18082results about "Multiple way valves" patented technology

An aerosol generator includes a flow passage having an inlet and an outlet, a heater arranged relative to the flow passage for heating the flow passage, a source of material to be volatilized in communication with the inlet of the flow passage, a valve to open and close communication between the source of material and the inlet of the flow passage, and a pressurization arrangement for causing material in the source of material to be introduced into the flow passage when the valve is in an open position. The aerosol generator further includes a source of power for operating the heater and the valve, and a control device for controlling supply of power from the source of power to the heater and the valve. A metering device in an inhaler includes a pressurized source of medicated fluid and a metering chamber configured to deliver a predetermined volume of fluid to a heated flow passage in the inhaler. The metering chamber can be part of a rotary valve having a bore and a displacement member moveable within the bore from a first position where the fluid is loaded into the bore to a second position where the predetermined volume is ejected out of the bore. Another metering chamber has an elastic portion of a delivery passage in fluid communication with the pressurized source of liquid and the elastic portion of the delivery passage is deformed to eject the predetermined volume.

Methods and apparatus for calibrating a plurality of gas flows in a substrate processing system are provided herein. In some embodiments, a substrate processing system may include a cluster tool comprising a first process chamber and a second process chamber coupled to a central vacuum transfer chamber; a first flow controller to provide a process gas to the first process chamber; a second flow controller to provide the process gas to the second process chamber; a mass flow verifier to verify a flow rate from each of the first and second flow controllers; a first conduit to selectively couple the first flow controller to the mass flow verifier; and a second conduit to selectively couple the second flow controller to the mass flow verifier.

A gas flow rate verification unit capable of enhancing reliability of gas flow rate verification. The gas flow rate verification unit has a first cutoff valve that is connected to a flow rate control device and to which gas is inputted, a second cutoff valve for discharging the gas, a communication member for allowing the first cutoff valve and the second cutoff valve to communicate with each other, a pressure sensor for detecting the pressure of the gas supplied between the first cutoff valve and the second cutoff valve, a temperature detector for detecting the temperature of the gas supplied between the first cutoff valve and the second cutoff valve, and a control means for verifying the flow of the gas flowing in the flow control device, the verification being performed by using both the result of the pressure detected by the pressure sensor and the result of the temperatures detected by the temperature detector. The volume (Vk) between the valve seat of the first cutoff valve and the valve seat of the second cutoff valve is equal to or less than the volume (Ve) between the outlet of the flow control device and the valve seat of the first cutoff valve.

Modes, methods, systems and devices are described for providing assisted ventilation to a patient, including wearable ventilation systems with integral gas supplies, special gas supply features, ventilation catheters and access devices, and breath sensing techniques.

High-density microfluidic chips contain plumbing networks with thousands of micromechanical valves and hundreds of individually addressable chambers. These fluidic devices are analogous to electronic integrated circuits fabricated using large scale integration (LSI). A component of these networks is the fluidic multiplexor, which is a combinatorial array of binary valve patterns that exponentially increases the processing power of a network by allowing complex fluid manipulations with a minimal number of inputs. These integrated microfluidic networks can be used to construct a variety of highly complex microfluidic devices, for example the microfluidic analog of a comparator array, and a microfluidic memory storage device resembling electronic random access memories.

Apparatus and Methods are provided for a microfabricated fluorescence activated cell sorter based on a switch for rapid, active control of cell routing through a microfluidic channel network. This sorter enables low-stress, highly efficient sorting of populations of small numbers of cells (i.e., 1000-100,000 cells). The invention includes packaging of the microfluidic channel network in a self-contained plastic cartridge that enables microfluidic channel network to macro-scale instrument interconnect, in a sterile, disposable format. Optical and / or fluidic switching forces are used alone or in combination to effect switching.

A high frequency pressure oscillation device that selective restricts the flow of breathing gas to or from a patient to produce pressure spikes in the patient's airway that facilitate clearing secretions from the patient's airway. The device includes a patient circuit that defines a closed path between a source of breathing gas and the patient's airway. A valve is disposed in the patient circuit such that in an open position the path between the source of breathing gas and the airway of the patient is substantially unobstructed. When the valve is in a closed position, the path between the source of breathing gas and the patient's airway is at least partially obstructed to create the pressure spikes. An actuating system associated with the valve alternatively places the valve in the open position and in the closed position at a predetermined oscillation rate that is independent of patient effort.

A method of fabricating an elastomeric structure, comprising: forming a first elastomeric layer on top of a first micromachined mold, the first micromachined mold having a first raised protrusion which forms a first recess extending along a bottom surface of the first elastomeric layer; forming a second elastomeric layer on top of a second micromachined mold, the second micromachined mold having a second raised protrusion which forms a second recess extending along a bottom surface of the second elastomeric layer; bonding the bottom surface of the second elastomeric layer onto a top surface of the first elastomeric layer such that a control channel forms in the second recess between the first and second elastomeric layers; and positioning the first elastomeric layer on top of a planar substrate such that a flow channel forms in the first recess between the first elastomeric layer and the planar substrate.

A spray head for a faucet or the like has a wand body defining a flow path from an inlet to first and second outlets. Diverter seats are provided so a face seal on a diverter spool can direct flow to the first or second outlet. The spool is positioned by a trigger acting on cam surfaces formed on a toggle. A spring biases the toggle to one of two stable states. Movement of the spool by the trigger causes the toggle to change states so subsequent actuation of the trigger causes the spool to move in the opposite direction. The wand body also has a pause button that reciprocates in a chamber that is part of the flow path. The chamber includes a valve seat and the pause button has a spool having a face seal that is engageable with the valve seat to shut off flow through the spray head. A return spring causes separation of the pause button's face seal upon release of pressure on the pause button. The pause button's seals in the chamber are arranged to have equal diameters and thus provide balanced hydraulic forces on the spool.

A multiport rotary valve apparatus for directing fluid streams which has two circular stationary heads and two circular rotating heads. The first stationary head has at least two and preferably more primary ports for connection with fluid streams and a corresponding number of secondary ports for connection to fluid-solid contacting chambers. The second stationary head has the same number of primary ports as the first stationary head (at least two and preferably more) for connection with the fluid streams and the same number of secondary ports for a second connection to the fluid-solid contacting chambers. Each stationary head includes internal conduits for the connection of the primary and secondary ports to a rotating head. The first rotating head is in communication with the first stationary head while the second rotating head is in communication with the second stationary head. Each rotating head has internal transverse conduits formed therein for the purpose of redistributing the flow coming from a primary port in the stationary head back to the secondary port in the same stationary head. In conjunction with offset and recessed arcuate obround windows in either the stationary or rotating heads, the internal transverse conduits in the rotating heads are formed in a very specific pattern that allows each primary port to connect to each secondary port and thereby each fluid-solid contacting chamber in a sequential manner upon one index of the rotating heads. The timing of the index can be varied to accommodate the specifics of each process. The net effect of the apparatus is the simulated movement of each chamber through the various fluid streams without physically moving the chambers.

The present invention is directed to a microfluidic chromatography apparatus comprising a microfabricated fluid delivery system and a chromatography column which is in fluid communication with the fluid delivery system, and a method for producing and using the same. Preferably, the chromatography column comprises an OTLC, PCLC, or combinations thereof.

A headgear for use with a patient interface for delivering a flow of breathable gas to a patient includes at least a strap (741) adapted to position the patient interface in sealing engagement with the patient's airways. The strap is constructed from an elastomer and a first side of the strap includes a first region (215) on a portion of its surface that is textured to reduce friction with objects contacting the strap. A textured surface coating for a portion of an elastomer strap included in a headgear system is adapted to contact the skin of a patient, when in use, and the coating has a Ra value greater than zero. A vent (500) for use with a patient interface for delivering a flow of breathable gas to a patient includes a plurality of rises (580) and runs (570) in a stepped arrangement; and a plurality of holes (510) in the stepped arrangement for the venting of gas.

This invention provides microfluidic devices that comprise a fluidics layer having microfluidic channels and one or more regulating layers that regulate the movement of fluid in the channels. The microfluidic devices can be used to mix one or more fluids. At least a portion of the fluidics layer can be isolated from the regulating layer, for example in the form of a shelf. Such isolated portions can be used as areas in which the temperature of liquids is controlled. Also provided are instruments including thermal control devices into which the microfluidic device is engaged so that the thermal control device controls temperature in the isolated portion, and a movable magnetic assembly including magnets with shields so that a focused magnetic field can be applied to or withdrawn from the isolated portion or any other portion of the microfluidic device. Also provided are methods of mixing fluids. The methods include stacking a plurality of alternating boluses of different liquids in a microfluidic channel, and moving the stacked boluses through the channel. In another method, the boluses are moved into a diaphragm valve having a volume able to accommodate several boluses, and then pumping the liquids out of the valve.

The present invention is directed to a microfluidic chromatography apparatus comprising a microfabricated fluid delivery system and a chromatography column which is in fluid communication with the fluid delivery system, and a method for producing and using the same. Preferably, the chromatography column comprises an OTLC, PCLC, or combinations thereof.

A blood sampling device for allowing a fluid pressure measurement and a fluid sample to be taken from a patient, having an inlet port configured to receive blood from the patient, an outlet port configured to be coupled to a monitoring channel having an infusion fluid, a sampling port configured for extraction of blood from the patient, a sampling channel configured to self-flush, after extraction, the blood with the infusion fluid, and an auxiliary channel for self-flushing the sampling channel.

A manifold system for enabling a distribution of fluids includes a plurality of individual manifold blocks that can be joined together to form a gas stick. Each manifold block will have a fluid passage way with an entrance port and exit port accessing a common surface. An active component can be mounted to one manifold block, while extending across a port of an adjacent manifold block. An alignment system can be provided to ensure that the entrance and exit ports are positioned in a plane containing the common surface to facilitate sealing.

Breathing assistance apparatus including humidifier (4) and heated conduit (6) adapted to deliver humidified gases at desired and accurate level of humidity to patient. Humidifier includes controller (18) that delivers flow rate, temperature and humidity of gases and then determines required power input to deliver gases as required. Need for external sensors is dispensed with providing simple and less bulky apparatus.

A self-occluding catheter includes a body portion for connection to extracorporeal equipment. An elongated tubular extension is provided for insertion into a body cavity. The body portion includes a resiliently biased spool supported therein which is slidable between an open and a closed position for alternately permitting and stopping the flow of blood through the catheter during a given medical procedure. The biasing device for resilient biasing the spool preferably comprises one or more magnets fixed within the body portion which generate a magnetic force for urging the magnetically polarized spool to its closed position.

The present invention provides a medical liquid administration apparatus and administration method that are particularly apt for intravenous (IV) applications. More particularly, the administration apparatus and method may be employed in conjunction with the administration of liquid medication and one or more flush solutions from multi-dose sources, wherein fluid interconnections between at least one flush solution source and the administration apparatus may be established a single time at the outset of a given procedure. The administration apparatus may include a valve having a control member selectively positionable to provide any selected one of a plurality of closed flow paths through the valve, and a syringe interconnected to the control member for clockwise / counterclockwise co-rotation therewith (e.g. to establish the selected flow path).

Ventilator systems include: (a) a mass flow controller; (b) a gas delivery valve in communication with the mass flow controller and configured to selectively dispense a plurality of different gases to a subject; (c) a first gas source in fluid communication with the gas delivery valve; (d) a second gas source in fluid communication with the gas delivery valve; (e) a first pressure sensor located upstream of the gas delivery valve; (f) a second pressure sensor located downstream of the gas delivery valve; and (g) a controller operatively associated with the first and second pressure sensors and the mass flow controller, the controller comprising computer program code that monitors the pressures measured by the first and second pressure sensors and automatically dynamically adjusts the flow rate of the mass flow controller.

Flow controllers are provided for interconnecting a fluid source to two separate collection zones. The flow controllers include a body having a fluid inlet communicating with the source and two fluid outlets, each communicating with one of the collection zones. An actuator member received within a cavity of the body includes first and second flow paths. In a first position, the first flow path is aligned with the fluid inlet of the body to allow fluid communication with one of the fluid outlets and the associated collection zone. The actuator member is non-rotationally moved to a second position within the cavity to align the second flow path with the fluid inlet of the body, thereby halting flow through the first flow path and allowing fluid communication with the other collection zone. An optional safety feature prevents movement of the actuator member from the second position to the first position.

Aerosol delivery systems and methods for delivering an agent to a patient are described herein. The present invention includes embodiments comprising an insulated receptacle connected to a body to hold a vial of an agent to be delivered to a patient. The vial is located in an inverted position within the receptacle and connected to the housing. One or more reusable thermal packs can be located on the inner sides of the receptacle, to maintain a selected temperature surrounding the vial. The agent is administered to a patient by placing a prong into one of the patient's orifices and then activating an aerosol delivery system. Such systems comprise jet aerosolization and pneumatic and ultrasonic nebulizers and preferably are portable.