Abstract: A blood treatment system includes (i) a blood pump including a first blood pump chamber operable with a first inlet valve and a first outlet valve, and a second blood pump chamber operable with a second inlet valve and a second outlet valve; (ii) an arterial blood line; (iii) a dialyzer placed in fluid communication with the arterial blood line, wherein the blood pump is provided along the arterial blood line upstream of the dialyzer; and (iv) a venous blood line extending downstream from the dialyzer. The system also includes a processor configured to sequence the first and second blood pump chambers so as to achieve a pulsatile pattern of filling the first and second blood pump chambers and an at least substantially constant pattern of discharging blood from the first and second blood pump chambers to the dialyzer.

Abstract: Most multistage compressors specify a maximum inlet pressure that may be supplied to the compressor to stay within designed limits. If the supply gas to be compressed is at a higher pressure than the specified maximum inlet pressure, then its pressure must be reduced before connecting it to the compressor. This pressure reduction is inefficient. The present invention avoids reducing the inlet pressure by routing the supply gas directly to the appropriate compression stage depending on its inlet pressure such that the compressor loads are still within the specified limits of the equipment.

Abstract: A cylinder head cover for a coolant compressor, wherein the cylinder head cover is attachable to a cylinder head arrangement in order to form a hollow space for receiving a coolant compressed by the piston, wherein the cylinder head arrangement comprises a valve plate attached to the cylinder housing and having an outlet opening and an outlet valve, which closes the outlet opening in cycles and consists of a valve spring and a stop plate for delimiting an opening movement of the valve spring. In order to achieve a cost-efficient production and installation of the cylinder head cover while assuring a secure support of the stop plate, it is provided that the cylinder head cover can comprise at least two contact surfaces for supporting stop plates of different outlet valves in order to adjust different opening positions of the valve springs of the different outlet valves.

Abstract: There is disclosed a hollow tube body used for a liquid feeding member and deformable by pressurization, wherein: an axial cross-section of the tube body has two opposing long side parts and two opposing short side parts; four corner portions formed by the long side parts and the short side parts each have a shape curved to protrude outward; each of the long side parts has a recessed part recessed inward and continuing from the corner portions; and a portion other than the corner portions of each of the short side parts is in a flat shape.

Abstract: At least one rib 9c, 21c extending in a direction of connecting with a valve cartridge 30 is provided to the inner sides of each of a second connection port 9 of a pump head 5 and a third connection port 21 of a first connecting adapter 20A, and at least one slit 41 which extends in the connecting direction and into which the ribs 9c, 21c are loosely inserted is provided to the lower outer periphery of the valve cartridge 30.

Abstract: A pump assembly mounts on a universal adapter having a back end attached to a motor, a receiving area, an outer magnet assembly rotatable around the receiving area by a motor, and a forward mounting plate surrounding the forward receiving area and having mounting features for attachment to the back cover of each of a variety of pump assemblies. The pump assembly includes a casing having an inlet and an outlet. A back cover attached to the casing has mounting features for attachment to the mounting features of the universal adapter. A containment shell includes a cup for positioning in the receiving area. An inner magnet assembly is positioned in the cup is rotatable by magnetic coupling to the outer magnet assembly through the cup. An impeller is rotatable within the casing by the inner magnet assembly to pump fluid from the inlet to the outlet.

Abstract: A pump comprises: a vertically-extending conduit having an intermediate portion extending between lower and upper portions, the intermediate portion having a cross-sectional area smaller than that of the upper portions, a lift arrangement including an array of ports arranged over a length of the lower portion, each port of the array having a terminus at the lower portion and extending horizontally away from the terminus such that the working fluid is directed towards a center of the conduit; and an injector having a terminus at the top of the intermediate portion and extending vertically downwardly such that the working fluid is directed vertically upwardly, the terminus of the injector being defined by a cylindrical groove, an annular chamber surrounding the injector, having a length and communicating with the injector through a row of apertures spaced a distance from the junction of the transition portion and the intermediate portion.

Abstract: A fan arrangement includes a fan and toothed ring, and a converter motor includes a fan arrangement. The fan includes a base body on which fan blades are premolded, and the fan includes an annular region, which is premolded on the side of the fan blades facing away from the base body. The toothed ring is situated within the annular region, and thus, in particular, is set apart from the base body, and thus, in particular, is set apart from the base body via the fan blades.

Abstract: A fluid routing plug for use with a fluid end section. The fluid end section being one of a plurality of fluid end sections making up a fluid end side of a high pressure pump. The fluid routing plug is installed within a horizontal bore formed in a fluid end section and is configured to route fluid between an intake and discharge bore. The fluid routing plug comprises a plurality of first and second fluid passages. The first and second passages do not intersect and are offset from one another. The first fluid passages are configured to direct fluid delivered to the horizontal bore from intake bores towards a reciprocating plunger. The second fluid passages are configured to direct fluid pressurized by the plunger towards a discharge bore.

Abstract: A diffuser subassembly for use in downhole submersible pump assemblies includes a bearing set for supporting a drive shaft of the pump assemblies. The bearing set includes a sleeve for supporting the drive shaft in upward, downward and radial directions. The sleeve includes a central flange captured axially between a pair of bushings fixed to a diffuser body. Axial loads from the drive shaft may be transferred through the central flange of the sleeve to one or the other of the bushings into the diffuser body to accommodate upward and downward thrust forces. The bushings may be keyed to discourage rotational motion with respect to the diffuser body.

Abstract: A turbo molecular pump including multiple stages. At least one of the multiple stages of the rotor blades and the multiple stages of the stator blades is configured to satisfy any one of a first condition of Xout<Xc and Xin<Xc, a second condition of ?·Xc?Xin>Xc>Xout where ?=1.04, or a third condition of Xin<Xc<Xout??·Xc where ?=1.04. Xout, Xc and Xin being an inter-blade distance dived by a blade length, at an outer-diameter-side end portion, at an inner-diameter-side portion, and at an intermediate position of each blade, respectively.

Abstract: A fan main body member of a turbofan has multiple blades disposed around a fan axial center, a shroud ring which is coupled to each of the multiple blades, and a fan hub portion which is coupled to each of the multiple blades on a side opposite from the shroud ring. An other end side plate of the turbofan is fitted to the radially outer side of the fan hub portion and joined to an other side blade end portions of each of the multiple blades. In addition, an outer diameter of the fan hub portion is smaller than an inner diameter of the shroud ring. In addition, the multiple blades, the shroud ring, and the fan hub portion are integrally formed.

Abstract: A pump fluid end having a reciprocating element a discharge valve assembly, a suction valve assembly, and a suction valve stops. The reciprocating element is disposed at least partially within a reciprocating element bore of the pump fluid end. The suction valve assembly is coupled with a front end of the reciprocating element. The suction valve stop is positioned within the reciprocating element bore such that the suction valve stop contacts and applies a closing force to the suction valve assembly when the suction valve assembly is stuck open at the end of a discharge stroke of the reciprocating element.

Abstract: A compressor operates within a system having a cooling capacity below 60 tons. The compressor includes a hermetically sealed housing and a drive module and aero module within the housing. The drive module includes a motor, a rotor, and oil free bearings. The aero module has a centrifugal impeller driven by the drive module to compress a working fluid. The compressor is arranged such that the working fluid flows through the drive module before reaching the aero module.

Abstract: A closed-loop hydraulic circuit includes a piston chamber housing a piston rod and a ram piston coupled to an end of the piston rod, and a pump in fluid communication with the piston chamber at first and second hydraulic ports. Pumping a hydraulic fluid to the first hydraulic port causes a forward stroke of the ram piston and the piston rod, and pumping the hydraulic fluid to the second hydraulic port causes a return stroke of the ram piston and the piston rod within the piston chamber. An accumulator is in fluid communication with the pump and the piston chamber, and a 3-2 valve is actuatable between a first position, where pressurized hydraulic fluid is conveyed from the accumulator to the pump during the forward stroke, and a second position, where excess hydraulic fluid is conveyed from the first hydraulic port to the accumulator during the return stroke.

Abstract: An electric air pump system includes a housing in fluid communication with an inflatable body, a first valve, a first air pump for inflating and deflating the inflatable body, a second air pump for inflating the inflatable body, an air pressure sensor configured to detect the inner pressure of the inflatable body, and first and second prompting devices. The system also includes a control device electrically coupled to the first and second air pumps, the air pressure sensor, and the first and second prompting devices. The first prompting device outputs a first indication signal when the inner pressure is less than or equal to a first air pressure threshold and the second prompting device outputs a second indication signal when the second air pump inflates the inflatable body.

Abstract: An electrical motor vehicle vacuum pump arrangement includes a housing assembly, a pump apparatus arranged therein, a drive motor, and a sound dampener. The housing assembly includes an inlet and an outlet opening arrangement. The pump apparatus includes a pump rotor housing with an inlet- and an outlet-side face wall, and a pump rotor housing part arranged therebetween. The inlet- and the outlet-side face wall and the pump rotor housing part enclose a pump rotor chamber with a pump rotor arranged therein. The drive motor is arranged in the housing assembly. The drive motor includes a motor rotor and a motor stator. The sound damper includes a first and a second sound damping chamber, and a sound dampener element. The first sound damping chamber is connected to the pump rotor chamber and to the second sound damping chamber. The second sound damping chamber is connected to the outlet opening arrangement.

Abstract: A submersible pump assembly has a seal section between the motor and the well fluid pump, the seal section having a housing, a shaft and a thrust bearing unit. The thrust bearing unit includes a thrust runner mounted to the shaft that rotates against a thrust bearing base fixed in the housing. An annular, metal thrust runner wave spring has an inner diameter surface in contact with the shaft and an outer diameter surface in contact with the runner bore. The wave spring has a transverse width between the inner diameter surface and the outer diameter surface that is elastically deflectable, exerting an inward bias force against the shaft and an outward bias force against the runner bore.

Abstract: A pump includes an axial inducer. The axial inducer includes a housing that has an internal surface that defines an axial fluid passage. A rotor is disposed about a central axis in the fluid passage. The rotor includes at least one blade that defines at least one blade tip. The internal surface of the housing defines a plurality of grooves adjacent the at least one blade tip. The grooves are elongated in a circumferential direction.

Abstract: A pump with a wear ring includes at least one impeller; at least one diffuser; and at least one wear ring positioned between the at least one impeller and the at least one diffuser. The wear ring is removably coupled to the diffuser and includes radially extending clutch members. The clutch members are configured to hold a portion of the at least one diffuser.