Abstract: A built-in electric air pump mounted on an inflatable bed by heat binding or adhesion is provided, and includes a pump housing; an air duct conversion mechanism mounted in the pump housing; a cover assembly covering the pump housing; a switch assembly connected with the air duct conversion mechanism; an air valve assembly disposed on the bottom of the pump housing; and a power source device connected with the switch assembly and powering the air pump. The air pump receives power from combinations of power sources in four different modes, namely, dry batteries, a rechargeable battery pack assembly, a vehicle-mounted power source and an AC adapter which match one another, to drive the pump, thereby forming multiple power source configurations to drive the same set of air pump and enable the same inflatable bed to be used indoors as well as outdoors at any time.

Abstract: A sensor assembly (51) for sensing one or more fluid properties of a fluid in a subsurface well (12) having a well fluid level (42W), a surface region (32) and a riser pipe (30) includes a sensor apparatus (52) and a pump assembly (54) that are positioned within the well (12). The sensor apparatus (52) includes a sensor (682) that senses one of the fluid properties. The pump assembly (54) can be positioned in an in-line manner relative to the sensor apparatus (52). The pump assembly (54) can be positioned between the sensor apparatus (52) and the surface region (32). Alternatively, the sensor apparatus (52) can be positioned between the pump assembly (54) and the surface region (32). In one embodiment, the sensor apparatus (52) is positioned above the well fluid level (42W). The pump assembly (54) can pump fluid toward the sensor apparatus (52) or the pump assembly (54) can pump fluid to draw more fluid to the sensor apparatus (52).

Abstract: A compressor is provided that includes a hermetically sealed container; a stator fixedly installed within the hermetically sealed container; a first rotary member that rotates, within the stator, around a first rotary shaft that extends concentrically with a center of the stator by a rotating electromagnetic field of the stator, and including first and second covers fixed to upper and lower parts thereof, respectively; a second rotary member that compresses a refrigerant in a compression space formed between the first and second rotary members while rotating, within the first rotary member, around a second rotary shaft; a vane that transmits the rotational force to the second rotary member from the first rotary member, and partitions the compression space into suction and compression regions; and first and second bearings fixed inside of the hermetically sealed container that rotatably support the first and second rotary members in an axial direction.

Abstract: An automatic inflation pump including a housing, an air inlet, an air outlet provided in the housing, a manual rotary switch, a sealing device located at the air outlet, an air pump provided inside the housing and a motor for driving the air pump. The manual rotary switch is provided thereon with a dovetail groove which includes a deep groove and two shallow grooves located at both sides of the deep groove. The sealing device includes a driving stem and an air sealing plate for sealing the air outlet. One end of the driving stem is connected with the air sealing plate. A spring is provided on the driving stem. One end of the spring is fixed on a free end of the driving stem and the other end of the spring is supported at the air outlet.

Abstract: A submersible electric pump includes a housing adapted to be submerged within a fluid to be pumped having apertures extending therethrough. An electric motor stator is positioned within the housing in communication with the apertures and is adapted to be in contact with the fluid. Inner and outer pump rotors are positioned within the housing in meshed engagement with one another to pump fluid when rotated. A plurality of permanent magnets are fixed for rotation with the outer rotor.

Abstract: A fan system includes: two circuit breakers, a control module for controlling two circuit breakers, two electric motors to which their operating voltage UB is supplied via the circuit breakers, and at least one temperature sensor on a board on which the circuit breakers are located. The control module evaluates a signal TNTC from the temperature sensor, and sets the pulse duty factors TV1, TV2 of pulsed control voltages at the circuit breakers, while taking into account this signal as well as a requested fan power, in such a way that no power loss PV exceeding a specified value occurs at any circuit breaker.

Abstract: A vacuum pump (10) suitable for mounting at a lower region of an engine such as in the oil sump of an engine. The vacuum pump (10) includes a casing (12) having a cavity (14) containing a movable member (18), wherein the cavity (14) is provided with an inlet (32) and an outlet (34) and the movable member (18) is movable to draw fluid into the cavity (14) through the inlet (32) and out of the cavity (14) through the outlet (34) so as to induce a reduction in pressure at the inlet. The vacuum pump (10) is further provided with an oil feed conduit (84) to supply oil to the cavity (14), the oil feed conduit (84) being provided with a valve (86) to prevent the flow of oil to the cavity (14) during periods when the pump is not operating.

Abstract: A fan control circuit of a computer includes a fan interface connected to a connector of a fan, a fan controller, a NOT gate, and an electronic switch. The fan controller outputs a PWM signal to the fan interface to control the operation of the fan, and includes a GPIO interface to output a voltage control signal to the NOT gate to switch the electronic switch on or off. A signal output of the electronic switch is connected to the fan interface. The voltage control signal is high level at the start up moment of the computer, and thus does not turn on the fan via the electronic switch. After a preset delay period, the voltage control signal is turned low by the fan controller so that the fan interface receives the PWM signal.

Abstract: A fuel pump, for an internal combustion engine, has a housing accommodating a pump and a motor. The motor is arranged to drive the pump so as to pump fuel through the housing. The motor has a wound stator having a plurality of inwardly directed teeth about which a stator winding is wound, and a radially outer surface in contact with an inner surface of the housing. One or more pathways are formed between the inner surface of the housing and the outer surface of the stator, for the flow of fuel there through. Each pathway is formed by an axially extending recess formed in the outer surface of the stator and aligned with a selected tooth of the stator.

Abstract: A high-performance oil pump for pumping oil in an internal combustion engine that eliminates or greatly reduces cavitation in the oil pump, thereby increasing the efficiency and performance of the oil pump. The present invention provides a housing having an inlet for receiving a supply of oil and an outlet for discharging the oil. At least two gears rotatably and matingly are disposed within the housing for pumping the oil from the inlet to the outlet. A pressure regulation circuit is disposed within the housing for balancing oil flow pressure between the inlet and the outlet by redirecting a portion of the oil from the outlet to the inlet when said oil flow pressure reaches a predetermined level at the outlet in order to reduce or eliminate cavitation of oil in the oil pump.

Abstract: A disposable pump head and canister assembly is provided having a disposable pump head having an upper housing with an input port and an output port, and being configured to be engaged to a motor so as to pump fluid into the input port, through the disposable pump head, and out the output port, the upper housing configured to couple to a support plate via a plurality of upper housing flexible tabs that snap fit to corresponding structure of the support plate and configured to be frictionally engaged to a motor so as to pump fluid into the input port, through the disposable pump head, and out the output port; and a canister having an exterior wall portion, a cover and a latching arrangement, where the exterior wall portion is configured so as to form an interior cavity dimensioned to receive the disposable pump head, and where the cover is configured to close and be latched to the exterior wall by the latching arrangement so as to frictionally engage the disposable pump head and the motor.

Abstract: In a water injection air compressor including a compressor main body for compressing air, a water-feed line for feeding water to an actuation chamber in the compressor main body, an air release valve for releasing the compressed air from the compressor main body, and a control panel for executing an on-load operation mode in which water is fed into the actuation chamber and an air release valve is closed and a no-load operation mode in which the water is fed into the actuation chamber and the air release valve is opened, wherein the control panel further executes a dry operation mode in which the water is prevented from being fed into the actuation chamber and with the air release valve is opened.

Abstract: An axial flow fan provided herein allows for a wide range of selection for placement of the fan and wiring of the lead wires.

Abstract: The invention relates to a fan, particularly for cooling an internal combustion engine of a vehicle, having an attachment unit, an electric drive motor, and a fan wheel rotating about the fan axis, wherein the attachment unit has a frame, from which bars protrude that cross through an air opening, said bars carrying an attachment element serving to attach the drive motor. The invention proposes that each of the bars (6) have a cross-sectional contour, wherein at least one cross bar (18) extending laterally in the direction of the fan axis (9) is configured between end regions (14, 15) of the bar (6) extending in the direction of the fan axis (9), defining a bar width (b).

Abstract: A hydraulic system, including fluid flow generated by a primary pump and a secondary pump, utilizes a regulator control assembly to control fluid flow from each of the primary and secondary pumps such that a desired fluid flow and pressure is maintained at the outlet for varying actuator demands. The regulator control assembly controls the transition from using only the primary pump, to using both the primary and secondary pumps to provide a desired fluid flow and pressure through the outlet to the actuator.

Abstract: A bladeless fan assembly includes a nozzle mounted on a base housing a motor and an impeller driven by the motor for creating an air flow. The nozzle includes an interior passage for receiving the air flow, a mouth for emitting the air flow, and a plurality of stationary guide vanes located within the interior passage and each for directing a portion of the air flow towards the mouth. The nozzle defines an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth.

Abstract: The invention relates to a pressure boost for fluids, in particular hydraulic fluids, having a booster piston and a control piston unit, wherein a low-pressure side of the booster piston can be alternately connected by the control piston unit via a cylinder line to a low-pressure feed line and a discharge line, and a high-pressure side of the booster piston can be alternately connected to a high-pressure load line and a low-pressure feed line, wherein the control piston unit has two elements which are embodied as seat valves and which each interact with one valve seat and which are designed such that one of the elements intermittently seals off the low-pressure feed line, which can be connected to the low-pressure side of the booster piston, and the other element intermittently seals off the discharge line, which can be connected to the low-pressure side of the booster piston.

Abstract: A vacuum pump system includes a vacuum pump with a brushless, multi-phase, synchronous motor with a permanently magnetically excited rotor, and a pump type recognition element, a control unit for controlling the vacuum pump and having a drive microcontroller and a final stage, and a further microcontroller that monitors a rotational speed of the motor and turning off the final stage in case the rotational speed of the motor exceeds a maximum allowable rotational speed of the motor, and that forms part of the control unit.

Abstract: A variable coolant pump for a cooling circuit of an internal combustion engine that has a pump housing in which is mounted a hollow shaft that is driveable by a pulley. At one end of the hollow shaft an impeller is fastened which has vanes projecting into an inlet chamber and which is firmly connected via axial bridges to a cover disc. Through rotation of the impeller together with the cover disc, water can be sucked into the inlet chamber via an inlet connection piece of the pump housing and conveyed by the vanes into an annular passage of the pump housing. A guide disc with a contour corresponding to the impeller is further arranged between impeller and cover disc. The guide disc is guided by the axial bridges and can be displaced axially via a positioning unit by a piston located inside the hollow shaft.

Abstract: A pump assembly includes a pump housing (2) with a fluid entry (6) and a fluid exit (8) for a fluid to be delivered. A stator housing (4) is connected to the pump housing (2). At least one cooling channel (12) is formed in a wall of the stator housing (4) and is connected to cooling channels (22, 24) in the pump housing (2), which are in connection with the fluid entry (6) and the fluid exit (8), so that the fluid flows through the at least one cooling channel on account of the pressure difference between the fluid entry (6) and the fluid exit (8).