192results about "Contracting/expanding measuring chambers" patented technology

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.

An injection device includes a cartridge configured to hold a volume of fluid, the cartridge having a proximal end and a distal end through which the fluid is dispensed; a stopper disposed in the cartridge and configured to move from the proximal end toward the distal end to cause the fluid to be dispensed through the distal end of the cartridge; and an electronic device disposed at the distal end of the cartridge, the electronic device including an emitter configured to transmit a signal toward the stopper, a receiver configured to receive reflections of the signal from the stopper, and a controller configured to wirelessly transmit data related to a position of the stopper in the cartridge.

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.

Described herein is a machine (100) for forming doughs for oven-baked products, of the type comprising a forming roller (20) provided with mobile pistons (24) for providing first and second forming cavities (C1, C2), a first hopper (40) for feeding a first dough to the forming roller (20), a second hopper (60) for feeding a second dough to the forming roller (20), and a conveyor belt (80) for feeding the semi-finished products formed in the forming roller (20) to a subsequent station. The machine (100) further comprises a knife (52) associated to the first hopper (40) and a knife (54) associated to the second hopper (60).

Tinting machine (1) for metering, dispensing and mixing tinting pastes to prepare a paint of a desired colour or quality. The tinting machine comprises a plurality of dispense units (8), each dispense unit comprising a container (4) for holding a tinting paste and a pump (9). The dispense units are selectively movable to a dispense position. The tinting machine further comprises an actuator (20) engaging a selected one of the dispense units when it is in the dispense position. The actuator comprises a main gripper (40) for engaging the pump for fast dispensing, and a secondary gripper (50) for engaging the pump for accurate dispensing.

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 testing assembly for testing an operation of a medicament delivery device, the testing assembly comprising: a base plate; wherein a first cavity is arranged in the base plate; a support plate; wherein a second cavity is arranged in the support plate lined up with the first cavity along a longitudinal axis such that a channel extending along the longitudinal axis is formed by the first cavity and the second cavity; a pierceable barrier extending across the channel in the direction transverse to the longitudinal axis such that at least one of the first cavity and the second cavity is sealed by the pierceable barrier; and wherein the support plate comprises a support surface facing away from the pierceable barrier.

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 present invention relates to a cap assembly configured to be attached to a container, the cap assembly comprising: a top cap which includes a rest position and a pressable position; a piston rod connected to the top cap, the piston rod being connected to a piston at the bottom to actuate the piston to move vertically, the piston rod further comprising an inclined upper guiding surface; a deformable element bearing at the top end against the upper guiding surface of the piston rod so that the deformable element is movable along the upper guiding surface; a support which is vertically movable to move the top cap from the rest position to the pressable position, the support including an inclined lower guiding surface against which the bottom end of the deformable element is supported so that the deformable element is movable along the lower guiding surface; when the top cap is pressed, the piston rod moves downwards and actuates the piston to move downwards to dispense material from a dispensing chamber while forcing the deformable element to deform from an initial state and to move along the upper guiding surface and the lower guiding surface; and when the top cap is released, the deformable element returns to the initial state.

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.

The present invention discloses a diaphragm gas meter anti-reverse rotation structure, comprising a pointer dial and two rocker-link mechanisms for driving the pointer dial to rotate. Each rocker-link mechanism comprises a connecting rod and a rocker arm, wherein the connecting rod's ends are hinged to the pointer dial and the rocker arm, respectively. The rocker arm has a vertical shaft sleeve at one end away from the pointer dial. The pointer dial has an arc-shaped protrusion structure arranged concentrically therewith. The arc-shaped protrusion structure has a climbing angle α in the direction opposite to the metering rotation direction of the pointer dial, and the upper edge of the high end of the arc-shaped protrusion structure has a protruding angle. The lower of the two connecting rods is provided with a stop portion on the side near the protruding angle. The stop portion is wedge-shaped and located within the reverse rotation travel of the protruding angle. This application optimizes the design of existing components in the movement to achieve self-locking of the pointer dial and the connecting rod during reverse rotation, thereby improving the reliability of the anti-reverse structure and ensuring the product yield. It also helps reduce overall processing costs, processing difficulty, and assembly difficulty, facilitating implementation and promotion.

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 utility model discloses a diaphragm gas meter transmission structure which comprises a metering shell and a valve gate installed on the metering shell, a valve deck is installed above the valve gate, a door-shaped support is installed on the valve gate, a side frame of the door-shaped support is fixed to the valve gate, a transverse frame of the door-shaped support is located above the valve deck, and the transverse frame of the door-shaped support is located above the valve deck. A driving lever gear, a third wheel and a crank gear are installed on the door-shaped support, the third wheel is installed on the transverse frame through a supporting shaft, the driving lever gear is meshed with the third wheel, a connecting shaft is installed in a center hole of the valve cover, the upper portion of the connecting shaft extends out of the center hole, the extending end of the connecting shaft is fixedly sleeved with the crank gear, and the crank gear is meshed with the third wheel. According to the gas meter, the installation mode of the support is adopted, the installation accumulated error is reduced, the sealing performance of the gas meter is greatly improved, and meanwhile the metering precision is improved.

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.