161 results about "Multi-valve" patented technology

A multi-function valve apparatus for use with a Probe-In-Loop (PIL) architecture sample injection assembly which enables both Partial-Fill and Complete-Fill injections. The rotor element is rotatable about a rotation axis relative the stator between: a Load Position, an Overfill Position, and an Injection Position. In the Load Position, a first bridge channel fluidly couples a metering syringe to the sample loop assembly enabling the probe to aspirate one of a discrete volume of sample into the probe, during a Partial-Fill Mode, and a second volume of sample into the probe, during a Complete-Fill Mode. In the Overfill Position, in the Complete-Fill Mode, a second bridge channel fluidly couples a downstream loop portion to a waste port, and the first bridge channel fluidly couples the metering syringe to an upstream loop portion of the sample loop assembly. This enables the metering pump to dispense the sample from the probe into the downstream loop portion and out the waste port to completely fill the downstream loop portion and the second bridge channel with a substantially precise known volume. In the Injection Position, the second bridge channel fluidly couples the downstream loop portion to the analyzing device to inject the sample into the analyzing device, in either the Partial-Fill Mode or and the Complete-Fill Mode.

An IV manifold includes a plurality of injection / aspiration ports and has an elongate configuration with a width greater than the diameter of the ports. A flow channel is formed between mating members of a housing and provided with a U-shaped configuration. Projections along the flow channel direct fluid flow into valve cavities associated with the ports to clear dead spots around the valve elements. A check valve included in the manifold tends to direct high pressures against the valve elements which respond by forming surface seals thereby avoiding deformation. An aspiration port can be formed with a second seal disposed on the side of the valve element opposite the first seal. Opening this second seal by negative pressure in the lumen of the port provides for the aspiration of fluids in the flow channel. Two-way aspiration can be provided by a valve having a cage with or without compressible characteristics to accommodate low tolerance fittings.

A lightweight carbon fiber air / gas supply vessel storing high pressure air / gas. The air / gas supply vessel output is controlled by an adjustable pressure reduction valve which varies output pressure from very high to low pressure levels. An alternative multi-valve system uses a first pressure reduction valve to reduce output pressure from the very high levels in the air / gas supply vessel to an intermediate pressure level, and a second pressure reduction valve that reduces the air / gas pressure from the intermediate level to a fine tunable low pressure level. In both embodiments, the output of the last pressure reduction valve used is connected to a high pressure cable which in turn uses a standard universal fitting which can be coupled to most pneumatically powered equipment. Additional high pressure reservoir vessels can be used to replenish the lightweight air / gas supply vessel when its supply of air / gas is depleted.

An apparatus for adjusting individual valve lift comprising a control arm assembly disposed between the cam lobes and the valve rockers for a multi-valve train. The control arm at each valve includes a driven gear. An actuator shaft includes a mating drive gear at each driven gear for rotating each control arm to vary the overall lift of the valves. In the prior art, the mating drive gears are fixed to the actuator shaft at identical fixed orientations. In accordance with the present invention, each mating drive gear is rotatably adjustable on the actuator shaft to permit changing of the orientation of each gear with respect to the actuator shaft, thereby changing the contact point of the control arm with its respective cam lobe. The lifts of the individual valves may be individually adjusted to provide equal air flow through all the valves in a multi-valve train.

Novel metal organic framework (MOF) molecules and methods of synthesizing them are described. MOFs are organometallic crystalline structures that have high sorption capacity due to high surface area, tailorable selectivity, an inert nature, and thermal stability at high temperatures. MOFs may be used as sorbents in preconcentrators for analytical devices to provide orders of magnitude of improved sensitivity in analyte detection. MOFs are also useful as sorbents in new compact and portable micropreconcentrator designs such as a modified purge and trap system and a multi-valve microelectromechanical system (MEMS) to achieve high gain in analyte detection. Further, MOFs may be used as coatings for novel microstructure arrays in micropreconcentrators where the microstructures are designed to increase the surface area to volume ratio inside the micropreconcentrator while minimizing the pressure drop across the micropreconcentrator.

Novel metal organic framework (MOF) molecules and methods of synthesizing them are described. MOFs are organometallic crystalline structures that have high sorption capacity due to high surface area, tailorable selectivity, an inert nature, and thermal stability at high temperatures. MOFs may be used as sorbents in preconcentrators for analytical devices to provide orders of magnitude of improved sensitivity in analyte detection. MOFs are also useful as sorbents in new compact and portable micropreconcentrator designs such as a modified purge and trap system and a multi-valve microelectromechanical system (MEMS) to achieve high gain in analyte detection. Further, MOFs may be used as coatings for novel microstructure arrays in micropreconcentrators where the microstructures are designed to increase the surface area to volume ratio inside the micropreconcentrator while minimizing the pressure drop across the micropreconcentrator.

A pressure regulator having a conduit with a plurality of adjustable valves inserted reversibly into the conduit. The valves are aligned along the axis of water flow. The interior of the conduit is divided into an inlet chamber and outlet chamber by a septum. The valves are inserted into the inlet chamber, and valve seats protrude through holes in the septum into the outlet chamber, thereby sealing the inlet chamber from the outlet chamber. Fluid flows into the conduit, into the inlet chamber, through the open valve, into the outlet chamber, and then flows out of the conduit. The valves regulate fluid pressure in the outlet chamber. The degree of pressure regulation can be adjusted for each valve by turning pressure adjustment knobs on the top of the valves to produce precise regulation of pressure and fluid flow. A conduit plug can replace a valve in the conduit.

The present invention relates to a multi-valve damper which divides a section of an airflow duct into at least two airflow sections. The damper has a plug body having a proximal end and a distal end. The plug body is adapted to separate a section of an airflow duct into at least two airflow sections. At least two damper blades may be mounted on the distal end of the plug body, each of the damper blades controlling airflow in a respective airflow section. At least one airflow sensor may be provided in each of the airflow sections for controlling the respective damper blades. An actuator mechanism responsive to the sensors may be provided for opening and closing the damper blades.

A gate valve for use in oil field applications and including a seat seal assembly. The seat seal assembly includes primary, secondary, and tertiary seals for sealing the space between the seat rings and the valve body. The provision of multiple seals in the seat seal assembly provides redundancy that allows for maintenance of the seal between the components even if one or two of the individual seals fail.

The invention relates to the technical field of pipeline valve detection equipment, in particular to a wireless valve leakage detecting system based on an acoustic sensor. During detection, the acoustic sensor transmits a collected acoustic leakage signal to a Fourier converter through a signal processor and an A / D converter, the fast Fourier converter performs fast Fourier conversion on the acoustic leakage signal, a corresponding frequency spectrogram is drawn, an analyzer is used to compare the frequency spectrogram with a pre-stored frequency spectrogram when valve leakage does not occur so as to judge whether valve leakage occurs or not, the judging result is transmitted to a controller, the controller transmits the judging result to a wireless receiving module through a wireless transmission module, and the wireless receiving module transmits the received judging result to a monitoring terminal. During multi-valve simultaneous detection, each valve leakage detecting device transmits the corresponding judging result to the monitoring terminal through the wireless transmission module, and a user can perform unified and real-time monitoring through the monitoring terminal.

A 4-stroke engine incorporating a mono-shaft multi-valve operating system, the multi-valve operating system incorporating a first cam follower assembly that is associated with an intake valve, a second cam follower assembly that is associated with an exhaust valve, and a cam follower channel assembly that is integrated into a crank web of the engine, the cam follower channel assembly including a base circle channel, a cam channel, and a cross-over channel. The cam follower channel assembly is configured to commonly interact with the two cam follower assemblies to operate the intake valve at a first instance, and the exhaust valve at a second instance, with both instances occurring while the crank web completes two rotations. When either of the two cam follower assemblies engages with a cam channel of the cam follower channel assembly, the cam follower channel assembly is configured to provide a camming operation to operate the respective valve. When either of the two cam follower engages a base circle channel of the cam follower channel assembly, the cam follower channel assembly is configured to prevent operation of the respective valve.

The invention discloses a variable-vortex air inlet passage of a multi-valve engine, and belongs to the technical field of air inlet systems of internal combustion engines. The variable-vortex air inlet passage comprises an air inlet manifold, a first air inlet passage, a second air inlet passage, an air inlet adjusting channel, a vortex adjusting valve and a vortex adjusting valve shaft. The air inlet manifold is connected with the first air inlet passage and the second air inlet passage; the first air inlet passage is communicated with the second air inlet passage via the air inlet adjusting channel; the vortex adjusting valve is mounted in the air inlet adjusting channel; the vortex adjusting valve is fixed onto the vortex adjusting valve shaft and rotates around the center of the vortex adjusting valve shaft; the opening of the vortex adjusting valve can be changed along with change of working conditions of the engine. Compared with the prior art, the variable-vortex air inlet passage has the advantages that the shortcoming of deterioration of the flow capacity of an existing air passage due to severe throttle effects which are realized for airflow in the existing air passage by an air valve during variable-vortex adjustment can be overcome; pumping loss of the engine can be greatly reduced; vortex in a cylinder can be conveniently controlled by the engine under the different working conditions, combustion can be organized, and the excellent fuel economy, dynamic performance and emission performance can maintain.

An IV manifold includes a plurality of injection / aspiration ports including a needleless access port (NAC). A check valve included in the manifold is generally located at an upstream end of the manifold. However, the check valve may alternatively be located between injection ports. An aspiration port can be formed with a second seal disposed on the side of the valve element opposite a first seal. Two-way aspiration can be provided by a valve having a cage with or without compressible characteristics to accommodate low tolerance fittings. Alternatively, two way aspiration can be provided by the NAC having a single elongate valve element including a plug at one end. The elongate valve element has properties for resiliently and sealingly biasing the plug into an aperture of the NAC. In use the Plug is mechanically displaced by insertion of a male Luer for injection or aspiration.

The invention discloses an ion chromatograph based on multi-valve switching and for offline and online analysis and a detection method of the ion chromatograph. The ion chromatograph comprises an automatic sample feeder, two chromatographic pumps, multiple six-way valves, an online purifying column, an enriching column, a chromatographic separation column, an ultraviolet detector, an inhibitor and an electrical conductance detector. Online switching of offline ion chromatographic analysis and online purifying ion chromatographic analysis can be realized on one ion chromatograph, the problem that conventional ion chromatographs can only conduct offline ion chromatographic analysis or online purifying ion chromatographic analysis is solved, and online switching of analysis systems can be realized according to properties of to-be-analyzed samples, so that convenience and using efficiency of the ion chromatograph are improved greatly, and using cost of the ion chromatograph is lowered. In addition, an online purifying analysis system saves sample pretreatment time and complex operation process; compared with disposable using characteristics of conventional purifying columns, the online purifying column is more environment-friendly through activation and regeneration treatment and recycling, and analysis cost is greatly lowered.

A multi valve two-stage pulse tube type GM refrigerator having a rotary valve that comprises one track for flow to the regenerator and two tracks for flow to the pulse tubes where the valve has two high pressure ports to the pulse tubes located on a single track and two low pressure ports from the pulse tubes located on a separate single track and where there are two cooling cycles per revolution of the rotary face valve.

A multi valve two-stage pulse tube type GM refrigerator having a rotary valve that comprises one track for flow to the regenerator and two tracks for flow to the pulse tubes where the valve has two high pressure ports to the pulse tubes located on a single track and two low pressure ports from the pulse tubes located on a separate single track and where there are two cooling cycles per revolution of the rotary face valve.

The invention provides an EGR (Exhaust Gas Recirculation) valve, belonging to the technical field of machines. The EGR valve solves the problem that the existing EGR valve of the double-valve structure can not satisfy the higher emission standard. The EGR valve comprises a valve body of which the inner part is a cavity, wherein the valve body is provided with an inlet and an outlet, and the inletand the outlet are communicated with the inner cavity of the valve body; a valve rod partially connected with a power part is arranged in the valve body; the inner side of the valve body is provided with at least two extruded sealing sockets; the valve rod is provided with valve blocks which are of the same amount with the sealing sockets and correspond to the position with the sealing sockets along the axial direction of the valve rod; and a sealing structure is arranged between the valve blocks and the sealing sockets. The EGR valve is provided with a multi-valve structure composed of multiple valves and sealing sockets, so that the valve rod has high control precision to each valve, and thus the tightness of the EGR valve can be greatly improved.

A method for a fuel system, comprising: during a first condition, fluidly coupling a fuel tank to a fuel vapor canister; and fluidly coupling the fuel vapor canister to atmosphere via a deactivated vacuum pump. By fluidly coupling the fuel vapor canister to atmosphere via a deactivated vacuum pump, the fuel tank may be depressurized slowly without requiring a multi-stage or multi-valve fuel tank isolation system. In this way, the cost and complexity of the fuel system is reduced.

The invention discloses an injection molding technology for a front bumper mask. The injection molding technology is characterized by comprising the following steps of raw material preparation, plasticizing and metering, injection molding preparation, injection molding, feeding, pressure maintaining, cooling, mold unloading, piece sampling, trimming and flame treatment. According to an automobile bumper obtained by adopting the technology, the production efficiency of the product can be improved, the production cost of the product can be lowered, and the quality of the finished product; a multi-valve gate is adopted, enough buffer exists in a cold rubber, and the obtained bumper is smooth and has no flaws. Drying is controlled to be performed for 2-4 h, the drying temperature is 80-90 DEG C, the water content of raw materials obtained after drying is completed is lower than 0.03%, and the bumper obtained by injection molding has no bubbles or shrinkage or sunken parts or other defects.

An EGR system for an IC engine, wherein the IC engine includes a block defining a plurality of combustion cylinders, a plurality of multi-valve heads, each multi-valve head associated with a respective combustion cylinder and including an inlet valve and an exhaust valve, an exhaust manifold fluid coupled with each exhaust valve, and an intake manifold fluidly coupled between the exhaust manifold and each inlet valve. The EGR system includes:a plurality of EGR inlet valves and a plurality of EGR exhaust valves, wherein each multi-valve head includes at least one EGR inlet valve and at least one EGR exhaust valve;an EGR exhaust manifold fluidly coupled with each EGR exhaust valve; andan EGR intake manifold fluidly coupled between the EGR exhaust manifold and each EGR inlet valve.

A gate valve for use in oil field applications and including a stem seal assembly and a seat seal assembly. Each of the stem and seat seal assemblies accommodate independent primary, secondary, and tertiary seals for sealing the space between the stem and the bonnet, or the seat ring and the valve body, respectively. The provision of multiple seals in each assembly provides redundancy that allows for maintenance of the seal between the components even if one or two of the individual seals fail.

The invention, which belongs to the technical field of the vacuum extraction equipment, provides a piece of vacuum extraction equipment. According to the technical scheme, the structural design of the vacuum system is improved based on the working practice. A filter valve is added and is used for reducing the influence on the high-pressure vacuum pumping unit by internal residues of the gas; and a low vacuum gauge and a high vacuum gauge are arranged to carry out precise measurement for the inside of the system, so that the equipment controlling becomes precise. Meanwhile, with a multi-valve series connection way, air intake stability can be guaranteed; and on the basis of a proper sealing way, the sealing performance of the high vacuum system is improved, thereby reducing the air leakage rate of the system and enhancing the safety of the equipment. The vacuum extraction equipment comprises a vacuum cavity, a process system, a vacuum breaking system, a low vacuum system, and a high vacuum system; and all systems are connected with the vacuum cavity. The working processes of low vacuum extraction, high vacuum extraction, process air intake, and vacuum breaking are realized. The vacuum extraction equipment can be applied to the vacuum extraction equipment technical field widely.

The present invention relates to a high voltage wiring terminal, comprising a high voltage socket, a high voltage plug elastic sheet, a high voltage plug, an insulated cylinder and a fastening device, wherein, the high voltage socket is fixed at one end of the insulated cylinder; multi-valve elasticity is adopted to fix the high voltage plug elastic sheet on one side of the high voltage socket positioned inside the insulated cylinder; the high voltage plug is fixed on the end of a coaxial cable and follows the coaxial cable to be plugged from the other end of the insulated cylinder; the high voltage plug is elastically connected with the high voltage plug elastic sheet; the position of the coaxial cable relative to the insulated cylinder is fixed by the fastening device. The wiring terminal realizes ohmic contact in high voltage high current and strong electric pulse transmission; the phenomena of contact spark discharge and the severe ablation of the wiring terminal cannot take place in discharge transmission process; a discharge circuit is low in inductance; high-voltage high-current and high-frequency pulse discharge transmission is stable. Therefore, electric equipment systems can reliably and stably work for a long time. The high voltage wiring terminal can be applied to host equipment and using high-voltage power supply and high-power lasers.

The invention relates to a passive valve for multi-valve devices for sealing a container or a line. According to one aspect of the invention, the passive valve is free of bearing supports which protrude in a positive sense out of the passive valve. The invention also relates to a multi-valve device for contamination-free connection of two containers or two lines with partial valves that can be rotated about a single axis. According to this aspect of the invention, at least three partial valves, which are arranged essentially parallel to one another and can be put under tension so they can be sealed with respect to their surroundings, can be rotated about the single shared axis.