Abstract: Method for measuring an amount of cementitious material in a concrete mixing truck using a resonant electroacoustic transducer by rotating the mixing drum so that a radiating surface of the electroacoustic transducer submerges in and then emerges from the cementitious material while measuring with an electronic circuit the driving point impedance magnitude of the resonant frequency fr and antiresonant frequency fa, and calculating the activity of the electroacoustic transducer a plurality of times as the mixing drum rotates. The calculated activities and the corresponding rotational angles, time values or both are used to determine a volume of cementitious material in the concrete mixing truck.

Abstract: A solid bowl screw centrifuge has a rotatable drum, a screw arranged in the drum and rotatable relative to the rotatable drum with a differential speed, one or more drum bearings for bearing the drum, a sealing assembly arranged between a drum shaft portion and the housing for protecting at least one of the drum bearings from an ingress of constituents of a suspension. Each sealing assembly includes at least two radial shaft sealing rings arranged with a mutual axial spacing so as to form at least one chamber. Respective radial shaft sealing rings are arranged such that their respective sealing lips are directed away from the respective chamber. A gas source having a gas pressure can impinge on the respective chamber.

Abstract: A disk-pack turbine includes two disks each having a waveform surface and a second surface, the waveform surfaces face each other and have an axially centered waveform pattern, at least one disk includes an axially centered opening passing from the second surface to the waveform surface, said disks define an expansion chamber including the at least one opening and a disk chamber between said disks from the expansion chamber to a periphery of said disks. The waveform pattern includes at least one waveform that has an amplitude that varies in a radial direction and said waveform pattern maintains or increases a number of peaks for each level of waveforms progressing out from the inner most waveform about said axial center to said periphery where the increase is by a multiplier of 2 to 8. The second surfaces have a slight parabolic shape or are flat.

Abstract: A magnetic stir bar is described that includes a first portion with an outer perimeter that has a shape in plan view and a center point being a geometric center of the shape. The magnetic stir bar includes a second portion with a magnet that is connected to the first portion. The second portion is arranged so that at least part of the second portion is positioned within the outer perimeter of the first portion and so that a magnetic center point of the magnet in plan view is positioned off-center with respect to the center point of the outer perimeter. A method of mixing a fluid includes providing the fluid in a mixing container with the magnetic stir bar and rotating the magnetic stir bar with a magnetic stirrer.

Abstract: A disk-pack turbine for use, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid through a vortex chamber into an expansion chamber and then through at least a portion of a waveform pattern present between at least two rotors and/or disks. The rotors and/or disks having waveform patterns on at least one side. In at least one embodiment, the waveform patterns include a plurality of hyperbolic waveforms axially aligned around a horizontal center of the system.

Abstract: A hydraulic vibration generation device or hydraulic motor is provided. The device includes a manifold having an inner volume with a pressure chamber formed in the inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a grooved drive and an off-center weight and retaining plates. The inner volume receives the vibration generating member within it. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold through the inlet orifice and directed through the pressure chamber, relieves pressure upon exiting the pressure chamber into a pressure relief channel and out of the manifold through the outlet orifice. Also provided a hydraulic motor with a same manifold and pressure chamber, but with a power generating member having the same groove drive without an off-center weight. Rotation of the power generating member generates power.

Abstract: A screw for an extruder or conveyor is disclosed. The screw includes a helical web extending around a core, where at least a portion of an active conveying flank of the web is formed with an undercut in the conveying direction. The screw may function as a conveying or dosing screw for processing polymer materials.

Abstract: A system for a concrete mixer having a drum receiving fresh concrete therein. The system generally has: a sensor measuring a set of measurand values indicative of a measurand associated with at least one of the fresh concrete, the drum and components of the concrete mixer; and a controller communicatively coupled to the sensor, the controller performing the steps of: accessing the set of measurand values generated by the sensor; using a trained data processing engine stored on the non-transitory memory, at least one of determining a property value indicative of a property of the fresh concrete, determining a parameter value indicative of a parameter of the drum, and determining that the set of measurand values are indicative of some operating conditions of the concrete mixer; and outputting a signal based on said determining.

Abstract: A control system for a centrifuge is disclosed, that comprises: a controller that receives a first pressure signal indicative of a first pressure of a product flowing into or out of the centrifuge, and a second pressure signal indicative of a second pressure of an operating fluid flowing into or out of the centrifuge. The controller is configured to: determine a first pressure difference between the first pressure and the second pressure; an in response to the first pressure difference dropping below a first predetermined offset, output a first control signal that causes a back pressure of the product flowing out of the centrifuge to increase.

Abstract: An eductor for mixing a diluent with a chemical. The educator includes an eductor body having a nozzle section with an inlet portion and an air gap portion, the inlet portion configured to couple to a diluent source and the air gap portion open to the atmosphere, and a venturi section coupled to the nozzle section. The nozzle section and venturi section may be connected by a swivel joint. The venturi section includes a venturi configured to couple to a chemical source for drawing chemical into the venturi with the flow of diluent through the venturi. A nozzle assembly positioned in the nozzle section of the eductor body. The nozzle assembly is selected from a plurality of nozzle assemblies each configured to be positioned in the nozzle section and operable with the eductor body, and each corresponding to a different volume flow rate through the eductor.

Abstract: A mixer vehicle system includes a mixer vehicle and a remote management system. The mixer vehicle includes a chassis and a vehicle body. The vehicle body comprises a plurality of subcomponents. The plurality of subcomponents includes a cabin, a mixing drum, a charge hopper, and a chute. The mixing drum is movable relative to the chassis to agitate a mixture. The charge hopper is movable relative to an aperture of the mixing drum. The chute is pivotally coupled to the mixer vehicle. The remote management system is configured to monitor and adjust a property of the mixture. The remote management system includes a sensor and a device. The sensor is configured to detect information corresponding to the property of the mixture and generate an input signal. The device is configured to recover a signal from the remote quality management system and cause at least one mixture property to change.

Abstract: A method for automatic cell centrifugal cleaning and medium replacement includes: obtaining a cell volume and a critical value of a centrifugal device after centrifugal stabilization of the centrifugal device; and performing, according to a magnitude relationship between the cell volume and the critical value of the centrifugal device, a velocity reduction process on a centrifugal chamber by combining the cell volume and the centrifugal chamber information. The extracted volume is changed by velocity-reduced rotation, and the rotation at a reduced velocity is adjusted according to the magnitude relationship between the cell volume and the critical value of the centrifugal device. The optimal cleaning and medium replacement effect on cells of different volumes can be realized. A high capture rate and a high medium replacement rate are obtained and maximized from different volumes of cell samples in the fixed parameters of the centrifugal chamber.

Abstract: A separator includes a drum ejection passage control element and an intermediate ejection control element both mounted on a drum assembly. The drum ejection passage control element is moveable between a first position and a second position. In the second position a drum ejection passage is open for ejection of material from a maximum diameter of a separator volume, while in the first position the drum ejection passage control element blocks the drum ejection passage to prevent the ejection of material from the maximum diameter of the separator volume. An intermediate ejection path is formed in the separator, each extending from an intermediate ejection path inlet at an intermediate region of the separator volume to an intermediate ejection path outlet. The intermediate ejection control element is moveable to alternately open or close the intermediate ejection path for fluid communication to the separator volume.

Abstract: An automated apparatus suitable for the preparation of genetically transformed cells from biological fluids including of an operating unit and a rotating concentric hollow processing chamber able to automatically process biological samples, such as white blood cells from apheresis, bone marrow or cultured cells, to manufacture genetically engineered cells. The operating unit is rotatable around its center about a horizontal axis and the processing chamber is rotatable about its central rotor axis perpendicular with the rotating axis of the operating unit. The processing chamber can be operated at high rotating speeds when oriented vertically to generate centrifugal force on the contained sample allowing separation of solids from liquids and at low speeds or by series of fast sequential clockwise and counterclockwise rotations when oriented horizontally for incubation, solid resuspension and magnetic beads magnetic attachment.

Abstract: A reactor for coating particles includes a stationary vacuum chamber that has a lower portion that forms a half-cylinder and an upper portion and that holds a bed of particles to be coated, a vacuum port in the upper portion of the chamber, a paddle assembly, and a gas injection assembly that includes a vaporizer to convert a first liquid to a first reactant or precursor gas, a manifold to receive the first reactant or precursor gas from the vaporizer, and a plurality of channels leading from the manifold to a plurality of apertures located in the lower portion of the chamber.

Abstract: A sample crusher, including a main body housing and an electric motor arranged in the main body housing. A swing mechanism is further arranged in the main body housing. The swing mechanism includes a transmission shaft, a swing disk for allowing a grinding tube to be placed thereon, and a circumferential limiting component. The transmission shaft is driven by the electric motor to rotate, an obliquely arranged bearing is sleeved on the transmission shaft, an included angle is formed between an axis of the bearing and an axis of the transmission shaft, the swing disk is mounted on the bearing, the swing disk and the bearing are concentrically arranged, and the swing disk is connected to the circumferential limiting component.

Abstract: Devices and methods of processing a sample that includes rotating one or more microfluidic chips that are mounted on a support plate. Each microfluidic chip can be rotated 180° on the support plate so that the sample can be run bidirectionally through each of the microfluidic chips. Each of the microfluidic chips can include a fluid path comprising a plurality of expansion and compression regions that increase in radius in more than two dimensions. The support plate may be configured to reversibly interact with one or more carriage assemblies, which may be operatively coupled to the support plate.

Abstract: A fluid mixing assembly (100) comprising a body (102) having a discharge outlet (114) for discharging fluid; a fluid mixing device (104) disposed in the body (102) and in fluid communication with the discharge outlet (114), the fluid mixing device (104) having an adjusting member (122) adjustable about a mixing adjusting axis (124) and configured to assist in controlling mixing of fluids in the fluid mixing device (104); a first isolator (132) in fluid communication with the fluid mixing device (104) and configured to be coupled in fluid communication to a first source of fluid, the first isolator (132) having an adjusting member (140) adjustable about a first isolator adjusting axis (138) and configured to control a flow of fluid through the first isolator (132); and a second isolator (144) in fluid communication with the fluid mixing device (104) and configured to be coupled in fluid communication to a second source of fluid, the second isolator (144) having an adjusting member (152) adjustable about a seco

Abstract: A scraping unit for a stand mixer includes: an upper ring; and a plurality of fingers extending downwardly from the upper ring, the fingers having a curvilinear profile selected to confront an inner surface of a bowl of a stand mixer. The scraping unit may be employed in combination with the bowl of a stand mixer to enable the user to redirect foodstuff that has collected out of range of the beaters of the stand mixer back into the range of the beaters.

Abstract: A medical device for mixing a medicament contained within a medicament vial, wherein the medical device comprises a track configured to support the medicament vial, and wherein the track comprises an inclined first track section arranged such that, in use, the medicament vial can roll along the track to mix the medicament contained within the medicament vial. A system comprising the medical device and a medicament vial containing the medicament. A method for using the medical device.