Abstract: A bistable solenoid valve device for a fluid system is provided. The bistable solenoid valve device comprises a bistable solenoid valve. The bistable solenoid valve comprises a permanent magnet. The bistable solenoid valve further comprises an armature displaceable between a first armature position and a second armature position. The bistable solenoid valve further comprises a first switching coil for energization for a displacement of the armature into the first armature position. The bistable solenoid valve further comprises a second switching coil for energization for a displacement of the armature into the second armature position. The bistable solenoid valve further comprises an evaluation device adapted to measure an induced coil voltage, an induced coil current, or both the induced coil voltage and the induced coil current, at one or more of the non-energized switching coils. The evaluation device is further adapted to assess a switching behavior of the armature.

Abstract: A mixing valve that includes a housing having a first outlet, a second outlet, and a mixing chamber; a first flow control valve for controlling flow through the first outlet to the mixing chamber; and a second flow control valve for controlling flow through the second outlet to the mixing chamber; wherein the housing has a length dimension, a width dimension, and a thickness dimension, and the largest of these dimensions is no more than approximately 65 millimeters.

Abstract: An air valve assembly for use with inflatable articles is provided. The air valve assembly includes a valve base (10), a valve body (20), an inflation adapter (30), a plug (40) and a fixing ring (50). The air valve assembly provides for inflation of the inflatable article through two different sized air passages, allowing inflation by multiple sizes of air inflation hoses or nozzles. The air valve assembly also provides for quick deflation of the inflatable article through a third and larger sized air passage. The configuration of the air valve assembly may be easily changed by hand without the need for tools, allowing for easy and efficient inflation or deflation of the inflatable article.

Abstract: A method for monitoring a reaction and a reaction system are provided. The reaction system includes at least one vessel for the reaction medium, which is in fluid communication with an injection tube; at least one vessel for a carrier fluid that is immiscible with the reaction medium, which is in fluid communication with a reaction tube; the injection tube being mounted so as to lead into the reaction tube such that individual drops of the reaction medium can be injected into the reaction tube and into the immiscible carrier fluid, so as to form a train of reaction chambers; at least one detector for monitoring a reaction; a means for classifying the reaction chambers; and at least one means for recirculating reaction chambers in front of at least one detector for monitoring a reaction.

Abstract: The disclosure provides methods and systems for analyzing fluid samples comprising obtaining fluid samples in at least one cavity of a substrate and introducing also buffers and/or reagents in the cavity, performing nucleic acid extraction and/or purification in the cavity, and performing nucleic acid amplification in the same cavity.

Abstract: A conduit locking device includes a housing having a first end, a second end, and a sidewall disposed between the first end and the second end. The conduit locking device may further include a slide engaged with the sidewall of the housing, the slide including an extension arm and an end portion structurally configured to engage with an inner wall of a conduit. The slide may be extendable via the extension arm from a first position substantially adjacent to the sidewall of the housing to a second position disposed away from the sidewall of the housing, where, when in the second position, the slide is configured to retain the conduit locking device at a fixed position within the conduit through the engagement of the end portion with the inner wall of the conduit.

Abstract: The invention relates to micro-channeled and/or nano-channeled polymer compositions for structural and thermal insulation composites and methods of preparing the same. The composites can be tailored to achieve desired mechanical and thermal insulation properties.

Abstract: A technique to characterize moisture in a dielectric layer of a printed circuit board is provided. A method comprises applying a test signal to test circuitry comprising a test capacitor that is formed with the dielectric layer of the printed circuit board; measuring at least one characteristic of a least one of signal transmission and signal reflection from the test circuitry; and determining, from the at least one measured characteristic, at least one parameter value indicative of moisture content in the dielectric layer.

Abstract: Embodiments of the disclosure provide a method and system for removing water build-up in a hydrocarbon storage tank. An oil-water interface sensor is located in the hydrocarbon storage tank and includes a first probe and a second probe. The first probe is located at a bottom portion of the hydrocarbon storage tank. The first probe generates a first input data stream. The second probe is located above the first probe. The second probe generates a second input data stream. The first and second input data streams are processed to determine a vertical displacement of an oil-water interface, which is compared against a predetermined value. An output data stream responsive to the comparison is generated including instructions to maintain a controllable valve either in an open position or in a closed position.

Abstract: A method includes placing a downhole acquisition tool in a wellbore in a geological formation containing a reservoir fluid. The method includes performing downhole fluid analysis using the downhole acquisition tool to determine at least one measurement of the reservoir fluid. The method includes using a processor to estimate at least one fluid component property by using an equation of state based at least in part on the at least one measurement of the reservoir fluid and to simulate a diffusion process using a diffusion model that takes into account the at least one estimated fluid property to generate a composition path. The method includes using a processor to estimate one or more phase envelopes based in part on the at least one fluid property and compare the one or more phase envelopes with the composition path. The method includes outputting a visualization identify potential areas of asphaltene instability.

Abstract: A jumper manifold for use in a fracing system including a first outlet interface for coupling to a first outlet line, a second outlet interface for coupling to a second outlet line, and an inlet interface for coupling to an inlet line carrying a slurry under pressure. A jumper, in a first configuration, couples the inlet interface with the first outlet interface for transporting slurry from the inlet line to the first outlet line while isolating the second outlet line. The jumper, in a second configuration, couples the inlet interface with the second outlet interface for transporting slurry from the inlet line to the second outlet line while isolating the first outlet line.

Abstract: The present disclosure includes methods of making a brine solution that include recirculating brine solution to a salt and water hopper from a holding tank. The present disclosure also includes an apparatus for making a solution that includes at least one nozzle assembly positioned inside the lower half of a hopper. The at least one nozzle assembly includes a manifold having at least two nozzles spaced apart. Each nozzle has one or more nozzle outlets that are directed away from the bottom of the hopper (e.g., toward the top of the hopper).

Abstract: A water path control valve structure for flushing the toilet lid, which is divided into upper and lower valve parts, including a valve body, a linkage valve core and a sealing component. The sealing component is installed on the linkage valve core, and the linkage valve core is arranged in the hollow valve body and one end of the linkage valve core extends out of the valve body. The linkage valve core includes an upper valve core and a lower valve core arranged coaxially, and one end of the upper valve core extends out of the valve body. The upper and lower valve cores are respectively installed with the sealing member.

Abstract: Silane-crosslinkable polymeric compositions comprising a polyolefin having hydrolyzable silane groups, an acidic silanol condensation catalyst, and a phenolic antioxidant. The phenolic antioxidant has a phenol-based moiety fused with a cyclic ether where the oxygen atom of the cyclic ether is located in the para position relative to the hydroxyl group of the phenol-based moiety. Such crosslinkable polymeric compositions can be employed in various articles of manufacture, such as in the wire and cable industry.

Abstract: Systems and methods for detecting water leaks using a security and/or automation system includes receiving total water usage data for a home, receiving water usage data for known sources in the home, receiving occupancy data for at least one occupant in the home, and determining a water leak based at least in part on the total water usage data, water usage data for known sources, and occupancy data.

Abstract: A pressure system for liquid chromatography allows multiple fluid lines to be driven in parallel by a single pump. A fluid pressure medium supply provides fluid pressure to the system. The fluid pressure medium supply is connected to a plurality of fluid transfer pipes, each with a flow limiter. The fluid pressure medium supply is configured to provided more flow than the flow limiters combined, and excess flow is either diverted with a pressure limiter or reduced with a pressure adjuster, or both. Further layers of pressure and flow control may be added with additional pressure limiters and/or pressure adjusters and flow limiters connected together. In some cases, multiple lines containing different fluids may be driven by the same pressure source through the use of flexible fluid delivery inner containers, each within a rigid container that is pressurized by the pressure source.

Abstract: A waste oil transfer system includes a system controller configured to determine the authorization status of a waste oil transfer request. The system controller requests a current fluid level in a storage tank from a tank level monitor mounted on the storage tank. The tank level monitor is configured to generate current fluid level information and provide that information to the system controller. The system controller determines the available space in the storage tank and compares the available space to the transfer volume to determine if the storage tank can receive the transfer volume. The system controller then activates a pump to initiate the transfer if the system controller determines that the transfer is authorized or denies the transfer.

Abstract: An amount Y of liquid hydrogen that has passed through a first valve and has been volatilized during a predetermined time after first and second valves are opened is calculated by using a pressure P0 in an internal space of a liquid hydrogen tank measured before the two valves are opened, a pressure P1 in the internal space measured after the lapse of the predetermined time since the two valves are opened, and an amount X of the gaseous hydrogen that has passed through the second valve during the predetermined time. A fluid level H of the liquid hydrogen in the liquid hydrogen tank after the lapse of the predetermined time since the two valves are opened is calculated by using a expression showing a relationship between the H and an amount Y1 of the liquid hydrogen that passes through the first valve and drops therefrom, and the Y.

Abstract: A system includes a turbo pump that converts a compressed gas into power, and a storage tank configured to store the compressed gas. The system also includes a fire suppression control valve configured to be coupled between the storage tank and a cargo compartment of the aircraft and having a closed position in which the compressed gas is prevented from flowing to the cargo compartment and an open position in which the compressed gas flows to the cargo compartment to suppress a fire. The system also includes a pump control valve configured to be coupled between the turbo pump and the storage tank and having a closed position in which the compressed gas is prevented from flowing to the turbo pump and an open position in which the compressed gas flows to the turbo pump to cause the turbo pump to convert the compressed gas into the power.

Abstract: An intermittent fluid delivery system includes a fill tank and a batch tank which is connected to the fill tank via a first pump and a first hose. The fill tank holds a first quantity of fluid. The batch tank holds a second quantity of fluid, which is lesser than the first quantity. The first pump delivers fluid from the fill tank to the batch tank. A second pump delivers fluid from the batch tank to a receiving tank.

Abstract: An actuator for use in a control valve assembly that has a structure amenable to manufacture. The actuator may comprise a housing comprising a plurality of walls secured to one another with fasteners to form an interior cavity, a torque hub disposed in the interior cavity, the torque hub comprising a torque body and a torque arm that are releasably engaged with one another via fasteners, each of the torque body and the torque arm having interfacing geometry that defines surfaces that engage with opposing surfaces on the other; and a load generator coupled with the torque hub.

Abstract: A measurement of the pressure of hydraulic fluid in a fluid working machine can be determined from the timing of the movement of valves which selectively seal a working chamber of cyclically varying volume from a fluid gallery. The timing of opening of a low pressure valve, to connect a working chamber to a low pressure fluid gallery, following the closure of a high pressure valve to seal a working chamber can be used to estimate the pressure in the high pressure fluid gallery at the moment of closure of the high pressure valve.

Abstract: A fluid processing method with which processing properties of fluids to be processed can be effectively controlled. Processing surfaces which are capable of being brought closer to each other and being separated from each other, and which rotate relatively are provided. A fluid to be processed is made to pass from inside to outside in a processing area between the processing surfaces to obtain a fluid thin film, and the resultant fluid thin film of the fluid to be processed is subjected to processing. Processing properties are controlled by changing the ratio of the distance to an outer peripheral end from a centre of rotation.

Abstract: A water management system effective for managing and metering water usage and detecting and reducing water leaks is described herein. The water management system can detect a leak when a volume of water flow or change in water pressure detected by a water meter of the system is uncharacteristic for a given day and time of day at the node. Upon detecting the leak, the system alerts the user, and in some situations, remotely shuts off a water supply to preemptively address a water leakage issue.

Abstract: An intravenous (IV) set system comprising a primary IV set having a plurality of access points facilitating access to one or more fluid pathways of the primary IV set, and an IV extension set removably coupled to the primary IV set to form an extended primary IV set, the IV extension set comprising an extension flow line defining an extension flow path, and a plurality of access ports on the extension flow line, at least two of the access ports comprising access ports located between first and second ends of the IV extension set. The IV set system further comprises a bypass manifold externally and removably coupled to the extension flow line of the IV extension set via the intermediate access ports on the extension flow line, the bypass manifold comprising a bypass flow line adjacent the extension flow line, and one or more access points that facilitate access to the bypass flow line, wherein the bypass manifold and the bypass flow line are operable to provide a bypass flow path through the IV extension so.

Abstract: Microfluidic systems and methods for arranging a set of objects. In an exemplary method, the set of objects may be transported in carrier fluid along a microfluidic channel structure having a reformatting zone including an object-accessible region and at least one object-excluding region. A portion of the carrier fluid may be moved from the object-accessible region to the at least one object-excluding region in an upstream section of the reformatting zone, to reduce a spacing of objects of the set. The portion of the carrier fluid may be directed into the object-accessible region from the at least one object-excluding region in a downstream section of the reformatting zone, to increase a spacing of objects of the set. The steps of moving and directing in combination may increase the spacing between objects disproportionately for a subset of the objects that are closest to one another.

Abstract: A method of installing a trough or trench for containing a cryogenic spill, includes the step of constructing multiple precast concrete sections at a first location, each section having a bottom wall and spaced apart side walls connected to and extending up from the bottom wall. Each section has end portions that enable connection to another concrete section. The method includes (at the first location), preparing multiple panels of polymeric concrete material by filling one or more molds with a slurry or liquid polymeric concrete material and after time allowing the material to cure and harden. At the first location, one or more of the panels is adhered to the bottom wall and side walls of each concrete section using an adhesive. After adhering of the panels to the concrete sections, the concrete sections are transported from the first location to a second location that is remote from the first location.

Abstract: Described herein are plasma generation devices and methods of use of the devices. The devices can be used for the cleaning of various surfaces and/or for inhibiting or preventing the accumulation of particulates, such as dust, or moisture on various surfaces. The devices can be used to remove dust and other particulate contaminants from solar panels and windows, or to avoid or minimize condensation on various surfaces. In an embodiment a plasma generation device is provided. The plasma generation device can comprise: a pair of electrodes positioned in association with a surface of a dielectric substrate. The pair of electrodes can comprise a first electrode and a second electrode. The first electrode and second electrode can be of different sizes, one of the electrodes being smaller than the other of the electrodes. The first electrode and second electrode can be separated by a distance and electrically connected to a voltage source.

Abstract: An agricultural implement including a toolbar, a plurality of row units connected to the toolbar, and a pneumatic seeding system. The pneumatic seeding system includes at least one storage tank configured for storing the particulate matter, a plurality of fluid lines fluidly interconnecting the at least one storage tank with each row unit of the plurality of row units, a fan fluidly connected to the at least one storage tank and to the plurality of fluid lines, and at least one pinch valve fluidly coupled to at least one fluid line of the plurality of fluid lines for adjustably balancing a respective airstream within the at least one fluid line of the plurality of fluid lines.

Abstract: A control valve is provided for a fluid treatment apparatus, including a housing with at least one cylinder defining a fluid flow path in the apparatus, each cylinder having an associated reciprocating piston valve. The valve includes a first piston valve half; a second piston valve half complementary to the first piston valve half; and a resilient seal constructed and arranged for being sandwiched between the first and second piston valve halves. The first piston valve half is constructed and arranged for engaging the cylinder before the second piston valve half, and having an exterior peripheral edge defined by a plurality of peripherally spaced teeth creating flow spaces between the teeth.

Abstract: A system and method of purge testing for welding piping, including flowing a purge gas through a test pipe, determining concentration of a gas component in the purge gas discharged from the test pipe, and determining a time period to reach a lower threshold of the concentration. The testing may consider different flow rates, pipe sizes, and inlet/outlet bore sizes.

Abstract: Provided that elapsed time from the start of the flow-in of an eluent into a column is t0 and the mobility Rfc(t/t0) of a component c in a sample is represented by a function of elapsed time t from the start of the flow-in of a sample into the column, elution time trc from the flow-in of the sample into the column to the flow-out of the component c from the column is calculated by using Equation (1). In doing so, the mobility Rfc(t/t0) in Equation (1) is represented by Equation (2).

Abstract: Among other things, a dispensing device is described herein. A sensor component of the dispensing device includes an emitter (e.g., of an emitter array) in optical communication with a detector array for sensing objects disposed between the emitter and the detector array. An object detector is configured to identify a presence of an object between the emitter and the detector array based upon a readout signal generated by the detector array. A calibration component is configured to recalibrate the object detector responsive to determining that an obstruction is present between the emitter and the detector array. The recalibration allows the detector array and the emitter array to detect the presence of an object regardless of the obstruction. A material (e.g., soap, sanitizer, etc.) may be dispensed from the dispensing device responsive to detecting the presence of the object.

Abstract: A system is provided for tracking usage of a plurality of water appliances in a distributed water infrastructure. The system may comprise at least one processor configured to receive, from a location in the distributed water infrastructure upstream of the plurality of water appliances, historical water usage measurements; determine from the historical water usage measurements at least one unique water usage signature associated with each of the plurality of water appliances; receive, from the location in the distributed water infrastructure upstream of the plurality of water appliances, current water usage measurements; determine from the current water usage measurements at least one current water usage signature; compare the current water usage signature with at least one of the unique water usage signatures stored in memory to determine a match; and, based on the signature match, ascertain an identifier of a water appliance in current use.

Abstract: A work machine includes an operation intention determining section that determines whether or not an operator has an intention of operating an operation member based on a state change of the operation member, a current supply section that supplies a current to a solenoid valve device based on an operation of the operation member, and a current control section that permits supply of a standby current from the current supply section to the solenoid valve device when it has been determined by an operation position determining section that the operation member is disposed within a preset neutral range and it has been determined by the operation intention determining section that there is an intention of operating the operation member, the standby current being lower than a current of the time when a hydraulic actuator starts driving.

Abstract: Provided is a heat pump hot water supply apparatus configured to directly supply water heated by a gas cooler to a utilization side. The heat pump hot water supply apparatus is configured to execute operation modes including a first operation mode and a second operation mode. The first operation mode includes causing the water heated by the gas cooler to return to a water tank as intermediate-temperature water. The second operation mode is an operation mode to be performed after the first operation mode, and includes mixing the water heated by the gas cooler and the intermediate-temperature water in the water tank, and directly supplying the mixed water to the utilization side.

Abstract: A dialysate-extracting apparatus in which a collecting port can be disinfected with no disinfecting work to be performed by a worker. A dialysate-extracting apparatus includes a dialysate-extracting device having an introduction port and a discharge port each of which is connected to the flow route for liquid and allows the liquid to flow therethrough, and a collecting port from which the liquid flowing in the flow route is collectable; and an opening-and-closing device that is movable between a closing position where the opening-and-closing device covers the collecting port of the dialysate-extracting device and an opening position where the opening-and-closing device 6 opens the collecting port. The dialysate-extracting apparatus further includes an ultraviolet-applying device attached to the opening-and-closing device and that is capable of applying ultraviolet rays to the collecting port when the opening-and-closing device is at the closing position.

Abstract: Provided is a fluid control device that achieves high sealing performance at full closure, and can suppress damage to a valve body or a valve seat surface even without mechanical accuracy improvements. The fluid control device includes: a fluid control valve provided in a flow path through which fluid flows: and a control mechanism that controls the fluid control valve. The fluid control valve includes: a valve seat surface; a valve body that contacts and separates from the valve seat surface; and an actuator that drives the valve body. Further, the control mechanism includes a speed adjustment part that when the valve body is brought close to the valve seat surface in order to fully close the fluid control valve, and the valve seat surface and the valve body reach a predetermined distance apart, reduces the moving speed of the valve body more than before reaching the predetermined distance.

Abstract: A valve assembly used with a process chamber for depositing a film on a wafer. A valve body surrounds a bore and includes an inlet, a first outlet and a second outlet, at least one of them exiting into the process chamber. A piston includes a first section having a first flow path, and a second section having a second flow path. A linear motion actuator is adapted to couple with the piston and controls linear movement of the piston through the bore between a first position and a second position. In the first position, the first section of the piston is aligned with the inlet such that fluid flows to the first outlet via the first flow path. In the second position, the second section of the piston is aligned with the inlet such that fluid flows to the second outlet via the second flow path.

Abstract: Male and female fittings are configured to mate to form a valved connector system. Some embodiments of the female fitting include movable poppet configured to sealingly engage a flared projection within the female fitting. Some embodiments of the male fitting include a male mating aperture, and a movable plug configured to sealingly engage the male mating aperture. When the female fitting is mated with a male fitting, the male fitting forces the poppet to disengage from the flared projection, and the flared projection forces the plug to recede into the male fitting, to open a fluid path through the valved connector system.

Abstract: An electronic device and a method are disclosed. The electronic device includes a sensor, a memory, a processor, and a communication interface. The sensor is configured to detected vibrations of a gas pressure regulator. The memory is configured to store the detected vibrations. The processor is configured to record the detected vibrations caused by the gas pressure regulator at a predetermined time interval. The processor is also configured to generate a report of the recorded vibrations caused by the gas pressure regulator to indicate the operational status of the gas pressure regulator, wherein the generated report includes at least two recorded vibrations. The communication interface configured to transmit the generated report.

Abstract: Examples are disclosed that relate to providing haptic feedback. One example provides a haptic feedback system comprising a wearable device configured to be worn by a user, the wearable device including a fluidic channel, a fluid disposed within the fluidic channel, the fluid including an adjustable viscosity, a circuit configured to vary a field within the fluidic channel, and a controller. The controller is configured to receive a first input, and in response to receiving the first input, apply a first field within the channel via the circuit to set the adjustable viscosity of the fluid to a first viscosity, and receive a second input, and in response to receiving the second input, apply a second field within the channel via the circuit to set the adjustable viscosity of the fluid to a second viscosity.

Abstract: A piston pump for feeding a liquid in a vehicle having at least one piston, which is configured to cyclically slide inside a housing between a top dead centre and a bottom dead centre. The liquid is usually fed along a main feeding direction from a suction duct to a delivery duct. The piston pump has two solenoid valves, which are each arranged in the suction duct and in the delivery duct, respectively, and are designed to be operated by an electronic control unit so as to reverse the liquid feeding direction from the main feeding direction to a secondary feeding direction opposite the main liquid feeding direction and/or so as to adjust the cylinder capacity of the piston pump. The piston is operated by an electromechanical actuator, in particular comprising an electromagnet.

Abstract: A system for providing fuel and oxidant to a rocket in flight, including a rocket having at least one internal tank for storing propellant, at least one external tank for holding a liquid rocket propellant, and at least one umbilical hose in fluidic communication with the at least one internal tank and the at least one external tank. The at least one umbilical hose is configured to automatically disengage from the rocket when the rocket reaches a predetermined state such as a predetermined altitude, for example. The at least one internal tank remains in fluidic communication with the at least one external tank while the at least one umbilical hose is engaged.

Abstract: The invention relates to a shaft passage and a valve having such a shaft passage, as well as a method for producing a shaft passage, in which the shaft (21) has at least one drive portion (24) to which a drive for controlling the shaft (21) can be connected and has a connecting portion (25) opposite the drive portion (24), to which an actuating member (64) can be connected, and an inner shaft portion (26) in the through-bore (22) extending at least partially in the through bore (22), and having an inner shaft seal (36) to which an operating pressure of a medium to be controlled by the actuating member (64) is applied, and having a fluid shaft seal (34) which extends in the direction of the drive portion (24), and which is arranged between the inner shaft seal (34) and the outer shaft seal (42), wherein the fluid shaft seal (34) is formed between the through bore (22) and the inner shaft portion (26) of the shaft (21) and is pressure-relieved against an operating pressure of the medium to be controlled.

Abstract: Provided is a turbine having a turbine regulating unit, a turbine protection unit, at least one safety block, quick-closing valves and regulating valves, wherein the quick-closing valves and the regulating valves can be actuated by associated switching and setting drives, wherein the at least one safety block is a pneumatic safety block, and in that at least one switching drive for direct or indirect actuation of a quick-closing valve is a pneumatic switching drive. The embodiment also relates to a method for retrofitting an existing turbine having a turbine protection unit, a turbine regulating unit, a hydraulic safety clock, quick-closing valves and regulating valves, wherein the quick-closing valves can be actuated directly or indirectly by associated hydraulic switching drives.

Abstract: A method for using a universal electronic toolset for indicating and adjusting of an implantable programmable bodily fluid drainage valve regardless of whether the valve includes a fixed reference magnet used to determine an angle of orientation of the implantable programmable bodily fluid drainage valve or not. A magnetic field detection sensor array in an indicator tool of the electronic toolset determines whether the fixed reference magnet is present in the implantable programmable bodily fluid drainage valve. If the presence of the fixed reference magnet is detected then the center and direction of flow of the adjustable valve unit is ascertained via electronic feedback from the electronic toolset; otherwise, the center and direction flow is ascertained via exclusively by manual physical palpation of the valve.

Abstract: In a flow path forming structure, axial runout of a shaft relative to a central axis generated when the shaft is inserted into the flow path is suppressed. This structure includes a flow path along which a fluid passes, and a shaft body that is inserted into the flow path. An upstream side of the shaft body and an inner circumferential surface of the flow path have a plurality of contact positions at different phases, and a downstream side of the shaft body and an inner circumferential surface of the flow path have a plurality of contact positions at different phases. The fluid flows through gaps between the shaft body and the inner circumferential surface. The contact positions on one of the upstream and downstream sides are at different phases from all of the contact positions on the other one of the upstream and downstream sides.

Abstract: A system for dissolving solid chemical may include three reservoirs positioned in a vertically stacked arrangement. A solid chemical reservoir configured to receive solid chemical to be dissolved may be nested in a solution generator reservoir into which water is introduced to erode the solid chemical. A dissolved chemical reservoir can be positioned under the solid chemical reservoir and the solution generator reservoir. The dissolved chemical reservoir can store solution generated using the system. In some examples, a recirculation circuit is used to recirculate water introduced into the solution generator reservoir until a solution having a target concentration of the chemical being dissolved is achieved. The recirculation circuit may include a recirculation line having an outlet aimed at the bottom wall of the solid chemical reservoir.

Abstract: A retractable home shower system enables a retractable shower assembly in which the shower head may be selectively extended from a shower wall by a user for use during bathing, and may be selectively retracted back into the shower wall upon completion of use by the user. Retractable home shower system may be generally comprised of a routing pipe, an escutcheon plate shower arm, a shower head, a flexible shower hose, and a counter weight. Routing pipe, flexible shower hose and counter weight may be concealed in the interior space behind a shower wall in a shower.