1203 results about "Micro pump" patented technology

A micro-pump that supplies medication from a reservoir to a patient through a flexible tube is disclosed. The pump, which is especially suitable but not confined to delivering insulin to diabetic patients, is small and light enough to be attached to the body using adhesive plaster or to be strapped to the body in any other manner. In the preferred embodiment the pump mechanism comprises a lead screw, a weak force rotating element, an actuator, and a high force holding element. The device also includes a processing circuitry for controlling and monitoring the drive mechanism, a force sensor to measure medication pressure which generates indicative signals to the processing circuitry, a sensor for tracking the position of the syringe plunger, and a remote control unit.

A device for feeding e-liquid in an e-cigarette, comprising a vaporization zone with at least one wick and a resistor, a reservoir of e-liquid, and a battery for supplying electrical energy to at least the resistor. The device comprises at least one micro pump interposed between the reservoir and the wick. An e-cigarette incorporating the feeding device is also disclosed.

An intravascular catheter device having a catheter and an ultrasound ablation manifold is proposed for generating cavitations and acoustic jet streams in the blood to ablate atheroma. The ablation manifold has a power transducer and a coupled leaky acoustic cavity. The leaky acoustic cavity contains a first portion of ultrasonic power emission for intra-cavity ablation while allowing a second portion of ultrasonic power emission to leak outside for an extra-cavity ablation. The power transducer and the leaky acoustic cavity are configured to form a confocal resonant cavity. An intervening bird cage is coupled to the resonant cavity for stronger resonance while maintaining ultrasound leakage. A protective shield is mounted around the waist of bird cage to strengthen resonance and to prevent damaging the intima from an otherwise normal incidence of high intensity ultrasound. A microbubble releasing device and micro pump are also included to further increase the ablation efficacy.

The invention provides a microfluidic device and a method for preparing microgel by using the microfluidic device. The method comprises the steps of (1) taking a solution containing live cells or bioactive molecules, a photocuring agent and a hydrogel prepolymer as an internal phase, taking a mixed solution containing oil and an surfactant as an intermediate phase, and taking a polyvinyl alcohol aqueous solution as an external phase; (2) respectively conveying the internal phase, the intermediate phase and the external phase into a corresponding microchannel of the microfluidic device through a micro pump or a micro injector to form a monodispersed water-in-oil-in-water double emulsion; (3) enabling the monodispersed water-in-oil-in-water double emulsion in the step (2) to pass through an output channel of the microfluidic device, and collecting the monodispersed water-in-oil-in-water double emulsion in the step (2) into a collection vessel filled with an aqueous solution, thus obtaining the microgel immobilizing with the live cells or the bioactive molecules. The preparation of the microgel immobilizing with cells by a one-step method is realized, the obtained microgel is controllable in size, and narrow in size distribution, and meanwhile the survival rate of cells is maintained.

The portable micro PCR chip system prepared by MEMS or micro-model technique in bio-micro EMC system field comprises some trap-type reaction ponds for DNA amplification connected to liquid inlet/outlet by flow passages, an integrated micro-heater and sensor for amplifying DNA by the temperature cycle control system, a micro-pump and micro-valve on pond inlet to lead the DNA initiator and ponds insulation, and maybe a fluorescence excitation source, a detector and a fluorescence signal detection and analysis system for on-line detection on PCR product. This chip system provides a high-flux and fast DNA amplification means with low cost and well reliability.

An apparatus and method for pumping and optionally mixing of small quantities of biological fluid wherein the pumping mechanism is segregated from the biological fluid being pumped. The micro-pump pushes the biological fluid by compressing a cartridge housing the blood and reagents with collapsible walls with a roller or ball bearing, synchronized perpendicular plungers, or an acutely-angled member to push the biological fluid by collapsing the walls of the cartridge in the direction of flow.

A micro valve includes a first valve chamber and a second valve chamber as well as a closing element, which is adjustable between an opening position, in which the valve chambers are connected to each other, and a closing position in which the valve chambers are separated from each other. A reference chamber is provided, which is delimited by the closing element.

A fragrance emitting apparatus for connection to a USB port. In one embodiment, the fragrance emitting apparatus comprises a casing having an interior and at least one vent in communication with the interior, a cover removably attached to the casing to provide access to the interior, and a fragrance bottle removably disposed within the interior of the casing and having therein a liquid that provides a desired fragrance. The fragrance bottle further comprises a fragrance member having a first portion within fragrance bottle and a second portion extending from the fragrance bottle. The fragrance member is configured to absorb liquid in the fragrance bottle. The apparatus further comprises a micro-pump device positioned within the interior of the casing and adjacent to the second portion of the fragrance member. The micro-pump device has an oscillating member that contacts the second portion of the fragrance member. The apparatus further includes a control circuit to control the micro-pump device the control circuit generating an electrical wave signal having a predetermined frequency that causes the oscillating member to vibrate so as to diffuse fragrance liquid that contacts the oscillating member. A USB connector is connected to the casing and electrically connected to the control circuit. The diffusion of the fragrance liquid produces a fragrance that exits the casing through the vent. Other embodiments of the apparatus of the present invention are disclosed herein.

The invention relates to light solidifying rapid forming photosensitive resin liquid level control and resin bed coating method and device. The method combines the resin liquid level control with the resin bed coating in rapid forming, uses micro pump to inject resin into scraper by flexible duct, and finishes the level control and coating while the scraper is doing horizontal movement on the main channel liquid surface. The invention overcomes the defects of uneven resin coating and low thickness precision. In addition, it has little influence for the resin liquid level fluctuation without waiting to nature flow flat for long time. Thus it can increase work efficiency.

The invention provides a combination of a micro pump 27 or a micro valve with a vibrating mesh nebuliser 2. This is powered by a controller 3. The controller 3 may have modifications to provide the electrical drive mechanism for the pump 27 in addition to fulfilling the aerosol/nebuliser drive requirements. In one case the system is used for humidifying gas in a ventilator circuit. A humidifying agent (sterile water or sterile saline) is aerosolised and then delivered to a ventilator circuit 100 coupled to the respiratory system of a patient.

The system comprises: a chip of electron device; a micro jet-stream appliance, a liquid reserve tank with a cooling unit, and a micro pump. It features the following: the cooling media uses liquid or gas, and is cycled to form a closed cooling system; on the top of the liquid reserve tank there is a fan and a heat-sink installed; the liquid reserve tank is connected to the micro pump and micro jet-stream appliance; there are multi chambers set in the jet-stream appliance; between the chambers there are separators; the chip of electron device is mounted on the micro jet-stream appliance.

The invention discloses an efficient trapping system of micro-nanometer dust in the air. The invention comprises an air trapping opening, a filter core, a sprayer, a big and small flow micro pump, an atomizing nozzle, a liquid storage chamber, trapping liquid, a baffle and a vacuum pump, which construct an air flow route and a liquid circulation route, the system designs the air containing dust and the trapping liquid to experience four different absorption and trapping processes continuously, so as to realize efficient trapping of the micrometer and nanometer dust composed of various grains. By changing the variety of the trapping liquid or adjusting the hydrophile-lipophile balance (HLB) value of the trapping liquid, and improving the wettability of the trapping liquid and the nano dust in the air, micro nanometer fiber, thin sheet dust and other solid dust particles of various forms, containing micro-nano particles, can be efficiently trapped. The invention designs a plurality of air-liquid continuous contact processes, the air containing dust and the trapping liquid are only mixed and absorbed in the system, thus efficiently trapping nano dust in various dust density environment air including occupation workplaces.

A micro integrated analysis system includes a testing chip, system main body and heat insulating section. The chip has a pump connecting section to communicate with micro pumps; a mixing flow path for mixing a specimen and reagent and for reaction processing by heating; and a testing flow path for performing a predetermined test of a mixed solution heated and processed for reaction. The system main body has a holding section to hold the testing chip; micro pumps for injecting a specimen and reagent; a heating section for heating the mixing flow path; and a detection section for performing a test in the testing flow path. The heat insulating section insulates flow path portions continuing from both an inlet end and outlet end of a heated flow path area of the mixing flow path, from heat of the heating section so as to prevent a rise in temperature.

A PDMS valve-less micro pump structure includes a PDMS body having a contour surface, a membrane covering the contour surface of the PDMS body, and a PZT actuator located on the membrane. The contour surface of the PDMS body to be sealed by the membrane and the PZT actuator has in series a lead-in cavity, a lead-in nozzle structure, a main cavity, a lead-out nozzle structure, and a lead-out cavity. The PZT actuator is located right above the main cavity. By providing the PDMS as a material to form the body of the micro pump, the micro pump can then be mass-produced with less cost and simpler structuring. Also, substantial elasticity and bio-compatibility for the micro pump can be achieved.

The invention discloses a method for preparing a nanofiber membrane modified paper base material based on electrostatic spinning and an application of the nanofiber membrane modified paper base material. The method for preparing the nanofiber membrane modified paper base material based on the electrostatic spinning comprises the following steps: after dissolving a polymer raw material into a solvent to prepare a spinning solution, putting the spinning solution into a liquid storage device; after adjusting the voltage of the electrostatic spinning, continuously feeding the spinning solution in the liquid storage device into a spinning head connected with the liquid storage device through a micro pump; and spraying the spinning solution by the spinning head to the surface of a raw paper base body which moves continuously to form a nanofiber membrane, thereby obtaining the nanofiber membrane modified paper base material. The preparation method is simple and can realize continuous industrial production; the prepared nanofiber membrane modified paper base material is applied to preparation of a cigarette paper filter stick which can be used for improving the smoking quality of cigarettes and effectively reducing tar and phenol releasing amount in main stream smoke of the cigarettes.

The invention discloses a preparation method of acrolein, taking biological glycerol as the raw material and the modified zeolite supported heteropolyacid as catalyst, the method prepares acrolein directly by dehydration reaction. 18 to 30 catalyst are put in the middle section of a normal pressure continuous fixed bed reactor, with the volume space velocity of 1 to 10 h<-1>; under the protection of N2, the catalyst bed raises the temperature to 180 to 540 DEG C, and the biological glycerol solvent which is added with inhibitor is put into the fixed bed reactor from a micro pump; after gasified, the glycerine solution reacts by the catalyst bed. After reaction, the product is absorbed by acetone, then is separated and purified, thus obtaining acetone. The invention adopts the alkali metal, phosphoric oxides, alkali metal compound improved catalyst as carrier to carry heteropoly acid catalyst which is green and environmental catalyst and has the advantages of high activity, regeneration property, no pollution, simple reaction, operation process, low production cost, high mole selectivity of acrolein and high conversion rate of biological glycerol.

The invention is a piezoelectric ceramic plate for manufacturing a micro-pump and a micro-air pump. Its piezoelectric ceramic crystal membrane is bonded with a metal substrate through insulating layer, the insulating layer provides a safe creepage distance between the membrane and the substrate, the other surface of the metal substrate is provided with a pressure resistant protective layer, and the surface of the membrane is provided with a protective layer. The upper and lower covers of the micro-air pump are seal-fixed with the upper and lower ends of a pump body, respectively, the pump body is provided with a round pump cavity, the pump core is the membrane, the metal substrate is supported by sealing ring to be elastically fixed in the pump cavity and closes the lower end of the pump body into a working pump cavity, which is connected through one-way valve with air suction and exhaust pipes. The invention has high energy utilization ratio, simple structure and low noise.

A focused droplet nebulizer of the invention produces substantially uniform droplets of a predetermined size. Droplets are pushed out through a small outlet orifice by the contraction of a chamber. The droplets can be carried on a substantially non-divergent path in a drift tube. A piezo membrane micro pump acts in response to an electrical control signal to force a droplet out of the outlet orifice. The nebulizer can operate at frequencies permitting a stream of individual droplets of the predetermined size to be sent along the substantially non-divergent path in the drift tube in a preferred embodiment ELSD device.

An aerosol-generating system may include a liquid storage portion configured to hold liquid aerosol-forming substrate, a vaporizer including a heating element with an internal passage at least partially defined by a surface of the heating element, and a micro pump configured to deliver liquid aerosol-forming substrate from the liquid storage portion to the internal passage of the heating element, such that the vaporizer is configured to heat the delivered liquid aerosol-forming substrate at the internal passage to a temperature sufficient to volatilize at least a part of the delivered liquid aerosol-forming substrate. The micro pump may be configured to deliver a particular amount of liquid aerosol-forming substrate to the internal passage based on the micro pump performing an individual pump cycle.