18026results about "Multiple way valves" patented technology

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.

Methods and apparatus for implementing microfluidic analysis devices are provided. A monolithic elastomer membrane associated with an integrated pneumatic manifold allows the placement and actuation of a variety of fluid control structures, such as structures for pumping, isolating, mixing, routing, merging, splitting, preparing, and storing volumes of fluid. The fluid control structures can be used to implement a variety of sample introduction, preparation, processing, and storage techniques.

The present invention relates to an improved smoke evacuation device for use in laparoscopic surgeries. One improvement is a hydrophilic wick positioned within the inlet system of the smoke device for absorbing moisture and trapping surgical waste entering the smoke evacuation device. The second improvement is a multi-outlet valve inserted into the outlet system of the smoke evacuation device to enable quick depressurization of the surgical site.

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 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 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.

An electric conductivity water probe consisting of a test chamber having a wall, a fluids input / output port, and a water input port, the wall having a first and at least a second wall section, the first and at least second wall sections being electrically isolated from each other by an electrical insulator; and a valve connected operatively to the fluids input / output port, the valve being adapted for alternately and permitting and resisting flows of fluids through the fluids port.

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.

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.

Embodiments of the presently described technology provide a direction control valve including first and second orifices and a pressure release mechanism. The first and second orifices provide a path of fluid flow through the valve from an inlet port to a first outlet port. The pressure release mechanism is configured to reduce pressure in the valve through a second outlet port. Embodiments of the presently described technology also provide a direction control valve including first and second fluid communication paths. The first fluid communication path is defined by an inlet port, first and second orifices, and a first outlet port. The second fluid communication path is defined by the inlet port, the first orifice, a pressure release mechanism, and a second outlet port. The second fluid communication path of the valve does not exist until an internal pressure of the valve exceeds a predetermined threshold.

A gas valve for pulsing a gas comprises a housing having at least one inlet port, an outlet port, and a selector disk mounted in the housing and comprising at least one timing slot, wherein rotation of the selector disk periodically couples at least one inlet port to the outlet port through the timing slot.

A multi-function, random access, dual, three-way valve for use with fluid switching and the like is provided, whereby a first fluid flow to the valve is selectively placed in fluid communication with a first or a second outlet passage from the valve for selectively transferring the first fluid flow and a second fluid flow to the valve is, independent of the flow path of the first fluid, selectively placed in fluid communication with a third or a fourth outlet from the valve for simultaneously transferring the second fluid flow. A rotor element rotatably movable relative to a stationary stator element to at least four discrete angular positions actuates to multi-function switching capabilities of the valve when the rotor element is selectively placed in one of the at least four discrete positions. The valve directs the first fluid flow to one of two alternate outlet passages and, simultaneously and independently, directs the second fluid flow to one of at least two different outlet passages.