Abstract: A method and system for detecting an anomaly in a pumped pipeline is disclosed. A data stream is received over time on operation of the pump and pump start and pump stop event data is obtained from the data stream. For each pair in time of a pump start event and preceding pump stop event in the data stream flow is calculated and compared to expected flow. Variation between calculated flow and expected flow is recorded as an exception and an alarm is triggered in dependence on the exception.

Abstract: An in-vehicle device includes a housing having an opening, an openable and closable cover disposed over the opening, a sealing member disposed around the opening such that the sealing member is held between the housing and the cover when the cover is closed, at least one first vibration sensor to measure mechanical vibration of the cover, and a degradation determiner to determine whether any degradation occurs in the sealing member. The degradation determiner determines whether any degradation occurs in the sealing member on the basis of the mechanical vibration measured by the at least one first vibration sensor while the cover is closed.

Abstract: A strain measuring device (100) is a strain measuring device (100) for measuring strain on an FEP (10), and includes a viscous body (101) that has a lower rigidity than the FEP (10) and covers an uneven surface of the FEP (10), and a strain gauge (102) that is attached to a portion of a surface of the viscous body (101).

Abstract: A peristaltic pump includes a plunger-cam follower, a tube receiver, a spring-biased plunger, a spring, a position sensor, and a processor. The plunger-cam follower engages the plunger cam to follow the plunger cam and to disengage from the plunger cam. The spring-biased plunger is coupled to the plunger-cam follower and the spring biases the spring-biased plunger toward the tube receiver. The position sensor determines a position of the spring-biased plunger when the plunger-cam follower is disengaged from the plunger came. The processor estimates fluid flow utilizing at least the position of the spring-biased plunger as indicated by the position sensor when the plunger-cam follower is disengaged from the plunger cam and the spring biases the spring-biased plunger against the tube.

Abstract: A diaphragm pump, includes a case, a diaphragm dividing a space in the case into a first space and a second space, a liquid feed flow path including an inflow path to introduce a liquid to be fed into the first space and an outflow path to discharge the liquid to be fed from the first space, a drive unit including a compression/decompression device that repeatedly causes displacement of the diaphragm by repeating compression and decompression of a driving fluid filling the second space, and a valve mechanism to open and close the inflow path and the outflow path. The drive unit includes a pressure release mechanism to release pressure of the driving fluid after the driving fluid is compressed or decompressed by the compression/decompression device.

Abstract: A method and associated paint finishing system are disclosed for performing predictive maintenance on equipment used for delivering liquid paint in a paint finishing facility. The method comprises: identifying a set of components of the equipment and associated maintenance requirements; for each of the components, providing a set of operating parameters (401-404) that affect useful service life of the component; for each component, providing an algorithm (410) relating the operating parameters to a remaining time by when a maintenance operation on the component is to be performed; monitoring each of the operating parameters (401-404) during operation of the paint finishing facility; for each component, applying the algorithm (410) with the monitored operating parameters (401-404) to calculate the remaining time for the component (420); and for each component providing to a maintenance operative an alert indication relating to the remaining time for the component.

Abstract: The approach presented here relates to a determination appliance (100) for determining a viscosity of a fluid. The determination appliance (100) has at least one determination device (110) and a provisioning device (115). The determination device (110) is designed to determine the viscosity of the fluid and/or a rotational speed (?) of a blade wheel (205) for conveying the fluid by using at least one detected volume flow of the fluid and a detected pressure difference of the fluid. The provisioning device (115) is designed to provide or send a viscosity signal (130) representing the viscosity determined by the determination device (110).

Abstract: A split can for a magnetic coupling includes a cylindrical jacket region and a base region connected to a first end of the jacket region. The jacket region has an inner wall and an outer wall enclosing the inner wall. The inner wall and the outer wall are spaced apart from each other in the radial direction by a gap, with the inner wall being integrally joined to the outer wall by a plurality of webs. The gap may be provided with a control medium which may be monitored to detect changes in one or more characteristics of the control medium indicative of split can leakage.

Abstract: Pumping segments are described herein. In certain embodiments, a peristaltic pumping segment include a tubing segment, a plunger, a downstream occluder, and an upstream check valve. The plunger is movable to selectively expand the pumping volume to draw in fluid flow and contract the pumping volume to administer the fluid flow. The occluder is movable to selectively engage against the downstream portion to prevent fluid flow from the downstream portion during expansion of the pumping volume and to permit fluid flow from the pumping volume through the downstream portion during contraction of the pumping volume. The check valve outlet is in fluid communication with the pumping volume, and the valve element is configured to permit fluid flow from the valve inlet to the pumping volume during expansion of the pumping volume and to prevent fluid flow from the pumping volume to the valve inlet during contraction of the pumping volume.

Abstract: A connection assembly between two portions of a line including an inner conduit for transporting a cryogenic fluid, the assembly including two flanges which are respectively arranged at the ends of the line portions and which are configured to be held in contact with one another by virtue of a fixing arrangement. The contact zone between the two flanges includes at least two grooves for positioning seals and at least one conduit opening out, for the one part, between the two seals and, for the other part, into an expansion chamber for the cryogenic fluid. The expansion chamber is arranged in one, or in the vicinity of one, of the first connection flange and the second connection flange. The expansion chamber includes a detector for detecting the presence of the cryogenic fluid in the expansion chamber or a recess configured for the installation of such a detector.

Abstract: The present invention controls convergent pressure of a closed space provided with a fluid resistance at high speed while an upstream valve provided on the upstream of the fluid resistance prevents overshooting. A pressure control system is provided with a fluid resistance in a channel forming a closed space and is configured to control pressure of the closed space by controlling an upstream valve provided on the upstream of the fluid resistance. The pressure control system includes a convergent pressure arithmetic unit and a valve controller. The convergent pressure arithmetic unit calculates convergent pressure of the closed space when the upstream valve is fully closed using at least one of upstream pressure and downstream pressure on the fluid resistance in the channel. The valve controller compares the calculated convergent pressure with a predetermined target convergent pressure and fully close the upstream valve based on the result of the comparison.

Abstract: A fluid-handling cassette comprising a plurality of diaphragm valves and pumps is configured to have its actuation ports located along a thin or narrow edge of the cassette. Actuation channel % within the cassette lead from the actuation ports to actuation chambers of the valves and pumps in a space between plates that comprise the cassette. The individual plates have a nominal thickness that is sufficient to provide a rigid ceiling for the actuation channels, but sufficiently thin to minimize the overall thickness of the cassette. The cassette can be plugged into or unplugged from an actuation receptacle or a manifold by its narrow edge. A plurality of such cassettes can be stacked together or spaced apart from each other to form a cassette assembly, providing for a convenient way to install and remove the cassette assembly from its actuation receptacle.

Abstract: A frangible disk arrangement including a frangible disk disposed in a groove of a housing, and a degradable material support disposed adjacent the disk. A method for managing a borehole operation including pressuring against the frangible disk arrangement, exceeding a pressure rating of the frangible disk, rupturing the frangible disk, and degrading the support. A borehole system including a borehole in a subsurface formation, a string in the borehole, and a frangible disk arrangement disposed within or as a part of the string.

Abstract: An infusion system for being operatively connected to a fluid delivery line and to an infusion container includes a pump, a plurality of different types of sensors connected to the pump or the fluid delivery line, at least one processor, and a memory. The plurality of different types of sensors are configured to indicate whether air is in the fluid delivery line. The memory includes programming code for execution by the at least one processor. The programming code is configured to, based on measurements taken by the plurality of different types of sensors, determine: whether there is air in the fluid delivery line; whether there is a partial occlusion or a total occlusion in the fluid delivery line; or a percentage of the air present in the fluid delivery line or the probability of the air being in the fluid delivery line.

Abstract: There are provided an operation number control device and a method for controlling the same that can level the operation times of the fluid machines, which are connected to the operation number control device. A fluid machine system comprises a plurality of fluid machines, and an operation number control device capable of individually controlling start and stop of the fluid machines. The operation number control device sets a continuous operation time for each of the fluid machines based on total operation times of the fluid machine and other fluid machines. When among fluid machines in operation, there is a fluid machine for which the continuous operation time set for the fluid machine has elapsed and there is a fluid machine at stop, the operation number control device causes the fluid machine at stop to start and causes the fluid machine to stop.

Abstract: The present invention relates to a method for moving a fluid comprising the steps a. providing a metering head comprising a metering chamber and a displacement element which delimits said metering chamber, b. moving the displacement element in a suction direction from a first position to a second position, wherein a volume of the metering chamber in the second position of the displacement element is greater than a volume of the metering chamber in the first position of the displacement element such that fluid is drawn into the metering chamber via a fluid inlet during a suction stroke, c. moving the displacement element in a pressure direction from the second position to the first position such that fluid is forced out of the metering chamber via a fluid outlet during a pressure stroke.

Abstract: A plurality of system control devices respectively include network interfaces for communicating with each other via a network. One of the plurality of system control devices functions as a master system control device, and the remaining system control devices function as slave system control devices. The master system control device transmits a control command to the slave system control devices by means of the network interface. The slave system control devices receive the control command by means of the network interfaces and supply an operation command to abatement devices in accordance with the control command. When unable to communicate with the master system control device, the slave system control devices either function as master system control devices or enter stand-alone operation mode.

Abstract: A fracturing apparatus includes: a plunger pump having a hydraulic end and a power end, wherein the power end comprises a power end oil outlet and at least one power end oil inlet that are coupled to each other; a power end lubricating system, including a lubricating oil tank defining an accommodation space, at least one lubrication pump having a lubrication pump oil inlet and a lubrication pump oil outlet that are coupled to each other, and at least one lubrication motor configured to provide power for the at least one lubrication pump; a temperature detector disposed on any one of the oil return pipeline, the power end oil outlet, and the lubricating oil tank; and a control system connected to the temperature detector and the power end lubricating system and configured to control the power end lubricating system.

Abstract: A pulsation damping system for reducing pressure oscillations in an inlet line and/or in an outlet line of a piston pump. The piston pump includes a pump chamber which is connected to the inlet line of the piston pump via a first fluid connection and to the outlet line of the piston pump via a second fluid connection to convey a conveyance fluid. The pulsating damping system includes a damping device. The pump chamber includes a damping fluid connection via which the pump chamber is fluidically connected to the damping device to damp the pressure oscillations.

Abstract: A liquid leak detector for a pump is described. The liquid leak detector is mountable on a pump to detect leaked fluid coming from the pump. The leak detector includes a buffer tube positioned on the pump to collect a leaked fluid from the pump and a sensor positioned on the buffer tube to detect the level of leaked fluid in the buffer tube and to generate a signal when the leaked fluid reaches a maximum fluid level. A purge line on the buffer tube removes leaked drive fluid from the buffer tube once the leaked drive fluid reaches a maximum level. Logic connected to the sensor receives the signal from the detector and generates an alarm.

Abstract: Provided is a pumping system that includes a parallel dual chamber pumping mechanism and an attachable disposable cassette. The disposable cassette may include a multi-laminate membrane, which facilitates efficient, accurate and uniform delivery of fluids. The membrane can be held in intimate contact with the pumping fingers of the pumping mechanism by electrostatic or magnetic attraction, thereby allowing the pump to pull a vacuum without the need for a preloaded elastomeric pumping segment.

Abstract: A water jacket is attempted to include a means to provide high heat transfer between coolant and a side wall of a cooling passage to increase a heat transfer capacity thereof. A liquid-cooled motor includes a motor case, a motor provided in the motor case, a motor housing provided in the motor case, and a water jacket provided in the motor housing, the water jacket having a circular shape to allow coolant to flow in a circumferential direction. The water jacket includes a cooling passage in which the coolant flows, the cooling passage having a passage width reduced gradually, a coolant supply port to supply the coolant to the cooling passage, and a coolant drain port to drain the coolant from the cooling passage.

Abstract: A method of assigning an identifier to a controller of a modular vacuum pumping and/or abatement system, the method including: determining, by a first controller of the modular vacuum pumping and/or abatement system, that a first identifier is to be assigned to a second controller of the modular vacuum pumping and/or abatement system, wherein the second controller is located at a module of the modular vacuum pumping and/or abatement system; transmitting, by the first controller, a first signal indicative of the first identifier to the second controller; receiving, by a user input device coupled to the module, a user input; and adopting, by the second controller, the first identifier as its identifier in response to the user input.

Abstract: A pump for inflating tires with air is provided. The pump includes a body having a base and a top portion and a cutout configured to receive a tire of a bicycle. The base is configured to be anchored to the ground. The pump includes a handle assembly including a piston rod and a handle bar. The pump includes a tube positioned in the body and secured to at least one plate in the body. The tube slidably receives the piston rod and is connected to an air line. The pump includes a hose connected to the air line and extending from the body. The hose has a head configured to engage a nozzle of the tire. When the piston rod is moved downward within the tube, air is displaced from the tube and through the air line to the hose such that the head dispenses air.

Abstract: An applicator system for containing and dispensing a cosmetic substance may include a container defining a cavity and including an open first end and a closed second end, a dispensing mechanism operably coupled with the first end of the container, and an applicator. The dispensing mechanism includes an elongated body defining a dispensing cavity and further includes at least one flexible region engageable by a user. The applicator includes an external surface and an interior cavity that may accommodate at least a portion of the dispensing mechanism. Upon engaging the at least one flexible region of the dispensing mechanism, a predetermined quantity of cosmetic substance is dispensed to the external surface of the applicator.

Abstract: An air inflation device includes an inflation unit defining an interior space, a handgrip unit connected to the inflation unit, and a pressure measuring mechanism disposed in the handgrip unit and including a first tubular member defining a receiving space, and a second tubular member defining a flow guide channel that has an air inlet communicating with the interior space, and an air guide hole communicating with the receiving space. A measuring unit is disposed in the receiving space and has a free end pushed to move relative to the first tubular member by air entering the receiving space from the flow guide channel. An indicating unit indicates a position of the free end in the first tubular member.

Abstract: A sensing device for a centrifugal slurry pump having an impeller which rotates about an axis, the centrifugal slurry pump including a side liner and a main liner housed within an outer casing of the pump, the sensing device comprising; a body portion arranged to pass through the outer casing, wherein the body portion includes a sensor biased towards contact with either the side liner or the main liner of the pump.

Abstract: An air inflation device includes an inflation unit having an air outlet channel extending along a first axis, and an insertion channel extending along a second axis transverse to the first axis and partially communicating with the air outlet channel. A pressure gauge unit is rotatably mounted on the inflation unit and includes a pressure gauge, and a shaft extending outwardly from the pressure gauge and inserted into the air outlet channel. The shaft has an annular groove formed in an outer peripheral surface thereof and corresponding to and communicating with the insertion channel. An air guide unit includes a manifold inserted into the insertion channel and engaging the annular groove.

Abstract: A supplementary device configured to be attached to a drug delivery device, the supplementary device including: first means being adapted to mechanically couple the supplementary device to a dosage selector of the drug delivery device; second means being adapted to select a dosage to be delivered by the drug delivery device; third means being adapted to mechanically couple the second means to the first means such that a dosage selection made with the second means generates a torque being transferred via the third means to the first means; a sensor configured to output signals indicative of the generated torque; and electronics configured to receive the signals output from the sensor and to determine based on the signals the selected dosage.

Abstract: A well unloading valve for a petrochemical well tubing comprising a flow passage connecting an annulus outside the tubing with the inside of the tubing; a lock-out sleeve for selectively closing the flow passage, wherein the lock-out sleeve can be moved from an open to a closed position by means of hydraulic pressure within the tubing; an electrically activated motor module for moving a seal, wherein the seal selectively opens a hydraulic connection from the inside of tubing to the lock-out sleeve for moving the lock-out sleeve hydraulically from the open to the closed position; and a check valve within the flow passage for allowing a flow from the annulus into the tubing and for blocking a flow from the tubing into the annulus. Further a method for unloading a petrochemical well tubing is claimed.

Abstract: A method according to one embodiment includes receiving real-time sensor data from a plurality of pump sensors, wherein each pump sensor of the plurality of pump sensors is configured to generate sensor data associated with at least one characteristic of the pump's operation, comparing the real-time sensor data to at least one threshold value, determining fault information in response to determining the real-time sensor data is outside of one or more of the at least one threshold value, determining a real-time operating point of the pump on a pump performance curve associated with the pump based on the real-time sensor data, displaying, on a graphical user interface of an administrative device, the real-time operating point of the pump on the pump performance curve, and displaying, on the graphical user interface of the administrative device, the fault information in real time.

Abstract: A system can include one or more processors; memory; a data interface that receives data; a control interface that transmits control signals for control of pumps of a hydraulic fracturing operation; and one or more components that can include one or more of a modeling component that predicts pressure in a well fluidly coupled to at least one of the pumps, a pumping rate adjustment component that generates a pumping rate control signal for transmission via the control interface, a capacity component that estimates a real-time pumping capacity for each individual pump, and a control component that, for a target pumping rate for the pumps during the hydraulic fracturing operation, generates at least one of engine throttle and transmission gear settings for each of the individual pumps using an estimated real-time pumping capacity for each individual pump where the settings are transmissible via the control interface.

Abstract: A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.

Abstract: A system and process for predicting the failure of a machine begins with the step of loading a slope signature library into the control system, in which the slope signature library correlates time-to-failure based on rates of change of one or more measured conditions. The process includes the steps of activating the machine, determining baseline measurements, and detecting an out-of-spec measurement. Once an out-of-spec measurement is made, the process includes the determination of the rate of change for the out-of-spec measurement. A slope signature is calculated based on the rate of change for the measured condition, which is compared against the slope signature library to determine a predicted time-to-failure based on the calculated slope signature, and outputting the predicted time-to-failure. The process can be used to modify the operation of the machine to extend the predicted time-to-failure.

Abstract: Various aspects of the subject disclosure relate to a compounder system having a cartridge that includes controllable fluid pathways. One or more rotary piston pump/valves may be used to move fluid and/or gasses through the various fluid pathways of the cartridge. For example, the cartridge may include a dedicated rotary piston pump/valve for each process that moves fluid and/or gas through the cartridge. When turning, the rotary piston pump/valve acts as a pump to move the fluid or gas, and when the rotary piston pump/valve stops turning, it effectively acts as a shutoff valve, preventing any fluid flow. Magnetic couplers for the cartridge may be provided on a pump head of the compounder system.

Abstract: A system including a tube and a force sensor coupled to a wall of the tube via a restraining element and configured to obtain a value of a tubing force when the tube is deformed by the restraining element. The system includes a processor to determine parameters for fitting a curve including the value of the tubing force, to determine a fluid pressure value for a fluid in the tube based on the parameters for fitting the curve, and to activate an alarm responsive to the fluid pressure value and to the parameters for fitting the curve when an occlusion condition is identified in the tube. The parameters for fitting the curve comprise at least one time-decaying parameter(s) associated to the tubing force. A method for using the system and a non-transitory computer readable medium including instructions to perform the above method are also provided.

Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element.

Abstract: An infusion pump for delivering an intravenous (“IV”) fluid includes a housing comprising an actuation area that engages a portion of an IV tube. The actuation area includes a first end that receives the IV tube from a fluid container and a second end that provides the IV tube to a patient. The housing also includes a seal section located along a perimeter of at least a portion of the actuation area. The seal section includes a gasket rib positioned along the seal section and a tube channel configured to cradle the IV tube. The example infusion pump also includes a door connected to the housing and configured to engage the gasket rib to enclose the actuation area of the housing.

Abstract: A power-saving optimization operation method and switching point determining method for a water pump unit. In the parallel water pump units, k water pumps converters form a sub-pump unit A. The water output Q1 of a first water pump in the sub-pump unit A, the input power P1 of the frequency converter corresponding to Q1 and the operating frequency f1 of the frequency converter corresponding to Q1 are recorded, where QA=Q1, PA=P1. The QA-PA curve of an operating water pump serves as the working curve w1, where QA=mQ1 and PA=mP1, and k?m?2. The working curve wm of m operating water pumps operating at the same frequency is obtained, where f1=f2= . . . =fm. The intersection point of the working curve wm-1 and the working curve wm is the optimal switching point between m-1 operating water pumps and m operating water pumps under the constant pressure Hs.

Abstract: An electric diaphragm pump having a pump head assembly in a first housing, a motor assembly in a second housing, a fluid sensor, and a leak alert system and/or pump shut-off system. The fluid sensor detects a presence of fluid which has leaked outside of a pump chamber and is located within a cavity of the diaphragm drive chamber. The leak alert system indicates that fluid has been detected by the fluid sensor and the shut-off control system stops operation of the pump based on fluid being detected by the fluid sensor.

Abstract: An improved valve leak detection system. The improved valve leak detection system comprises a membrane pump defining a flow path arranged to be opened and closed by at least one valve, a measuring device, a comparator, and a signal generator. The measuring device is configured to determine a conductivity value between two points on the flow path of the membrane pump, one point arranged upstream of the at least one valve and the other point arranged downstream of the at least one valve. The measuring device measures the conductivity value when the at least one valve is closed. The comparator is configured to continuously monitor the conductivity value. The signal generator is arranged to provide an output signal when the conductivity value is indicative of a valve leak condition for a set number of measurements within a set period of time.

Abstract: A variable-pressure air pump includes a first cylinder with a first chamber and a second cylinder with a second chamber movably connected with one another. The second chamber fluidly communicable with the outside of the variable-pressure air pump selectively. A discharge device includes a connecting member and a switch movably connected with one another. The connecting member defines at least one discharge hole fluidly connecting with the second chamber. The switch has at least one flow guide portion and at least one blocking portion. The switch is movable between a first position in which the at least one flow guide portion is adjacent and opens to the at least one discharge hole and a second position in which the at least one blocking portion is adjacent to and blocks the at least one discharge hole.

Abstract: A methods and system to operate hydraulic fracturing units may include utilizing hydraulic fracturing unit profiles. The system may include hydraulic fracturing units may include various components. The components may include an engine and associated local controller and sensors, a transmission connected to the engine, transmission sensors, and a pump connected to the transmission and powered by the engine via the transmission and associated local controller and sensors. A supervisory controller may control the hydraulic fracturing units. The supervisory controller may be in communication with components of each hydraulic fracturing unit. The supervisory controller may include instructions to, for each hydraulic fracturing units, obtain hydraulic fracturing unit parameters, determine a hydraulic fracturing unit health assessment, and build a hydraulic unit profile including the health assessment and parameters.

Abstract: A pumping system for fracking fluid is designed to provide nearly constant flow rate. The pumping system includes a set of linear actuator pumping units, each driven by at least one electric motor. Each pumping unit includes a hollow threaded shaft driven by the linear actuator, two hollow cylinders fixed to an interior of the hollow shaft, and hollow pistons in each of the hollow cylinders. The hollow cylinders and hollow pistons form two pumping chambers. A first pumping chamber expels fluid when the linear actuator is moving in a first direction and a second pumping chamber that expels fluid when the linear actuator is moving in an opposite direction. The speeds of the actuators are coordinated such that a total flow rate of the pumping system is substantially constant.

Abstract: To compensate for an event, equipment may require a power down sequence of a motor connected to a pump to prevent the pumping of servicing fluid at a high pressure, high pressure fluid may be required to be diverted to a reservoir or otherwise diverted from a wellhead, multiple pumping systems may require that pumping pressure be altered or adjusted or that flow rate be altered or adjust to manage or control the conditions to protect equipment or personnel at a site. Activating, adjusting or altering an operational characteristic of equipment by using a control system may automatically initiate the most efficient and effective mitigation steps for equipment at a site when condition is detected or predicted. Collecting and analyzing information from devices, components, sensors, control systems, other equipment or any combination thereof at a site by a master control system provides automated control of pressure sensitive conditions.

Abstract: An apparatus includes a pump body, two or more arms extending from the pump body configured to hold a cement mixing container, a vacuum port exposed on an exterior surface of the pump body and positioned to engage a port on the cement mixing container, a venturi positioned proximate the vacuum port; a perforator within the pump body, the perforator configured to puncture a gas container to release gas to the venturi to create a vacuum at the vacuum port; and an actuator configured to puncture the gas container with the perforator.

Abstract: A sensor-less detection circuit includes a first voltage adjustment circuit providing a first output voltage at a first node using one of three input voltages. A second voltage adjustment circuit provides a second output voltage at a second node using all three, or only two, of the three input voltages. The second voltage adjustment circuit acts as an internal virtual neutral point for detecting a zero crossing event of the motor. A differential amplifier is coupled with the first and second nodes and outputs a third output voltage at a third node. A reference buffer has a reference voltage input and provides a fourth output voltage at a fourth node. A comparator is coupled with the third and fourth nodes and outputs a fifth output voltage at a fifth node, the fifth voltage indicating a zero cross event.

Abstract: A compressor includes a casing that stores lubricant at a bottom, a compression mechanism disposed in the casing to suck and compress a refrigerant, and an oil return member forming an oil return flow path that extends in a top-to-bottom direction to guide the lubricant discharged from the compression mechanism downward. The oil return flow path includes a uniform-cross-section flow path, and a varying-cross-section flow path continuous with a lower end of the uniform-cross-section flow path. A lower end of the varying-cross-section flow path forms an outlet of the oil return flow path and lies along an inner surface of the casing. A the lower end of the varying-cross-section flow path has a greater width than an upper end of the varying-cross-section flow path, and the lower end of the varying-cross-section flow path has a smaller thickness than the upper end of the varying-cross-section flow path.

Abstract: A pump includes a seat unit, a motor unit and a leak detector. The motor unit includes a rotor, an inner case body, an outer case body and a stator. The inner case body has an inner end wall. The outer case body is sleeved on the inner case body and has an outer end wall. The outer end wall cooperates with the inner end wall to define a liquid-receiving space therebetween. The leak detector is disposed on one side of the outer end wall opposite to the liquid-receiving space and includes a sensor for detecting the change of the electrostatic capacity between the liquid-receiving space and the sensor.

Abstract: A fluid sensing apparatus and a method for detecting pressure and a presence of bubbles within a fluid tube. The fluid sensing apparatus comprises a housing configured to receive a portion of the tube and to house a pressure sensor and an ultrasonic transmitter. The pressure sensor is positioned adjacent the tube and is configured to receive a pressure sensor signal, which correlates to a detected pressure differential within the tube. A controller transmits a drive signal to the ultrasonic transmitter, which emits ultrasonic waves through the portion of the tube and to the pressure sensor. The pressure sensor receives both the ultrasonic waves and the pressure sensor signal, and subsequently transmits an output signal to the controller. In a presence of a pressure differential or a bubble within the tube, the output signal will exhibit a DC shift or a distortion of signal characteristics of the output signal, respectively.