A rod-style linear actuator for use with a housing associated with an axially-rotatable hollow internally-threaded shaft and a piston-driven device is provided where small, precise movement is necessary. The actuator includes a body, a lead screw engaging the axially- rotatable hollow internally-threaded shaft and terminating in a piston, and an anti-rotation device extending from to the lead screw and engaging one of the body or an opposing second body.
F04B 13/00 - Pumps specially modified to deliver fixed or variable measured quantities
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 15/00 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
B01D 15/10 - Selective adsorption, e.g. chromatography characterised by constructional or operational features
F04B 9/02 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
A rod-style linear actuator for use with a housing associated with an axially-rotatable hollow internally-threaded shaft and a piston-driven device is provided where small, precise movement is necessary. The actuator includes a body, a lead screw engaging the axially-rotatable hollow internally-threaded shaft and terminating in a piston, and an anti-rotation device extending from to the lead screw and engaging one of the body or an opposing second body.
Systems for use with liquid chromatography for provision of continuous flow or gradient flow in connection with two pumps providing mobile phase to a valve.
A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.
A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.
A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.
F16L 19/07 - Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends adapted for use in socket or sleeve connections
F16L 19/02 - Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
F16L 19/065 - Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
A tubing and ferrule assembly for use in joining a clad tubing to a fitting. The ferrule is bound to the clad tubing, which includes a partial jacket of stainless steel, such that the inert core protrudes from, and has a common outer diameter with, the jacket. The ferrule is bound to the jacket slightly more distant than necessary for the inert core to contact a fitting. When the ferrule is retained in place, the inert core is compressed and provides a true zero dead volume connection between the clad tubing and the fitting.
A temperature controller for simultaneously controlling the temperatures of a plurality of heating elements for use in chromatographic analysis including columns, detectors, valves, transport lines and other components.
A tubing and ferrule assembly for use in joining a clad tubing to a fitting. The ferrule is bound to the clad tubing, which includes a partial jacket of stainless steel, such that the inert core protrudes from, and has a common outer diameter with, the jacket. The ferrule is bound to the jacket slightly more distant than necessary for the inert core to contact a fining. When the ferrule is retained in place, the inert core is compressed and provides a true zero dead volume connection between the clad tubing and the fitting. The relationship of the ferrule, the clad tubing, and the fitting limits the position of the clad tubing and therefore precludes damaging of the associated valve or component.
A combined pump-injector valve system utilizing a monolithic body to provide the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample. The pump-injector valve system further includes a pressure sensor external the barrel of the pump and may include an interim position intermediate loading and injection where the contents of the barrel may be pressurized to a desired pressure.
B01D 15/14 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the introduction of the feed to the apparatus
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Instruments for laboratory use, namely ion mobility spectrometers, trace gas analyzers, and detectors. Instruments for industrial use, namely ion mobility spectrometers, trace gas analyzers, and detectors.
A heated rotary valve for use in connection with a sample to be separated in a column for heating the sample to temperature within the valve. The heated rotary valve permits introduction of compounds, having a wide boiling range, into a gas chromatograph with improved precision of area and retention time. The valve includes a stator, an elongate body, a rotor seal, a drive shaft, and an internal element for generating heat. The rotor seal may be laterally captured by a ring to prevent movement or creep due to heat absorption during operation.
F16K 11/085 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
F16K 11/076 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with pivoted closure members with sealing faces shaped as surfaces of solids of revolution
G01N 30/30 - Control of physical parameters of the fluid carrier of temperature
15.
Apparatus and methods for changing the concentration of gases in liquids
Apparatus, and components for use in apparatus, for changing the concentration of a selected gas in a liquid, for example for degassing liquids. In one apparatus, the apparatus has a flow channel (a) through which the liquid is passed, and (b) which comprises a wall comprising a planar separation membrane, and (c) has a height of 0.00025-0.01 and an aspect ratio (width to height) of at least 25:1. One component, which can be used to support a separation membrane, comprises (a) an inner selection plate surface which comprises (i) a selection plate base and (ii) selection plate elements which (a) extend from the base, (b) are separated by intercommunicating selection areas, and (c) have outer surfaces remote from the selection plate base. Another component is a planar separation membrane which comprises (a) a membrane transmission section, and (b) a membrane peripheral member which surrounds the membrane transmission section and which includes location features which facilitate the location of the membrane at a desired position relative to another component.
A detector for gas chromatography using two or more ionization sources within a single body to separately provide ionization energy to a column gas eluent to provide electrical discharge to two or more collecting electrodes provides improved selectivity and may be so used. Use is made of combined bias/collecting electrodes or of sets of separated bias and collecting electrodes. The use of multiple ionization sources permits generation of multiple detector outputs from within a common body and of a common constituent flow. The ionization sources and any applicable discharge gas and dopant may be selected based on desired selectivity.
G01N 27/62 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode
H01J 49/00 - Particle spectrometers or separator tubes
G01N 27/64 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
G01N 27/66 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
A combined dual pump-injector valve utilizing a single piece of material to house the barrel for each of the two piston-based pumps and to provide the stator of the associated valve, thus eliminating any need for connections between the pumps and the valve, and therefore eliminating the potential for high-pressure leaks or pressure reductions. The combined dual pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample.
B01D 15/14 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the introduction of the feed to the apparatus
F04B 19/00 - Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups
A combined pump-injector valve utilizing a single piece as the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample.
Chromatography apparatus for industrial purposes, namely metal-encased micro syringes used for sampling and measuring hard-to-handle volatile liquids and liquefied gases
non-metal chromatographic tubing fittings, chromatographic tubing for industrial purposes, chromatographic fluid and gas filters for industrial purposes, chromatographic frits for industrial purposes, chromatographic capillaries for industrial purposes, and chromatographic guard columns, all aforementioned goods specially adapted for chromatography apparatus for industrial purposes
22.
Photo ionization detector for gas chromatography having two separately ionizing sources and methods of use
A detector for gas chromatography using two ionization sources within a single body to separately provide ionization energy to a column gas eluent to provide electrical discharge to two or more collecting electrodes provides improved selectivity and may be so used. Use is made of combined bias/collecting electrodes. The use of two ionization sources permits generation of two detector outputs from within a common body and of a common constituent flow. The ionization sources and any applicable discharge gas and dopant may be selected based on desired selectivity.
G01N 27/62 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode
H01J 49/00 - Particle spectrometers or separator tubes
G01N 27/66 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
G01N 27/64 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
A planar degasser comprises (1) a flow plate comprising a flow channel, (2) a planar separation membrane comprising a membrane transmission section which has a first major surface and a second major surface, the flow channel being at least in part bounded by the first major surface of the membrane transmission section, (3) a supporting member which supports the second major surface of the membrane transmission section when the pressure on the first major surface is greater than the pressure on the second major surface, and (4) structural features which enable liquid to flow through the flow channel when the pressure on the first major surface is equal to or less than the pressure on the second major surface, for example when there is no longer a vacuum on the second major surface of the membrane transmission section. The structural features can for example be an open channel in the base of the flow plate, or upstanding features on the base of the flow plate, or a passageway which is closed when the vacuum is on, but open when the vacuum is off, for example a passageway having a valve which is controlled by the vacuum.
The adaptive temperature controller system includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.
G01N 27/62 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode
26.
Apparatus and methods for changing the concentration of gases in liquids
Apparatus for changing the concentration of a selected gas in a liquid, the apparatus comprising a flow chamber through which the liquid is passed and which comprises a wall comprising a planar separation membrane, the separation membrane being substantially impermeable to the liquid and permeable to the selected gas, characterized in that the separation member extends beyond the flow chamber and provides a seal between components of the apparatus. The apparatus is particularly useful for degassing liquids, for example HPLC eluents and analysis samples.
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
42 - Scientific, technological and industrial services, research and design
Goods & Services
Laboratory services, namely, calibration of measuring devices for others; calibration, testing, and certification services, namely, calibration of measuring devices in the terms of legal metrology, performance testing for the certification of permeation devices for others for the purpose of certification
09 - Scientific and electric apparatus and instruments
Goods & Services
permeation devices, namely, permeation tubes for use in generation of calibration gas standards; diffusion devices, namely, permeable diffusion gas container for calibrating and quantifying gas
The adaptive temperature controller (10) includes a device for measuring resistance, an electrically-conductive material (50), a power supply (11), and a device for controlling power (12). In operation, the controller (10) determines the resistance of material (50) at one or more temperatures and therefore determines the resistance of the material (50) through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material (50), and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.
A device for introduction of an ammonia dopant into a spectrometry system without the use of a delivery system containing ammonia. The delivery device includes an ammonium solid that will, upon the introduction of heat, yield ammonia gas for delivery into the spectrometer system. Use of such an alternative to traditional ammonia dopant systems will yield little or no change in spectrometer readings. The volumetric flow rate of the ammonium is controlled by the use of capillary tubes as the exiting pathway, where the flowrate is determined by the cross sectional area and length of the capillary tube. Delivery of the ammonia is aided by use of a frit or screen to permit only gas to exit.
Pressureless sintered high density materials containing hexagonal boron nitride have low coefficients of friction and high wear resistance and are useful for bearings, bushings and other articles subjected to bearing loads.
The adaptive temperature controller includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.
The adaptive temperature controller (10) includes an ambient temperature sensor (30), a device for measuring resistance, an electrically-conductive material (50), a power supply, and a device for controlling power. In operation, the controller (10) determines the resistance of material at or near ambient temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its instant temperature is known. Additionally, the adaptive temperature controller (10) determines the responsiveness of the electrically-conductive material (50) to determine the predicted increase in temperature and rate of increase in temperature relative to increases in voltage, current or power. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.
The adaptive temperature controller includes an ambient temperature sensor, a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at or near ambient temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its instant temperature is known. Additionally, the adaptive temperature controller determines the responsiveness of the electrically-conductive material to determine the predicted increase in temperature and rate of increase in temperature relative to increases in voltage, current or power. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.
The invention is a chemically-inert tubing (100) constructed to retain its chemically inertness while bearing on its outer section color coding to identify the inner diameter of the tubing (100). Afirst colorless and chemically-inert tubing (27) is concentrically adhered to an outer colored and chemically-inert tubing (29) such that the inner tubing (27) remains entirely chemically inert while the jacket tubing (29) provides color coding as to first colorless tubing (27) inner diameter. A co-extruder (100) to concurrently and concentrically produce a first colorless and chemically-inert tubing (27) concentric and a colored and chemically-inert jacket tubing (29) such that the two tubings (27, 29) are adhered together to form tubing (50) at the instant of production is also provided.
A sorption liner (100) has a sorbent material coating (150) on an inside surface (106). Sample components are adsorbed on the coating (150), the liner (100) is attached to an analytical device, such as a gas chromatograph, and the components desorbed.
This invention is a method and device for use with multi-dimensional chromatography that utilizes partial modulation with multiple secondary retention times. An analyte-bearing sample is subjected to a first dimension of chromatography. Thereafter the separated analyte-bearing sample is diluted with a modulated second carrier such at the analyte-bearing sample is not stopped or its temperature altered. The secondary retention time period at which the modulator cycles is variable among multiple secondary retention time periods to prevent loss of resolution with less complex and/or low boiling point compounds and to prevent loss of data with more complex and/or higher boiling point compounds. The partially modulated analyte-bearing sample then feeds into a secondary column where the analyte-bearing sample is further separated.
This invention is a method and device for use with multi-dimensional chromatography that utilizes partial modulation. An analyte-bearing sample is subjected to a first dimension of chromatography. Thereafter the separated analyte-bearing sample is diluted with a modulated second carrier such at the analyte-bearing sample is not stopped or its temperature altered. The partially modulated analyte-bearing sample then feeds into a secondary column where the analyte-bearing sample is further separated.
09 - Scientific and electric apparatus and instruments
Goods & Services
aerosol calibrating and quantification devices, namely, calibrated containers for gas; vapor measuring devices comprised of gas sample collection devices comprised of gas analyzers; disposable gas and liquid storage containers for calibrating and quantifying gas, disposable permeable diffusion gas containers for calibrating and quantifying gas; portable field use gas permeation calibrators; personal mounted gas detectors and explosive detectors
09 - Scientific and electric apparatus and instruments
Goods & Services
Electrical and scientific apparatus; including fittings, column end fittings, columns, tubing, injection, switching, stream selection valves, two position valves, multiposition valves, diaphram valves, valve actuators, controllers and accessories, control valves, flow controllers, components and systems.
09 - Scientific and electric apparatus and instruments
Goods & Services
Analytical apparatus and instruments and parts and fittings therefor, including liquid chromatography injectors, gas analysors, trace organics concentrators, electron capture detectors, and for valves, structural fittings, injectors, valve actuators, filters, valve sequence programmers, manifolds, temperature controllers, valve programmers, and electronic switching valves; analytical testing or processing apparatus and instruments and parts and fittings therefor, including digital valve interfaces, control modules, selection modules, position indicators, temperature controllers, heated valve and column enclosures, valve sequencers, gas analyzers, programmable microprocessor controllers, programmable microprocessor sequencers, pipe and syringe adaptors, column end fittings and parts for all the aforesaid goods.
09 - Scientific and electric apparatus and instruments
Goods & Services
Electrical and scientific apparatus, including accessories for scientific instruments for fluid sample injectors, and valves and fittings for controlling fluid flow in scientific instruments.
