110results about "Contracting/expanding measuring chambers" patented technology

The invention relates to a dosing system (1) for dosing a dosing material. The dosing system (1) has a housing (11), comprising a nozzle (70) and a supply channel (62) for dosing material, and a discharge element (80) movably mounted in the housing (11) and an actuator unit (10) coupled to the discharge element. The actuator unit (10) comprises an actuator (12) having a membrane (13) which can be pressurized by means of a pressure medium in order to move the discharge element (80) in a discharge direction (RA). The discharge element (80) is formed separately and, for coupling to the actuator unit (10), is pressed by means of a force acting on the discharge element (80) against a side surface (19) of the membrane (13) pointing in the direction of the discharge element (80). Furthermore, the invention relates to a method for controlling a dosing system (1).

A system for at least partial closed-loop control of a medical condition is disclosed. The system includes at least one medical fluid pump. The medical fluid pump including a sensor for determining the volume of fluid pumped by the pump. Also, at least one continuous analyte monitor, and a controller. The controller is in communication with the medical fluid pump and the at least one continuous analyte monitor. The controller includes a processor. The processor includes instructions for delivery of medical fluid based at least on data received from the at least one continuous analyte monitor.

Metering device (100) for a liquid medium, comprising: a first metering unit (10) having a first material chamber (12), a first material outlet (14) and a first metering piston (16) slidably arranged in the first material chamber (12) for ejecting the medium from the first material chamber (12); a second metering unit (20) having a second material chamber (22), a second material outlet (24) and a second metering piston (26) slidably arranged in the second material chamber (22) for ejecting the medium from the second material chamber (22); and a common material outlet (30) of the first and second metering units (10, 20). A gearbox (42) couples the first metering piston (16) and the second metering piston (26) to the drive motor (40).The two material chambers (12, 22) each with a piston (16, 26) can be operated alternately to eject material by a single drive motor (40) which drives the pistons in opposite directions, wherein the two material chambers (12, 22) can be connected to the common material outlet (30).

A system includes a flow sensor contained within a flow sensor housing, a base, and a seal. The base houses a controller that generates at least one operation modification signal, and the flow sensor is separable from and mountable onto the base. A bottom surface of the flow sensor housing includes the seal. The seal forms a liquid-tight engagement between the flow sensor housing and the base when the flow sensor is mounted onto the base.

The invention is directed to a process water analyzer (10) for automatically analyzing a parameter of a water sample, comprising a process liquid reservoir tank (70,72) with a process liquid (70',72'), whereas the process liquid reservoir volume (V70,V72) in the reservoir tank (70,72) defines a reservoir liquid level (170,172) at a reservoir liquid level height (h70, h72), a dosage chamber (30) fluidically connected to the process liquid reservoir tank (70,72) and being positioned fluidically downstream of the process liquid reservoir tank (70,72), and a positive displacement dosage pump (20) fluidically connected to the top of the dosage chamber (30) for sucking in the process liquid (70', 72') into the dosage chamber (30), whereas an air cushion (27) is always provided vertically between the dosage pump (20) and a dosage chamber liquid level (I) in the dosage chamber (30), so that a liquid column (Ic70, Ic72) with an effective vertical liquid column length (c70,c72) is given between the reservoir liquid level (170,172) and the dosage chamber liquid level (I), whereas the dosage pump (20) directly sucks a pressure-adapted gas volume (Vgas) of the air cushion (27) having an air cushion pressure (P) so that a set process liquid volume (Vliquid) is pumped into the dosage chamber (30), and whereas a process liquid dosage control unit (200) is provided, the process liquid dosage control unit (200) providing the value of the pressure-adapted pumped gas volume (Vgas) dependent on the air cushion pressure (P) effected by the effective vertical liquid column length (c70,c72).

A wearable infusion pump assembly includes a reservoir for receiving an infusible fluid, and an external infusion set configured to deliver the infusible fluid to a user. A fluid delivery system is configured to deliver the infusible fluid from the reservoir to the external infusion set. The fluid delivery system includes a volume sensor assembly, and a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the volume sensor assembly. The volume sensor assembly is configured to determine the volume of at least a portion of the quantity of fluid. The fluid delivery system further includes a first valve assembly configured to selectively isolate the pump assembly from the reservoir, and a second valve assembly configured to selectively isolate the volume sensor assembly from the external infusion set.

The utility model discloses a precise flow generation mechanism, and belongs to the technical field of flow generation devices.The precise flow generation mechanism drives a lead screw shaft to do precise linear motion through a driving device, the motion of the lead screw shaft further pushes a piston to do reciprocating motion in a cylinder barrel, suction and exhaust of gas are achieved, and in order to precisely measure the flow of the gas, the precision of the flow generation mechanism is improved. The device is provided with the distance measuring mechanism, the distance measuring mechanism is used for measuring displacement data of the lead screw shaft, on this basis, the displacement amount of the piston can be accurately calculated in combination with the known diameter of the cylinder barrel, so that the volume of sucked and exhausted gas is determined, and finally, the flow of the gas can be accurately obtained through real-time monitoring and calculation; by means of the design, the precision of flow measurement is improved, and the stability and reliability are ensured through the optimized mechanical structure.

Accurately manage the actual transmission speed and transmission volume. [Solution] A method for managing the discharge of a cement composition using a pump truck equipped with a cylinder and piston for dispensing the cement composition, wherein the reciprocating motion of the piston in the cylinder is detected by a sensor, and the discharge speed or discharge amount of the cement composition actually discharged from the pump truck is determined based on the detection result of the sensor, the capacity of the cylinder, and a correction value corresponding to the slump of the cement composition.

A fluid dispenser with a fluid pump for dispensing fluid on movement of an actuator, and an air pump for delivering a stream of air through at least one sound generator on movement of the actuator. The sound generator produces at least two sounds as the actuator is moved from a first position to a second position, with each sound produced in a different time period during a cycle of operation, or differing from the other sound in respect of one or more detectable sound characteristics, such as duration, frequency, temporal alignment, amplitude, and / or timbre. The time period of each sound is a function of the relative location of the actuator between the first and second positions.

A dosing piston for a dosing pump has a generally cylindrical piston body extending along an axis. A flexible seal body is fitted to but separate from the piston body, forms part of an outer surface of the piston body, and forms with the piston body an annular compartment. A seal ring is formed on and projects radially outward from the seal body, and an elastic biasing element in the annular compartment bears radially inward on the piston body and radially outward on the seal body at the seal ring.

A multi-dose metering device (1) comprising a metering block (2) with at least one inlet for a main conveying medium, with at least two component inlets and at least two dispensing lines (4), wherein each dispensing line (4) is assigned a component inlet and a metering pump (8) is connected upstream of each component inlet, wherein each metering pump (8) is connected directly to the metering block (2) as a detachable module, characterized in that the dispensing lines (4) each have a metering agent connection (28) which is designed as part of a quick coupling which interacts with a coupling part (29) of a pressure line (16) of a metering pump (8) designed to complement this, and that the metering agent connection (28) comprises at least one shut-off valve (28a) which automatically closes the metering agent connection (28) when no metering pump (8) is connected.

A pipette 10 for aspirating and / or dispensing liquids comprising a pipette tip 100 and a plunger 200. The pipette tip has a proximal end 101 and a distal end 102 defining a longitudinal axis 1 therebe

The invention relates to a device for dispensing a fluid product, the device comprising a metering valve mounted on a reservoir (1) containing at least one active ingredient suspended in a pressurised propellant gas, the liquid density at 21°C of which is less than or equal to 1.20 g / cm3, the valve comprising a valve body (10) containing a metering chamber (20) and a valve element (30) that slides axially in the valve body (10) between a rest position and a dispensing position in order to dispense the contents of the metering chamber (20), the metering chamber (20) being, when the valve element (30) is in the rest position, connected to the reservoir (1) to allow the metering chamber (20) to be filled under the effect of gravity when, when the valve element (30) is in the rest position, the valve is in an inverted position with the metering chamber (20) arranged below the reservoir, and to allow the metering chamber (20) to be emptied under the effect of gravity when, when the valve element (30) is in the rest position, the valve is in an upright position with the metering chamber (20) arranged above the reservoir, the valve body (10) comprising at least one fluid passage opening (11) that defines a passage area S1 connecting the reservoir (1) to the inside of the valve body (10), the passage area S1 being greater than or equal to 20 mm2 and less than or equal to 100 mm2.

This invention provides a gas meter metering method and system. The gas meter metering method includes: recording the full-cycle sampling time in the conventional sampling mode of a diaphragm gas meter; adjusting the sampling mode according to the relationship between the full-cycle sampling time and a preset sampling cycle threshold; and calculating the real-time gas flow rate using the adjusted sampling mode. By setting a preset sampling cycle threshold, the sampling mode is rationally switched according to the relationship between the current full-cycle sampling time and the preset sampling cycle threshold, making the adjusted sampling mode more suitable for the current application scenario, meeting the real-time data reading requirements, improving data reading efficiency, and thus achieving real-time monitoring of gas flow rate.

The invention provides a substance dispenser for dispensing a metered amount of a substance such as a cream or gel, other viscous or non-viscous substance, the dispenser comprising: a first housing member defining a handle for the dispenser; a cream containing chamber arranged to slide telescopically with respect to the handle member, the cream containing chamber having a nozzle opening at a first end, from which cream is, in use, dispensed; a bearing at the second axial end; and a shaft rotatably fixed with respect to the handle and arranged to pass through the bearing such that upon rotation of the handle with respect to the cream containing chamber, the cream containing chamber and the handle move telescopically with respect to each other such that, the substance containing chamber moves axially within the handle to force cream through the nozzle opening, wherein movement of the handle with respect to the cream containing chamber is indexed so as to dispense a predetermined volume of cream in dependence on a rotation thereof.

Oscillating Piston Liquid Meter Chamber and Meter Comprising Such a Chamber The invention relates to a measuring chamber (1) of an oscillating piston (3) liquid meter, which comprises a cylindrical side wall (4), a bottom, a cover and a partition extending radially inwards from the cylindrical side wall (4) and the piston (3) comprising a cylindrical body (8) traversed by a flat wall (9) forming a discoidal sail in one piece with it, this flat wall (9) being provided with through openings (10, 10'), chamber (1) characterized in that the through openings (10) of a first population of through openings (10, 10') of the discoidal sail (9) are distributed according to a staggered arrangement which is diverging towards the wall (8') of the cylindrical body (8) and which is provided by an elementary pattern (ME) repeated around the central axis of the piston (3),and in that the mutually adjacent through openings (10) of this first population are spaced at least a minimum distance apart. Figure to be published with the abbreviation: Fig. 7,

The present invention relates to a system (10) for atomizing and ejecting a liquid (L) for a transdermal delivery. The system (10) comprises: a tank (100) for holding the liquid (L); a Venturi tube (200) comprising a longitudinal central axis (X1) and an internal passage (210) extending along the axis (X1), wherein the internal passage (210) is fluidly connected to the tank (100) via an orifice (220) defined in the Venturi tube (200), wherein the internal passage (210) comprises a converging section (230), a diverging section (240) and a throat section (250) located between the converging and diverging sections (230, 240); a cylinder (300) comprising a longitudinal central axis (X2), an end wall (310) orthogonal to the axis (X2), a circumferential wall (320) extending from the end wall (310) along the axis (X2) and an outlet hole (330) formed on the end wall (310), wherein the outlet hole (330) is fluidly connected to an inlet (232) of the converging section (230); a piston (400) arranged in the cylinder (300) so as to be displaceable in the cylinder (300) along the axis (X2), wherein the piston (400) defines an air intake space (V) in the cylinder (300) in cooperation therewith, wherein the air intake space (V) fluidly communicates with the inlet (232) of the converging section (230) via the outlet hole (330); a driving unit (500) for displacing the piston (400) in a direction in which a volume of the air intake space (V) increases; and an elastic member (600) that is deformed according to the displacement of the piston (400) and stores an elastic energy therein while the piston (400) is being displaced in the direction in which the volume of the air intake space (V) increases. The driving unit (500) comprises an elastic energy release mechanism (M) that releases the elastic energy stored in the elastic member (600), thereby causing the piston (400) to rush in a direction in which the volume of the air intake space (V) decreases.

A fill adapter system for an infusion pump assembly. The system includes a reusable fill adapter base, the base including a volume control mechanism to adjust an available fill volume of a reservoir of the infusion pump assembly and a pump mechanism configured to pump air into a fluid vial. The system also includes a vial adapter assembly including a first needle configured to penetrate a septum of the fluid vial for fluidly coupling the pump mechanism to the fluid vial and a second needle having a first end configured to penetrate the septum of the fluid vial and a second end configured to penetrate a septum of the reservoir of the infusion pump assembly to allow transfer of fluid from the fluid vial to the reservoir of the infusion pump assembly in response to air being pumped into the fluid vial and a needle carriage adapted to carry the first needle and the second needle, wherein the needle carriage slidably attached to the interior of the vial adapter assembly, wherein the needle carriage adapted to slide from a vial end of the vial adapter to a receptacle end of the vial adapter.

Disclosed mechanical stimulator systems can maintain the sterility of biological samples within a multi-well plate while mechanically stimulating the samples. The systems disclosed herein allow for the individual activation by mechanical compression of a high number of samples at the same time, while maintaining sterility of the samples. The well plates, guides, actuations pistons, and other components of the disclosed systems can be configured to be contained in or adjacent to an incubator that can control properties such as gas levels and temperature while at the same time allowing for the mechanical actuation of the biological samples.

The invention is directed to a process water analyzer (10) for automatically analyzing a parameter of a water sample, comprising a process liquid reservoir tank (70,72) with a process liquid (70',72'), whereas the process liquid reservoir volume (V70,V72) in the reservoir tank (70,72) defines a reservoir liquid level (170,172) at a reservoir liquid level height (h70, h72), a dosage chamber (30) fluidically connected to the process liquid reservoir tank (70,72) and being positioned fluidically downstream of the process liquid reservoir tank (70,72), a positive displacement dosage pump (20) fluidically connected to the top of the dosage chamber (30) for sucking the process liquid (70', 72') into the dosage chamber (30), whereas an air cushion (27) is always provided vertically between the dosage pump (20) and a liquid column upper level (I) of a process liquid column (lc70,lc72) with an effective vertical liquid column length (c70,c72) between the reservoir liquid level (170,172) and the liquid column upper level (I), a gas pressure sensor (60) sensing the gas pressure (P) of the air cushion (27), and a liquid reservoir volume control unit (100) calculating the actual process liquid reservoir volume (V70,V72) on the basis of the gas pressure (P) provided by the gas pressure sensor (60) and the known vertical height (h) of the liquid column upper level (I). This arrangement makes a liquid level sensor for the process liquid reservoir tank(s) redundant.

This application relates to the field of water meter metering technology, and more particularly to a sloped sealed metering chamber, mainly comprising an upper metering chamber and a lower metering chamber. The upper metering chamber has an outlet at its top, and the lower metering chamber has an inlet at its bottom. The lower end face of the upper metering chamber and the upper end face of the lower metering chamber are mutually adapted inclined slopes. When they are fitted together, the interior of the upper and lower metering chambers forms a piston rotation cavity, and the outer periphery of the upper and lower metering chambers forms an annular sealing groove. This invention, by employing inclined surface geometry and utilizing the "wedge effect" of the slope, converts externally applied axial pressure into radial clamping force, giving the sealing structure better self-compensation capability. When the cavity undergoes micro-deformation due to temperature fluctuations or water pressure impacts, or when the sealing surface wears due to long-term use, the inclined surface structure will automatically adjust its position under pressure.

Provided is a particulate matter filling method for measuring the volume of particulate matter and filling the particulate matter into a container, the method being able to further improve the performance of a facility while maintaining high quality measurement accuracy without involving increase in size of the entirety of the facility. This method comprises: a first step for having a feeding section, a first measuring section and a first filling section disposed in the stated order at one side of the feeding section, and a second measuring section and a second filling section disposed in the stated order at the other side of the feeding section, and for moving a first particulate matter fed through the feeding section to the first measuring section; a second step for moving a second particulate matter fed through the feeding section to the second measuring section and measuring the first particulate matter; a third step for moving the first particulate matter to the first filling section and measuring the second particulate matter; a fourth step for filling the first particulate matter, and then moving the second particulate matter to the second filling section; and a fifth step for filling the second particulate matter.

The utility model relates to a continuous measurement reciprocating type piston flowmeter, which comprises a bottom plate, a piston rod and a piston rod, the cylinder bodies are fixed on the bottom plate; piston rods of the cylinders are sealed with the corresponding cylinder bodies through spring plugs; the flow collecting block is fixed on the bottom plate and is arranged at the bottom of the cylinder body; the filling main flow channel is formed in the flow collecting block; one end of each filling branch flow channel is connected with the corresponding cylinder body, and the other end of each filling branch flow channel is connected with the filling main flow channel through the control flow channel; the output main flow channel is formed in the flow collecting block; the output branch runners are formed in the flow collecting blocks, one ends of the output branch runners are connected with the corresponding cylinder bodies, and the other ends of the output branch runners are connected with the output main runner through control runners; the stop valves are arranged at the control flow channels; the device is not affected by medium viscosity and particles, and compared with a rotary piston flowmeter, the device is simple in structure in the mode that a piston is pushed by an air cylinder to fill or output media; the design of the double piston cylinders can be used for continuous measurement and effectively relieving pressure pulsation.

To provide a dosing system for administering a dosing material.SOLUTION: A dosing system includes: a housing comprising a nozzle and a feed passage for administering a material; a discharge element which is movably attached to an interior of the housing; and an actuator unit which is coupled to the discharge element. The actuator unit comprises an actuator having a film which can be pressurized by a pressure medium in order to move the discharge element in a discharge direction. The discharge element is separately formed, and is pressed against a side face facing toward a direction of the discharge element by a force acting on the discharge element in order to couple to the actuator unit. Further, the present invention relates a method for controlling the dosing system.SELECTED DRAWING: Figure 1

The invention relates to the technical field of flow meters, in particular to a gear flow meter which comprises a flow meter shell, a first gear and a second gear. The flow meter further comprises an automatic opening mechanism and a telescopic mechanism, an auxiliary flow branch is arranged in the flow meter shell, the two ends of the auxiliary flow branch are communicated with the liquid inlet and the liquid outlet respectively, the automatic opening mechanism is located between the liquid inlet and the auxiliary flow branch, and a partition plate used for separating the metering space and the auxiliary flow branch is connected into the flow meter shell in a sealed mode. One side of the partition plate is connected with the first gear or the second gear, and the other side of the partition plate is connected with the output end of the telescopic mechanism. By arranging the auxiliary flow branch and the automatic opening mechanism, when impurities enter the flow meter to block the flow meter, liquid flows into downstream equipment through the auxiliary flow branch, and the downstream equipment can still work normally; and by arranging the telescopic mechanism, the first gear and the second gear are separated for washing after impurities enter, so that the gear flow meter can recover to work again.

Provided is a particulate matter filling method for measuring the volume of particulate matter and filling the particulate matter into a container, the method being able to improve the performance of a facility while maintaining high quality measurement accuracy. This method includes: moving a first particulate matter fed through a feeding section to a first measuring section; moving a second particulate matter fed through the feeding section to a second measuring section and measuring the first particulate matter; moving the first particulate matter to a first filling section and measuring the second particulate matter; filling the first particulate matter, and then moving the second particulate matter to a second filling section; and filling the second particulate matter.

The invention relates to a metering system (1) for metering a metering material. The metering system (1) comprises a housing (11), having a nozzle (70) and a supply channel (62) for metering material, and a discharge element (80) moveably mounted in the housing (11), as well as an actuator unit (10) coupled to the discharge element. The actuator unit (10) comprises an actuator (12) having a membrane (13) which can be applied with a pressure medium in order to move the discharge element (80) in a discharge direction (RA). The discharge element (80) is designed to be separate and is pressed against a lateral surface (19) of the membrane (13) pointing in the direction of the discharge element (80) by means of a force acting on the discharge element (80) for the purpose of coupling to the actuator unit. The invention also relates to a method for controlling a metering system (1).