Abstract: A fluid device having a fluid machine and a rotary electric machine includes a fluid machine and a rotary electric machine connected to a rotating shaft of the fluid machine. A cooler is arranged for carrying out liquid-cooling using a fluid of a cooling pipe connecting an upstream portion and a downstream portion of the fluid machine to bypass the fluid machine. The fluid machine and the rotary electric machine are detachably coupled to each other. Hence, the rotary electric machine can enhance the cooling performance for the rotary electric machine and reduce its size, achieving improvements in maintainability and serviceability.

Abstract: Systems and methods of the invention relate to diagnosing a compressor. A method may include monitoring a pressure of compressed air within a reservoir, actuating a piston within a cylinder of the compressor, and detecting a leak condition of an exhaust valve of the cylinder through recognition of a change in the monitored pressure of the compressed air within the reservoir during a time period in which the piston is actuated. A system is also disclosed including an engine, a compressor operatively connected to the engine, and a controller that is operable to determine a condition of the compressor.

Abstract: The systems, devices, and methods described herein describe a valve cover assembly that enables the easy removal and insertion of a screw gland into a threaded ring. The valve cover assembly includes an outside housing that provides an offset between a fluid end module and a top end of the valve cover assembly. A spring is positioned between the top end and the threaded ring and biased to provide a downward force on the threaded ring. The screw gland applies a reaction force against a valve plug. A piston is positioned at a base of the threaded ring in contact with the fluid end module. When actuated, the piston overcomes the downward force and lifts the threaded ring from the fluid end module. This reduces the force on the plug and allows a user to remove the screw gland by hand (and install as well) and without additional machinery required.

Abstract: A communication pipe outlet (263) of a suction muffler (26) included in a hermetic compressor (10) includes a communication opening (264). An upper shape (264a) of the communication opening (264) is a curved protruding shape, and a lower shape (264b) of the communication opening (264) is a rectangular shape. A suction hole (33) of a valve plate (30) included in the hermetic compressor (10) is formed such that the cylinder side of the suction hole (33) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole (33) has a shape similar to that of the communication opening (264). The valve plate (30) and a communication pipe (262) are connected in a state where an upper peripheral surface of the communication opening (264) of the communication pipe outlet (263) corresponds to an upper peripheral surface of the suction hole (33).

Abstract: A method and system for measuring rotor position or velocity in an electric motor disposed in hydraulic fluid. The system comprises a contactless position sensor that measures electric motor rotor via magnetic, optical, or other means through a diaphragm that is permeable to the sensing means but impervious to the hydraulic fluid. An electronic sensor is positioned outside the operating fluid, whereas the motor is located in the fluid volume.

Abstract: An electric compressor includes: an electric motor; a compression mechanism driven by the electric motor; a housing accommodating the electric motor and the compression mechanism; an accommodation part provided on a sidewall of the housing and accommodating a drive circuit for driving the electric motor; a lid contacting the accommodation part and fastened to the accommodation part by a fastening portion; a sealing member sandwiched between the accommodation part and the lid so as to seal between them. The accommodation part has a wall standing from the sidewall of the housing, and a step is provided on a standing end surface of the wall orthogonal to a standing direction of the wall, at a midway position from an inside toward an outside of the accommodation part.

Abstract: A linear motor includes a housing, a mover and a stator unit. The mover is movable relative to the housing, and includes a rod member, a plurality of first magnetic poles mounted to the rod member, and a plurality of second magnetic poles mounted to the rod member. The first and second magnetic poles are arranged alternately in a circumferential direction of the rod member, and are partially overlapped circumferentially. The stator unit is disposed in the housing, surrounds the mover, and is able to be energized to drive reciprocal movement of the mover relative to the housing.

Abstract: A radiator fan of a motor vehicle, in particular a main fan, contains a fan wheel which has a hub and an electric-motor rotor which is attached thereto in a form-locking manner. At least one connecting dome is formed integrally on the rotor, which connecting dome protrudes through a corresponding cutout of the hub and is deformed on the free end side in a rivet-shaped manner in order to produce the form-locking connection.

Abstract: A suction jet pump has a fuel line, a propulsion jet nozzle, an intake region, a mixing tube, and a diffuser. The propulsion jet nozzle and the mixing tube are oriented rectilinearly with respect to one another. As viewed in the direction of flow, the diffuser has a course which differs from the course of the mixing tube.

Abstract: A device for conserving power is provided in a piston compressor, in particular a piston-compressor for generating compressed air in a motor vehicle and having a piston delimiting a compression chamber for generating compressed air, which, originating from the ambient environment, arrives in the compression chamber for compression by way of at least one suction connection formed on a cylinder head cover and an intake valve array arranged on a valve plate. For the purpose of conserving power, a pressure-dependently acting idling device is provided for the intake valve array having a dedicated suction lamella, which can be rotated by an actuator between a working position overlapping at least one suction opening and an idling position unblocking, at least in part, the at least one suction opening.

Abstract: Systems and methods of controlling the speed of a pump configured to move liquid through a pump system are described. The actual motor speed of the pump motor is controlled by adjusting a current applied to the motor based on the difference between the actual motor speed and the target motor speed according to a gain setting. A first gain value is applied as the gain setting when the difference between the actual motor speed and the target motor speed does not exceed a first threshold. However, a second, higher gain value is applied when the difference between the actual motor speed and the target motor speed exceeds the first threshold.

Abstract: A system and method for flooded start control of a compressor are provided. An ambient temperature sensor generates ambient temperature data and a compressor temperature sensor generates compressor temperature data.

Abstract: A fluid pump kit is provided. The kit includes a magnetic driven member for coupling with and rotating a propeller, and a magnetic driver for magnetically coupling to and driving the magnetic driven member by a magnetic attraction force establishable between the magnetic driver and the magnetic driven member. A motor of the kit operates the magnetic driver. First and second casings are provided for housing the magnetic driver and the magnetic driven member, respectively. The first and second casings with housed magnetic driver and magnetic driven member, respectively, are detachably securable to opposite sides of a non-magnetic spacer solely by the magnetic attraction force establishable between the magnetic driver and the magnetic driven member sufficient to support the second casing and the housed magnetic driven member in a particular position without the use of mechanical aids.

Abstract: A roller assembly comprises a central section with a hub; a plurality of arms coupled to the central section such that each arm is capable of moving independently with respect to the central section; a plurality of spring pins, one spring pin associated with each arm; a plurality of retaining pins, one retaining pin associated with each arm; and a plurality of rollers, one roller coupled to each arm.

Abstract: A stepper motor suitable for use in a medical imaging environment has (a) a cylindrical central gear having an external surface with circumferentially distributed and radially directed teeth, (b) a shaft for mounting the central gear such that it is constrained to move in rotational motion about its centerline, (c) a cylindrical hoop gear having a bore with an internal surface having circumferentially distributed and radially directed teeth, (d) level arm crank mechanisms for mounting the hoop gear such that it is constrained to move in translational-circular motion about the central gear's centerline, wherein this central gear is further configured to fit within the hoop gear's bore in such a manner that a plurality of the central gear and hoop gear teeth intermesh and cooperate so that the planetary movement of the hoop gear causes the central gear to rotate, and (e) piston mechanisms for applying a fluid pressure driven force to specified points on the hoop gear so as to cause its movement.

Abstract: A blower for use to provide combustion air to a fire (e.g., to assist in the lighting of a fire). The blower may include a cylindrical housing having an inlet opening and an outlet opening with a bore extending between the inlet and the outlet. A fan and power source may be provided to induce air flow from the inlet opening and through the bore such that air is expelled from the outlet opening. The outlet air exiting the outlet opening may travel in a direction substantially parallel with a central axis of the cylindrical housing. The blower may be supported by an infinitely adjustable flexible member that may be manipulated to position the blower with respect to the fire to provide outlet air to the fire. The flexible member may be engaged with a clip to attach the blower to a structure adjacent to the fire.

Abstract: The invention relates to an impeller (1) of a centrifugal pump apparatus, in particular of a blood pump apparatus, comprising a discoidal body (1) rotatable around an axis (2) of rotation, the body (1) comprising an upper surface (3), a lower surface (4), a central channel (5) extending in the direction of the axis (2) of rotation between the upper and lower surface (3, 4) for guiding fluid, in particular blood through the body (1) in axial direction when the body (1) is rotated in a pump chamber of a pump and several blades (6) supported by the upper surface (3) for pumping fluid, in particular blood, when the body (1) is rotated in a pump chamber of a pump, several spiral grooves (7) in the lower surface (4), each groove (7) having a bottom (7a) and two sidewalls (7b, 7c) and being open in an axial direction, merging into a circumferential surface (8) of the body (1) and extending from this circumferential surface (8) to the central channel (5) at least for providing a pumping action of fluid, in particular

Abstract: A roundel structure for a five-compressing-chamber diaphragm pump includes a cylindrical or inverted frustoconical eccentric roundel in an eccentric roundel mount. The cylindrical or inverted frustoconical eccentric roundel includes an annular positioning groove or indentation, a vertical or inverted frustoconical flank and a sloped top ring extending from the annular positioning groove or indentation to the flank. The sloped top ring eliminates the oblique high frequency pull and squeezing phenomena that occurs in a conventional tubular eccentric roundel arrangement.

Abstract: A linear compressor is provided that may include a shell in which a discharge port may be provided, a cylinder disposed in the shell to define a compression space for a refrigerant, a piston disposed to be reciprocated in an axial direction within the cylinder, a discharge valve disposed on or at one side of the cylinder to selectively discharge the refrigerant compressed in the compression space, a valve spring coupled to the discharge valve to provide a restoring force, and a stopper coupled to the valve spring to restrict deformation of the valve spring. The stopper may include a guide recessed in a direction in which the valve spring is deformed to reduce an impulse between the stopper and the valve spring.

Abstract: An air compressor having a pen-type pressure gauge is disclosed and provided for measuring the pressure of the compressed air produced by air compressor as well as releasing air into an ambient environment when the pressure is greater than a predetermined maximum safety value, so as to achieve the operational safety without installing a separate safety valve and prevent an inflated object from damages.