249results 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.

A method and system for dispensing metered shots of cannabis-containing or hemp-containing concentrate into a receiving vessel. The method comprises the steps of (a) providing a control module that includes a touch screen; (b) communicating the control module with an endless piston pump or progressive cavity pump; (c) deploying a disposable plastic tube and plunger to dispense bulk concentrate into the pump; (d) positioning an empty receiving vessel into a position in relation to the dispenser using a conveyor, or a turntable, or by manually placing the receiving vessel into position; (e) dispensing a metered shot of the concentrate into the empty receiving vessel to prepare a filled vessel; and (f) re-positioning the filled vessel in registration with the conveyor or turntable so that the dispenser becomes engaged with a subsequent empty receiving vessel.

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 discloses a flow detection method, a fluid pump and groove type semiconductor cleaning equipment, the flow detection method is applied to the fluid pump, and the fluid pump comprises a pump shell, two variable-volume cavities and a valve device, and the two variable-volume cavities and the valve device are arranged in the pump shell; the pump shell is provided with an outlet and an inlet. The two variable volume chambers are communicated with the outlet and the inlet through valve devices; the volumes of the two variable-volume cavities are alternately changed, the volume of one variable-volume cavity is increased so that fluid enters through the inlet, and the volume of the other variable-volume cavity is decreased so that the fluid contained in the variable-volume cavity can be discharged through the outlet; the flow detection method comprises the following steps: detecting the duration of the two variable-volume chambers experiencing one-time volume change; and calculating the flow of the fluid according to the volume of the variable-volume chamber filled with the fluid and the duration of one-time volume change. According to the scheme, the problem that the ultrasonic flowmeter cannot detect the flow due to the fact that more bubbles are generated in the preparation process of the cleaning liquid of the semiconductor cleaning process in the background technology can be solved.

The invention discloses a piston flow meter suitable for a fuel oiling machine, and belongs to the technical field of measuring instruments, the piston flow meter comprises a main body, a bottom cover is fixedly installed at the bottom of the main body through cooperation of a bolt and a nut, and the bottom cover is used for sealing the bottom of the main body. Bubbles in fuel oil can be broken through vibration when the elastic piece vibrates, the bubbles in the fuel oil can be eliminated through the bubble removing assembly when the oiling machine adds the fuel oil to a vehicle, and after the bubbles in the fuel oil are eliminated, the flow calculated by the piston flow meter is the same as the flow actually added by the vehicle. After fuel oil enters the overflow tank, the first impeller rotates to discharge the fuel oil into the extrusion cavity through the backflow tank, so that the fuel oil can conveniently flow back into the extrusion cavity after bubbles in the fuel oil are eliminated, and the suction force of the second impeller can discharge gas in the overflow pipe out of the exhaust port through the exhaust pipe; and the separated gas can be conveniently and quickly discharged.

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.

A pipetting head (100) for a liquid dispensing apparatus (10) for use with an array of removable pipettes (1010) is provided. The pipetting head has a pipette body mounting assembly (120) for holding the pipette bodies (1100) of the removable pipettes, a plunger mounting assembly (140) for holding the plungers (1200) of the removable pipettes, and a dispense drive actuator assembly (160) with a dispense drive mechanism (162) for moving the plunger mounting assembly along a drive axis. The pipetting head also includes a pipette body clamping mechanism (130) having a clamp drive mechanism (133) which includes a linear actuator (133) and a clamp drive linkage having at least one standoff (135) fixed to a clamping plate (125) and extending axially between the clamping plate and the actuator. The actuator moves the at least one standoff axially to selectively engage the pipette body clamping mechanism.

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 dosing device (20) for dosing a fluid has a fine dosing valve (24), a coarse dosing valve (26), and a valve block (22). The dosing device (20) is designed such that, in a first position, in which the fine dosing valve (24) is in an open position and the coarse dosing valve (26) is in a closed position, a fluid flows from a fluid inlet (28) through a fine dosing chamber (32) via a fine dosing valve seat (34) into a fine dosing outlet channel (40) during operation. In a second position, in which the fine dosing valve (24) is in a closed position and the coarse dosing valve (26) is in an open position, a fluid flows from the fluid inlet (28) via a coarse dosing chamber (36) and a coarse dosing valve seat (38) into a coarse dosing outlet channel (42). Furthermore, a dosing system with such a dosing device (20) and a dosing method are proposed.

A diaphragm box and side cover sealing structure of a diaphragm gas meter. A glue storage groove is formed in the surface where a diaphragm box is bonded to a side cover, and a limiting rib used for limiting the excessive pressing of the side cover to the diaphragm box is arranged on one side of the glue storage groove. Glue in the glue storage groove is applied, the glue amount height exceeds the height of the limiting rib, the side cover is mounted on the diaphragm box, and the limiting rib limits the continuous downward pressing of the side cover, so that the effective sealing glue amount between the diaphragm box and the side cover can be guaranteed, and the sealing performance between the diaphragm box and the side cover is ensured, thereby avoiding gas leakage.

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.

The invention 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.

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.

The invention discloses a diaphragm gas meter 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 n-shaped support, the third wheel is installed on the transverse frame through a supporting shaft, and a non-return structure is arranged between the third wheel and the transverse frame. The problem that an existing non-return structure is loud in sound is solved.

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.

To provide a drug injector that includes a sensing system for determining a dosage of a medicament in a cartridge in the delivery device.SOLUTION: An injection device includes a cartridge 102 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 108 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 120 disposed at the distal end of the cartridge, the electronic device including an emitter 202 configured to transmit a signal toward the stopper, a receiver 204 configured to receive reflections of the signal from the stopper, and a microcontroller 210 configured to wirelessly transmit data related to a position of the stopper in the cartridge.SELECTED DRAWING: Figure 2