Abstract: A flow thru mechanical bearing system can be used in an implantable rotary blood pump that includes a pump housing. An impeller housed in the pump housing can be radially supported by a row of at least three low friction contact points located on an inside bore of the impeller. The impeller may be axially supported by a second mechanical bearing. The second mechanical bearing may provide at least three axial contact points on the top surfaces of the impeller. The impeller is driven by a magnetic coupling which functions mainly to transmit torque to the impeller. Further, in some cases, the magnetic coupling may restrain axial motion of the impeller.

Abstract: A modular ejector pump (1) for a fuel delivery device (39). The ejector pump (1) has a feed line (3) and a first nozzle (7). The feed line (3) is embodied to supply fuel (27) to the first nozzle (7). The ejector pump (1) furthermore has a second nozzle (9), which is arranged parallel to the first nozzle (7). The feed line (3) is embodied to supply fuel (27) to the second nozzle (9).

Abstract: A method and apparatus for controlling a solenoid actuated inlet valve to a pump chamber of a piston pump. A control circuit energizes the solenoid to open the inlet valve in synchronism with the reciprocation of the piston and thereafter de-energize the solenoid to initiate closure of the inlet valve. The inlet valve is decelerated following de-energization of the solenoid thus effectively reducing engine noise attributable to the inlet valve.

Abstract: A foam pump including a housing and a piston that reciprocates within the housing is disclosed herein. The piston has a hollow portion and an orifice through the wall of the piston. A first seal located proximate the upper end of the piston provides a seal between the piston and the housing. A liquid inlet is located in the side wall of the housing at a point lower than the top of the piston. A one-way liquid inlet valve is located proximate the liquid inlet and a one-way liquid outlet valve is located prior to the liquid outlet. A charge chamber is defined at least in part by the liquid inlet valve, the liquid outlet valve, a wall of the piston and a wall of the housing.

Abstract: A gas turbine engine includes an annular plenum defined with an outer skin and a perforated inner skin for receiving selective air flow to impinge a support case which supports shrouds of the rotor assemblies of the engine therein for active tip clearance control of the rotor assemblies. In one embodiment a bobbin-type transfer tube for supplying cooling air into the plenum, is provided between an outer case of the engine an the plenum such that the thermally induced relative movement of the outer case and the plenum is permitted.

Abstract: A centrifugal fan may include an impeller arranged to rotate about a rotation axis, an impeller case arranged to accommodate the impeller, a motor arranged to rotate the impeller, and a motor case arranged to accommodate the motor. The impeller may include a boss portion joined to a shaft arranged to rotate about the rotation axis, a hub arranged to extend radially outward from the boss portion, and a plurality of blades. Each blade may be arranged to extend radially outward. An inner wall of the impeller case may include an inside surface extending radially outward along an upper end portion of each blade. A side end portion of an air inlet defined in a central portion of the impeller case may include a curved surface projecting radially inward.

Abstract: A compression device includes a first compressor and a second compressor mounted in parallel, each compressor including a leakproof enclosure including a low pressure portion containing a motor and an oil sump, an oil level equalization conduit putting into communication the oil sumps of the first and second compressors, and control means adapted for controlling the starting and the stopping of the first and second compressors. The first compressor includes first detection means coupled with the control means and adapted for detecting an oil level in the oil sump of the first compressor. The control means are adapted for controlling the stopping of the second compressor when the oil level detected by the first detection means falls below a first predetermined value.

Abstract: In an electrically driven dual pump, a cylindrical outer rotor is rotatably disposed with respect to the inner circumferential surface side of the housing and has a plurality of permanent magnets on an outer circumferential surface of the outer rotor to constitute a motor section in cooperation with coils of a housing, a partitioning plate is disposed to partition an inner circumferential side of the outer rotor into a first pump chamber and a second pump chamber, and each of first and second inner rotors is rotatably disposed within the first and second pump chambers with a rotation center of each of the first and second inner rotors eccentric to the center of the outer rotor and constitutes a space against the outer rotor which is communicated with a corresponding one of the suction ports and the corresponding one of the discharge ports.

Abstract: It is an object of the invention to provide a motor-driven compressor being fixable reliably to a vehicle or the like and being capable of reliably protecting elements accommodated in a housing even upon reception of an external force due to a collision by any possibility. A motor-driven compressor of the invention comprises a compression mechanism for compressing fluid, an electric motor for driving the compression mechanism, a motor drive circuit for driving the electric motor, and a housing. The housing accommodates the compression mechanism, the electric motor, and the motor drive circuit. A cover for protecting the housing from an external force caused by a collision is fixed to the outside of the housing. The cover is arranged via a clearance with respect to the housing, and absorbs the external force applied to the cover by the clearance.

Abstract: The present invention relates to a vacuum system for evacuating a chamber of a metallurgical processing system. The system comprises a vacuum pumping arrangement for evacuating gas from the chamber, a foreline connecting the vacuum pumping arrangement to the chamber, a filter volume located in the foreline for filtering gas evacuated from the chamber along the foreline, and a by-pass line connecting the vacuum pumping arrangement to the chamber and arranged to by-pass the filter volume selectively dependent on monitored characteristics of the degassing chamber or the vacuum system.

Abstract: A fan structure includes an upper cover, a fan frame body, a bearing cup, a bearing, a stator assembly, a hub and a shaft rod. The upper cover is mated with the fan frame body to together define a receiving space in which the bearing cup is disposed. The bearing cup has an open end and a closed end. The bearing is disposed in the bearing cup. The stator assembly is fitted around the bearing cup. The hub has multiple outward extending blades spaced from the upper cover by a first distance. The shaft rod has a connection end connected with the hub and a protruding end passing through the shaft hole and protruding from the bearing to abut against the closed end of the bearing cup and define a second distance. The first distance is smaller than the second distance to avoid deflection of the shaft rod.

Abstract: Fluid level sensor systems and methods can include an inverted cup with a sealed top and an open bottom, the inverted cup defining an inner air space. An inner pressure tube can extend from the inner air space and through the sealed top. A contact sensor can be positioned near the sealed top, the contact sensor including a pair of contacts. A pair of conductors can extend from the contact sensor, one conductor extending from each one of the pair of contacts.

Abstract: A multi-stage reciprocating compressor includes a cylinder block and a cylinder head. The cylinder block defines a low stage cylinder and a high stage cylinder. The cylinder head is secured to the cylinder block overlying the low and high stage cylinders. The cylinder head defines a mid-stage plenum which is in fluid communication with the low stage cylinder and the high stage cylinder for communicating a working fluid discharged from the low stage cylinder to the high stage cylinder.

Abstract: A control method of a fan rotation speed, which controls the operation of a fan set including fans connected in series, is disclosed. The control method includes the steps of acquiring a control factor; judging whether the control factor is less than a first threshold value; executing a first control procedure when the control factor is less than the first threshold value; judging whether the control factor is greater than a second threshold value when the control factor is greater than the first threshold; executing a second control procedure when the control factor is greater than the second threshold value; and executing a third control procedure when the control factor is less than the second threshold value.

Abstract: Systems, methods, and apparatuses for providing a safety arrangement for an integrated heater, circulation pump, and motor for an appliance are provided. In an example safety arrangement, the circulation pump assembly includes a heater, a pump, and a motor integrated into a single unit. The circulation pump assembly defines a first end, a second opposite end, and a housing extending therebetween. The safety arrangement includes a hub configured to at least partially surround the first end of the circulation pump assembly and a first shield configured to at least partially surround the housing of the circulation pump assembly. The safety arrangement further includes a second shield configured to at least partially surround the housing of the circulation pump assembly. The hub, the first shield, and the second shield are configured to cooperate with one another to protect the circulation pump assembly from one or more hazardous conditions.

Abstract: A tube pump comprises a rotor configured to have a roller and to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap. The rotor includes a disk part which holds the roller on a base side, and a tube press member that engages with the disk part so that the tube does not move to the base side with respect to the disk part, seals a gap formed with respect to the inner circumferential surface of the cap, and is capable of rotating along an outer circumferential part of the disk part is provided at the outer circumferential part of the disk part.

Abstract: A pump device is provided including: a unitary pump frame; an electromagnet arrangement that includes a winding wrapped around a portion of the unitary pump frame; a diaphragm assembly coupled to the unitary pump frame, which includes a movable diaphragm and a manifold; and a pump arm having a proximal end coupled to the unitary pump frame and a distal end supporting a permanent magnet to interact with the electromagnet arrangement to cause the pump arm to swing back and forth during operation to displace the diaphragm and discharge an air stream from the pump device. Related methods of manufacture are also provided.

Abstract: An electrical submersible pump (ESP) having a sleeve coupled to the shaft that rotates as the shaft rotates. The sleeve can be a base portion of a pump impeller, a journal bearing, or a bushing. A drive collar mounts around the shaft and has an end with a portion that projects past an end of the sleeve profiled to correspond with the shape of the projecting portion. As the shaft rotates the drive collar the projecting portion of the drive collar pushes against the profiled end of the sleeve to rotate the sleeve. The projecting portion can be a wedge shaped tab on the drive collar, or an angular segment of the drive collar extending axially past the remaining segments. The profiled end of the sleeve can include a recess formed to receive the tab and can have an angular segment corresponding to that on the drive collar.

Abstract: A battery-powered portable personal fan is described with reference to two embodiments, both of which comprise a two-part base, of which the upper part is provided with an elongate neck to which a ball-shaped motor housing is pivotally attached. The motor housing contains a motor having a drive shaft which drives a two-blade at least 5000 RPM on a high-speed setting. In one embodiment, a rechargeable lithium ion battery is permanently mounted in the upper base portion and the lower base portion, available in multiple configurations is hollow so as to be useful as a storage area. It is preferably arranged so as to fit in one of several available golf cart cup holders. In the alternative embodiment, the lower housing is canister-shaped to receive a replaceable battery cartridge and, where desired, a tripod arrangement of legs for additional stability. Ornamental elastomeric covers can be stretched over the ball-shaped motor housing to visually link the fan to a particular sport.

Abstract: A dove-tail clamp assembly configured to couple a plunger and a pony rod for operation within a fluid end. The clamp assembly using a flange portion extending from the plunger and the pony rod. A clamp within the clamp assembly engages the flanges in the plunger and the pony rod in a non-threaded relationship to permit the pony rod to induce a reciprocating movement of the plunger within the fluid end. The flange portions may be integrally coupled to the plunger and the pony rod in one embodiment. In another embodiment, the flange portions may be threadedly inserted into existing bores in the plunger and the pony rod. The clamp assembly may include a deflector and an alignment pin.