and second shafts of a motor to be fixed inside a housing, a ball is completely coupled to an end of the first shaft to prevent the motor from being shaken due to the bushings, and another ball is inserted into an end of the second shaft to fix the motor, thereby preventing the durability of the fuel pump from deteriorating by wear of a bushing part, a pumping part and an inside of the housing even though an LPG fuel is introduced when the motor is driven, prolonging the life of the fuel pump and reducing the repair and exchange costs involved with the fuel pump; in which a case inside which the housing is positioned is formed and a partition is installed inside the case, thereby cooling the high-temperature LPG fuel discharged through an outlet of the housing to reduce heat load and improving the durability of a device receiving the LPG fuel transferred from th

Abstract: A fluid metering/pumping device preferably includes a series of intermeshing gears. The fluid metering/pumping device includes an inlet port or area adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears diverge. The device further includes a pressure loaded floating shoe adjacent the intermeshing portion of each pair of gears within the series adjacent the point at which the pair of gears converge. The device further includes a piston subjected to discharge pressure at each discharge port which conveys hydraulic pressure to each floating shoe. The device is configured to convey liquid from a main inlet stream of liquid, through the inlet ports or areas, and out of one or more discharge ports at substantially equal rates.

Abstract: A drivehead for driving a drive string of a rotary pump or motor includes a bearing housing including lubricating fluid therein, a driveshaft extending through the bearing housing and connectable into drive communication with the drive string, and a concentric pump disposed in the bearing housing about the driveshaft, the concentric pump selected to pump the lubricating fluid through the bearing housing as driven by the driveshaft.

Abstract: The present invention provides an axial flow fan including an impeller that has a plurality of rotor vanes and is rotatable about a central axis, a motor that rotary drives the impeller, a base portion that supports the motor, a housing that has an intake vent, an exhaust vent, and an inner peripheral surface to surround the impeller and the motor, and a plurality of stator vanes that respectively connects the base portion and the housing, wherein the inner peripheral surface has a first inner peripheral surface formed to increase a distance from the central axis toward the intake vent or the exhaust vent in an axial direction, and there is formed a recess between the first inner peripheral surface and a stator vane that is included in the plurality of stator vanes and faces the first inner peripheral surface. According to the above described configuration, airflow is allowed to smoothly pass through the housing, resulting in a decrease in noise generated in the axial flow fan.

Abstract: A cover assembly for covering a vessel comprising a main cover comprising at least a first outlet opening adapted for connection to a pipe, and a second opening surrounded by a flat region adapted for placement of a gasket; an access cover comprising a flat region adapted for mating with the flat region of the main cover; and provisions for the sealing of at least one cord passing between the main cover and the access cover. In other embodiments, the cover assembly is provided with an engagement feature adapted for engagement with a hook-shaped hanger rod. Sewage basin assemblies are also provided which incorporate these cover assemblies.

Abstract: Some embodiments of the present invention provide a pump including a pump housing having an inlet adapted to fluidly couple with an inlet conduit, and an outlet adapted to fluidly couple with an outlet conduit. The pump also includes a pump shaft rotatably supported in the pump housing and a plurality of impellers coupled for rotation with the pump shaft. The pump further includes a motor removably coupled to the pump housing. The motor has an output shaft drivably coupled to the pump shaft. The pump also includes a spacer positioned between the plurality of impellers and the motor. The spacer includes at least one aperture to access and de-couple the output shaft and the pump shaft. The motor, spacer, pump shaft, and the plurality of impellers are removable from the pump housing as a single unit without disconnecting the inlet conduit and the outlet conduit from the pump housing.

Abstract: An end cap assembly for an in-tank fuel pump is configured to close an open end of a pump housing and includes an end cap body and a companion clip. On the bottom side of the end cap body facing the pump housing is a pair of motor brush wells for holding a pair of DC motor brushes. A pair of blind bores are provided to receive corresponding RFI suppression circuits. A pair of pockets are located in between the wells and the bores to allow flexible shunt wires to connect the RFI suppression circuits with the brushes. The clip is adapted for insertion into the bottom of the end cap body wherein a pair of axially-extending legs are guided into and seal the pockets. The captured shunt wires are electrically isolated in the closed pockets and contact with fuel is minimized.

Abstract: A compressor includes a shell formed from a piece of material having first, second, third, and fourth ends. The third and fourth ends extend between the first and second ends and are coupled to one another. The first and second ends form longitudinal ends of the shell. The first end includes an edge having first and second protrusions extending longitudinally outwardly therefrom. The edge includes a stepped region at a location where the third end extends longitudinally beyond a portion of the edge proximate the fourth end. A partition abuts the first and second protrusions, is coupled to the shell at the first end, and includes an opening therethrough. A compression mechanism is supported within the shell and includes a discharge passage in communication with the opening in the partition.

Abstract: An electrical submersible pump assembly has a motor cooperatively engaged with a pump for driving the pump and a motor lead extending to the motor for supplying power to the motor. The motor lead has an electrical conductor enclosed within a tube. The tube is sealed from an exterior environment of the motor and contains a dielectric fluid. The motor may be filled with a dielectric lubricant and the interior of the tube of the motor lead may be in fluid communication with the dielectric lubricant. Alternatively, the motor may filled with a dielectric lubricant and the dielectric fluid within the interior of the tube of the motor lead may be sealed from the dielectric lubricant.

Abstract: A sump draining apparatus having a pressure transducer engaged in a receptacle that is in turn engaged in an open-ended collar of a housing. The receptacle and thus the pressure transducer is slideable in the axial direction into and out of the open-ended collar. The housing is generally cylindrical and contains a pump and motor, each of which has a generally cylindrical shape and is axially stacked in the housing. A cord having a vent and electrical leads for the pressure transducer is releasably engaged via a cord restraint at one end portion of the housing and the pressure transducer is releasably engaged in the receptacle in the open-ended collar at the other end of the housing. The receptacle and sensor may be removed, serviced, and/or replaced without the housing being opened and without the pump and motor being removed.

Abstract: A mounting structure for mounting a device to an electric motor having an output shaft, the mounting structure comprising: a body including an opening for receiving the output shaft through the body, a plurality of connector elements supported by the body; and a plurality of threaded inserts, each of said inserts being inserted in one of said plurality of connector elements for receiving a fastener to connect the body to the motor; wherein each connector element is sized and shaped for alternatively receiving an insert in at least two, non-coincident locations within the connector element.

Abstract: A fuel supply device mounted on an automotive vehicle includes a fuel pump and a sub-tank containing the fuel pump therein. The sub-tank and the fuel pump are submerged in fuel contained in a fuel tank. Operation of the fuel pump is controlled in a switching manner thereby to supply the fuel contained in the fuel tank to an internal combustion engine. When the fuel tank is made of a resin material, electromagnetic noises generated in the switching operation of the fuel pump are emitted from the fuel pump through the fuel tank, interfering with radio waves received by a receiver mounted on an automotive vehicle. To shield such noises, the fuel pump is disposed in the sub-tank that is made of a metallic material and grounded to a body of the vehicle. In this manner, the noises from the fuel pump are surely intercepted.

Abstract: A two-stage vapor cycle compressor includes a first stage impeller, a second stage impeller situated adjacent to the first stage impeller, an electric motor running on a pair of foil bearings, a thrust disk including two foil bearings and being positioned between the second stage impeller and the electric motor, and a compressor housing enclosing the first and second stage impeller and the electric motor. A refrigerant vapor compressed by the first stage and second stage impeller flows through an internal passageway formed by the compressor housing and cools the foil bearings and the electric motor. The compressor may be a gravity insensitive, small, and lightweight machine that may be easily assembled at low manufacturing costs. The two-stage vapor cycle compressor may be suitable for, but not limited to, applications in vapor compression refrigeration systems, such as air-conditioning systems, for example, in the aircraft and aerospace industries.

Abstract: A self-cooling back-connect driver motor assembly includes a motor, a centrifugal fan and a driver. The motor includes a motor body and a spindle pivotally connected to the motor body and having its front and rear ends protruded from the motor body. The centrifugal fan is installed at a distal end of the spindle for driving the motor. The driver having a casing is installed on the motor body and sheathed onto the centrifugal fan, and the sidewall of the casing has air holes including air inlet holes disposed farther from the motor body and air outlet holes disposed nearer to the motor body. When the motor spindle is rotated, the centrifugal fan is used for dissipating the heat inside the motor driver.

Abstract: A motor-pump unit, in particular for a power steering system of a motor vehicle, comprises a housing, a pump, and a drive motor. The pump is constructed as a prefabricated pump module. Both the pump module and the motor are received directly in the housing.

Abstract: A housing for a hand held vacuum cleaner is so constructed that a suction motor mounting bracket which is enclosed by a lower housing section, is removably secured to an upper housing section. A suction coupling pipe section is either an integral part of or directly secured to the suction motor mounting bracket, so that forces introduced to a suction tool attached to the suction coupling pipe section are transmitted through the mounting bracket to the upper housing section thereby at least partly relieving the lower housing section from forces passing from the suction tool to the handle and vice versa.

Abstract: A cooling fan includes a fan housing (30) having a central tube (34) extending upwardly therefrom; the central tube has a bottom, annular protrusion (31). A bearing (61) is received in the central tube and mounted on the protrusion. A stator (20) is mounted around the central tube. A rotor (10) includes a shaft (18) having a free end (186) extending through the bearing and defining a notch (184) therein. A locking washer (63) engages into the notch of the shaft to limit movement of the shaft along an axial direction thereof. A balance structure (62) is arranged between the locking washer and the bearing. The balance structure is made of magnet and exerts a downwardly pulling force on the shaft to prevent the rotor from moving upwardly when the rotor is rotated.

Abstract: An electrically-driven compressor including a housing, an electric motor, a compression mechanism, a cover member, a motor drive circuit, and a sealing member is disclosed. The electric motor is accommodated in the housing. The compression mechanism is accommodated in the housing and operated by the electric motor. The cover member is attached to the housing. The housing and the cover member form an accommodation portion including an accommodation space therein. The motor drive circuit is accommodated in the accommodation space and drives the electric motor. The sealing member is arranged between the housing and the cover member to seal the accommodation space. The sealing member includes an elastic seal portion that comes into close contact with the housing and the cover member. A core sustains the shape of the seal portion in conformance with the circumferential edge of the accommodation space.

Abstract: A motor pump for a headlamp cleaner includes a motor, a control circuit board for driving the motor, an impeller rotatable by the motor, a plurality of terminal pieces adapted to be coupled to an outside connector, and a casing. The casing includes a pump chamber having a washer fluid suction port and a discharge port and inside which the impeller is accommodated, a motor housing chamber disposed above the pump chamber and inside which the motor is accommodated, a board housing chamber inside which the control circuit board is accommodated, and a connector portion extending outwardly in a cylindrical shape and inside which the plurality of terminal pieces extends. The connector portion is provided such that one of the terminal pieces is directly coupled to the motor.

Abstract: A compressor having an internally mounted inverter and having improved safety at low cost is provided. The compressor has a motor; a compressor mechanism driven by the motor; a first housing section having an opening and within which the motor is housed; a second housing section which is mounted on the first housing section and which closes the opening; a fixing member which fixes the second housing section to the first housing section; a controller which is provided on the first housing section and which controls the operation of the motor; a power supply section which supplies power to the controller; a protective cover which covers the controller; and a power source control apparatus which stops the supply of power to the controller by the power supply section or carries out a prescribed safety measure operation when the protective cover is removed from the controller.

Abstract: A motor/pump assembly, in particular for a motor vehicle braking apparatus is fixed axially on an end face of the pump housing. The brush plate forms the termination face of the motor with respect to the pump housing. The boundary area of the motor housing which faces the pump housing and that area of the brush plate which is radially adjacent to the boundary area of the motor housing each have a seal-accommodating step, into which a seal is inserted which is compressed axially by the pump housing being fixed to the motor.

Abstract: In a magnetically levitated pump, an impeller-side ferromagnetic body (second ferromagnetic body) provided on a circumferential surface of an impeller facing a casing unit on the side of a position sensor and a casing-side ferromagnetic body (third ferromagnetic body) opposite to the impeller-side ferromagnetic body (second ferromagnetic body) to attract the impeller toward the casing unit on the side of the position sensor are adapted to have opposite portions of mutually different shapes, so that the maximum required attractive force of an electro-magnet for magnetic bearing is suppressed and length of the electro-magnet for magnetic bearing is made shorter.

Abstract: A blower includes a stationary portion including an inlet and an outlet, a rotating portion provided to the stationary portion, and a motor adapted to drive the rotating portion. The inlet and outlet are co-axially aligned. The stationary portion includes a housing, a stator component provided to the housing, and a tube providing an interior surface. The rotating portion includes one or more bearings that are provided along the interior surface of the tube to support a rotor within the tube. In an embodiment, the blower is structured to supply air at positive pressure.

Abstract: If the ambient temperature of a pressure volute measured by a temperature sensor exceeds 0° C., a compressor is instantly started at normal operation. If the temperature of the pressure volute measured by the temperature sensor is 0° C. or lower, there is a possibility that a rotary vane may be adhered to the pressure volute due to a congelation. Therefore, vibration along the axial direction is given to the rotary shaft by way of an axial magnetic bearing. If the vibration amplitude of the thus given vibration exceeds a predetermined value, the compressor is started at normal operation after idle operation. On the other hand, if the vibration amplitude is lower than a predetermined value, it is determined that the thus given vibration is unable to eliminate the adhesion of the rotary vane due to the congelation, and the heater is actuated to heat the pressure volute only for a predetermined time. Thereafter, the ambient temperature is detected again, and if the ambient temperature exceeds 0° C.

Abstract: Embodiments of the present disclosure include a fan housing having a first part with a first side wall and a first back wall, a second part having a second side wall and a second back wall, where the first back wall and the second back wall meet to define an axle opening and the first and second side walls meet to define a right circular cylinder parallel with the axle opening. The first part and second part of the housing can be mirror images when positioned with the first and second sidewalls and the edge of the first and second back walls facing each other. Embodiments of the fan housing can also include a motor casing that extends from the first and second back walls away from the first and second side walls. The motor casing can contain and house a motor for turning the impeller contained in the housing.

Abstract: A device for use in a molten metal pump helps alleviate jams between a rotating rotor and stationary inlet. The device includes an inlet structure including one or more openings and a displacement structure that preferably includes one or more rotor blades. The inlet structure and displacement structure are connected to one another (preferably, but not necessarily, as a unitary piece), thus enabling them both to rotate. A pump including the device is also enclosed. The invention further includes a bearing surface for an impeller or for a device according to the invention, wherein the bearing surface includes grooves that help reduce molten metal build up between the bearing surface of the impeller or device and the bearing surface of a pump chamber.

Abstract: A fuel pump is constructed of a pump casing, a rotating member and a reinforcing member. The pump casing internally forms a pump chamber, in which the rotating member is received, such that the rotating member rotates to pressurize fuel in the pump chamber. The reinforcing member reinforces the pump casing against fluidic force applied to the pump casing. The pump casing is formed of resin. The reinforcing member is insert-formed in the pump casing, so that the reinforcing member is at least partially embedded in the pump casing.

Abstract: A fluid transfer systems described herein. The fluid transfer system generally includes a centrifugal multistage pump, a holding tank for holding the fluid operably connected to the pump body via a first conduit, an inlet for receiving the fluid, wherein the fluid is pressurized to form the pressurized fluid, a manifold for passing the pressurized fluid to a second location and an outlet for receiving fluid operably connected to the manifold.

Abstract: A cooling fan comprising a housing that connects to a chassis that is operable to support an electronic component. An axial duct runs through the housing. A blade assembly is rotatably disposed within the duct and comprises a plurality of fan blades that extend radially from a hub to a fan diameter. The axial duct has a chord length at least equal to the fan diameter. A motor assembly is disposed within the axial duct and coupled to said blade assembly. The cooling fan provides a cooling capacity of at least 1.5 air horsepower per cubic inch volume of the cooling fan.

Abstract: A heat dissipation fan includes a fan frame, a stator mounted to the frame, and a rotor rotatably disposed around the stator. The fan frame includes a bracket, a central tube for positioning the stator, and a supporting member. The supporting member is made of a material having a higher bending strength than a plastic material used to form the bracket and the central tube. The supporting member includes a main body connected to the central tube, a plurality of ribs extending radially outwardly from the main body, and a plurality of engaging units formed at free ends of the ribs, respectively. The engaging units are embedded in the bracket for integrally connecting the central tube to the bracket.

Abstract: A pump-motor assembly includes a housing and a lead protector sleeve to protect leads disposed along an exterior surface of the housing. The housing and the lead protector sleeve include first and second cooperating snap-fit connection elements, respectively, to secure the lead protector sleeve in position along the exterior surface of the housing via a snap-fit connection. The lead protector sleeve may include a first portion spaced from the exterior surface to form a conduit along the exterior surface to accommodate the leads, and a second portion extending from the first portion to engage the pump-motor housing. The second portion may include a projection or depression to secure the lead protector in position along the exterior surface of the pump-motor assembly via snap-fit interaction with the housing. In one embodiment, the second portion may include a resiliently deformable tab.

Abstract: A turbo-molecular pump that enables reliable suppression of attachment of depositions onto component parts thereof. The turbo-molecular pump discharges a deposition-causing gas from a processing chamber. A rotor has a rotor shaft aligned with an exhaust stream. A cylindrical casing houses the rotor therein. A plurality of blade-form rotor blades projects from the rotor orthogonally with respect to the rotor shaft and are divided into a plurality of rotor blade groups. A plurality of blade-form stator blades projects orthogonally with respect to the rotor shaft from a rotor-facing surface and are divided into a plurality of stator blade groups. Gas supply ports are located on an upstream side of the rotor blade group that is located furthest downstream in the exhaust stream, and supply a deposition-suppressing gas which includes gas molecules having a large molecular weight.

Abstract: The present invention is directed towards an air circulation device. The air circulation device is capable of producing and directing an air current to a desired location. The air current is used to circulate stagnant air which, in turn, provides a cooling effect. Advantageously, the device is electrically powered by 12-volt direct current (DC) but is capable of producing an air current of a magnitude similar to or greater than that produced by air circulation devices which are powered by 120-volt alternating current (AC). Further, the device contains at least one retractable elongated support which allows the device to stand upright on a flat surface when the support is in an extended position. When the device is not in use, the support may be retracted so as to be protected from being damaged during transport. Still further, the device is manufactured of a polymeric material and the motor and bearings of the device are sealed.

Abstract: A heat dissipation apparatus. A fan frame includes an air inlet, an air outlet, a passage, and a curved expansion portion. The air inlet is opposite the air outlet. The passage is between the air inlet and the air outlet, guiding airflow from the air inlet to the air outlet. The curved expansion portion is radially and outwardly extended from an inner peripheral wall of the passage at the air inlet or air outlet. An impeller is disposed in the fan frame and includes a plurality of blades. Each blade is disposed in the passage and includes an extension end extending to the curved expansion portion.

Abstract: The invention relates to a housing part, in particular a pump housing part, having a metering unit fastened in a pressure-tight manner to the housing part so as to be detachable, that is to say separable repeatedly without destruction. In order to optimize the fastening of the functional part, a collar is provided on the housing part, the collar having a tapered collar face against which a first tapered face of at least one tapered element bears, the tapered element having a second tapered face with which a tapered ring face of a tapered ring comes into contact when the tapered ring is moved from an open position into a closed position in order to press a positively locking face of the tapered element against a mating face which is provided on the functional unit.

Abstract: An electric blower includes a motor having a stator on which field windings are wound, a rotor facing the stator, and a bracket covering the stator and the rotor. The electric blower further includes a fan mounted to a shaft coupled to the rotor, and an air guide having a diffuser provided to the outer circumference of the fan and formed of a plurality of stationary blades adjacent to each other. The electric blower still includes a fan case having openings at its outer circumference for discharging a part of the air having passed the diffuser to the outside, and protrusions having a brim for covering a part of the openings. The foregoing structure allows the air blower to cool the motor with airflow generated by the fan.