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7288228 |
Sample injection system
An HPLC injection valve is mounted to a probe drive system close to the probe axis to minimize probe movements required for sample injections into a mobile phase column. The probe is directly...
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6890489 |
Mass rate attenuator
While a large primary stream ( 24 ) of analytes flow from a chromatographic column ( 20 ) to containers of a receiver ( 108 ), small samples of the analytes are diverted for flow to a mass...
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6875402 |
Micropipette, dispenser and method for producing biochip
A micropipette usable for producing a biochip inclusive of DNA micro arrays capable of arraying and fixing droplets of a micro-volume on a substrate in a high density includes a main body, at least...
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6810923 |
Pipet for liquid exchange
The invention features pipets for fast and efficient liquid exchange, pipet controllers for use with such pipets, and pipetting systems utilizing pipets and/or pipet controllers of the invention.
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6605257 |
Micro array manufacturing apparatus
A present micro array manufacturing apparatus includes a substrate placement portion 11 on which a plurality of substrates can be arranged, a tighter plate 12 for storing a solution including a...
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6599755 |
Method and device for applying small quantities of liquid
The present invention relates to a method of depositing small amounts of liquid on a substrate ( 13 ) by using a pipette tip ( 1 ), which is connected to a flexible delivery line ( 2 ). Liquid is...
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6451263 |
Pipette adapter
A multichannel pipette has downwardly depending tip cones to receive disposable tips which have free ends. Adjacent tip cones, and thus the disposable tips, are spaced apart a first distance, which...
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6426048 |
Sample dilution module with offset mixing chamber
The sample dilution module includes an oil filled aspiration probe and mixing chamber that communicate with each other while the mixing chamber is maintained at an angle of approximately 5 to 45...
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5874296 |
Method and apparatus for liquid medium exchange
The purpose of this invention is to provide a novel apparatus capable of suctioning a liquid from a container by using a vacuum. Simultaneously, the vacuum draws a second liquid from a separate...
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5869774 |
Device for taking a liquid sample
Apparatus for taking up liquid batches, comprising a take-up tube (10), a metering pump (20) for drawing liquid into the take-up tube by suction, and a washing pump (30) which functions to pump...
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5773305 |
Sample dilution module
The method of diluting a fluid sample for analysis in a sample analysis system includes the provision of an aspiration probe with two interior sections. The first interior section of the probe has...
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5753514 |
Method and sample container for collecting small quantites of liquid samples
When small quantities of liquid sample are to be collected from the outlet of a small cannula tube, there is used a sample container (1) which includes a narrow capillary tube (2) whose one end is...
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5637809 |
Vacuum extraction sampling system
A gas sampling system utilizes small sample vacuum transport to reduce the dew point of the sample. A vacuum pump maintains a substantial vacuum on the sampling system causing a sample, drawn at a...
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5558838 |
Sample preparation apparatus
A sample preparation apparatus includes a pair of valves. A first valve selectively communicates a sample tube with a vent/aspiration valve, or alternatively communicates a diluent pump with a...
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5536471 |
Syringe with bubble flushing
A bubble flushing syringe for aspirating and dispensing fluids through an open-ended tip with precision and volumetric accuracy is disclosed. The syringe comprises a piston within a bore formed by...
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5517870 |
Intra-liquid particle classification apparatus using light scattering
A liquid sample is sucked from a staining vessel by a first sampling nozzle and the liquid sample is discharged into a flow cell unit, the liquid sample being supplied to the staining vessel by a...
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5512248 |
Twin-probe blood sample diluting device
A blood diluting device that can be used in an automatic hematology cell counter, including an outer tube, and an inner tube suspended within the outer tube. A blood sample to be analyzed is...
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5506142 |
Probe wash for liquid analysis apparatus
A system for cleaning a probe used in analytic equipment--for example, that used in analysis of body fluids--in order to reduce carry-over of materials from one sample to the next. A probe wash is...
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5458010 |
Vacuum dilution extraction gas sampling system
A gas sampling system utilizing a pair of parallel sonic orifices. One of the orifices is connected to a source of filtered, heated samples. The second, larger orifice is connected to a source of...
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5187990 |
Method for dispensing liquids with a pipette with compensation for air pressure and surface tension
A hand held self-contained automated pipette for portable operation having an electrically operated digital linear actuator. The actuator preferably includes a stepper motor driving a rotor. A...
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5158751 |
Liquid metering and transfer valve assembly
A liquid metering and transfer valve assembly having the capability of metering, isolating, transfering and delivering precise microliter volume aliquots of a blood sample, from a source thereof,...
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4908187 |
Device for diluting and mixing liquids and applications for kinetic analysis
This invention relates to a diluting and mixing device which is capable of diluting a first solution to produce a second solution which is mixed with an undiluted third solution, to reproducibly...
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4871682 |
Diluent carryover control
An air knife is positioned to direct a stream or blast of air across the tip of a sample probe as it is withdrawn from a cuvette containing a reagent, diluent, and patient sample solution. After...
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4824641 |
Carousel and tip
An improved sample carrier and pipette tips for use in an automated sample handling device are disclosed. This carrier mounts on and is removable from a carousel and has spaced about the...
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4822569 |
Rotary shear valve with cleaning feature and method of using same
A rotary shear valve comprising two stators and a rotor is filled with specimen in a first rotary position. Movement of the rotor to a second rotary position divides the specimen into aliquots, one...
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4702889 |
Liquid sampling valve
A liquid diluting and transfer valve has disc like valve elements provided with faces frictionally engaged. The valve further includes passageways for passing both sample liquid and rinse liquid...
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4690005 |
Diluting dosage device
Diluting dosage device, in which there is a dilution-liquid cylinder (20), a sample cylinder (30), a press knob (2), and a blocking valve (21). When the knob is depressed, the blocking valve is...
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4659677 |
Method providing liquid mixing outside containers
A device and method are described for forming a drop of two liquids pendent each from a separate platform. Means are included for moving the platforms from a spaced-apart position to one in which...
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4633413 |
Digital dilution apparatus and method
Digital dilution apparatus is disclosed which performs multiple processing functions such as pipetting, diluting, titrations and the like under microprocessor control. The apparatus is responsive...
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4610170 |
Method for the dilution of liquid samples
Method for the precise dilution of a liquid sample, in which diluting agent is pumped through a main channel (1) open at its lower tip and, at the same time, sample is pumped through a side channel...
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4598840 |
Snap-in cartridge diluter
A precision fluid dilution device intended primarily for handling precisely sized fluid samples and diluting such samples with preset volumes of a diluent, such as a chemical reagent, in which the...
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4523484 |
Dilution pipetter
A dilution pipetter comprising a diluent sucking probe, a sample probe for sucking and discharging a liquid sample, a diluent discharging probe disposed adjacent to the sample probe, a plunger pump...
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4463615 |
Liquid transfer valve
A liquid transfer valve including a movable valve portion. A second valve portion is movable with respect to a first valve portion to allow probes to extend therethrough to pick up a liquids. Upon...
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4459267 |
Pipette means
Pipette means having aspirating and expelling means and a substantially cylindrical tube connected to a pipette tip for fluid flow therebetween; the expelling means being arranged to apply pressure...
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4441374 |
Device for diluting liquid sample
The disclosed device for diluting liquid sample feeds both the liquid sample and a diluent solution to a mixing point through a first and a second roller pumps respectively, so that the...
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4429583 |
Liquid uptake and discharge apparatus
An apparatus for taking up and discharging liquid has at least one piston cylinder which responds to a command by taking up or discharging liquid, the arrangement being such that the number of...
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4378333 |
Device for preparing blood smears on glass slides and method therefor
An integral device for preparing a smear of blood or other sample on a glass slide or other surface is disclosed. The device includes as an operatively integral structure an elongate reservoir...
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4346742 |
Method for diluting a liquid test sample and computer controlld diluting apparatus
Improved method for the pick up and delivery of a liquid test sample and diluent therefore by a single syringe having a syringe valve for placing the syringe barrel in fluid connection with either...
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4327595 |
Method and apparatus for simultaneous dilution and dispensation
A method and apparatus for achieving substantially simultaneous dilution or mixing and dispensing is disclosed wherein the diluent or carrier is supplied by a syringe including a relatively large...
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4283949 |
Dilute solution apparatus
An apparatus is provided for the preparation of a dilute solution of a sample of a fluid comprising a valve means communicating with a dilution means, a line to the dilution means to supply diluent...
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4228831 |
Probe and syringe drive apparatus
Automatic dispensing apparatus such as used in a chemical analysis system for transferring liquids from sample containers to analysis containers, including a pipet probe assembly with an elongated...
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4220621 |
Backwash system for diluting apparatus
Improvements in a backwash system for diluting apparatus wherein a rinse solution is directed to and through a sample pick-up probe to a receptacle and therefrom to a waste depositary. Either the...
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4207074 |
Liquid sample distributor
A liquid sample distributor comprises a sample transfer tube having a nozzle at one end for suction and discharge of a sample, a first switchable valve located intermediate the length of the sample...
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4204430 |
Automatic liquid flow sampling apparatus
An automatic sampling apparatus for withdrawing samples from a continuously flowing liquid for analysis by a flameless atomic absorption spectrometer includes a sample vessel which, at...
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4189943 |
Apparatus for volume measurement of liquids
A liquid volume measuring apparatus in constructed to simultaneously solve the problems of accuracy of measurement, contamination of the liquid, and speed of operation. This apparatus utilizes a...
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4140020 |
Seal-free pipette device
A method and apparatus for measuring a predetermined relatively small volume of liquid from a supply liquid and subsequently dispensing that volume of liquid. A long hollow tube having one end...
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4130394 |
Short sample detection
A dilutor/dispenser system wherein a marker, e.g., an air bubble, is introduced at the probe inlet prior to each aspiration cycle, so as to be displaced along the probe system during such cycle....
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4111051 |
Sampling procedure and device for flameless atomic absorption spectroscopy
An automatic sampling apparatus particularly adapted for flameless atomic absorption spectrometers has a turntable carrying a ring of sample containers. The turntable is rotatably mounted on a base...
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4108608 |
Diluting and dispensing probe for blood sample preparation
Sample preparation apparatus for forming a thin layer of diluted blood specimen on a substrate by centrifugal force includes a sample probe having coaxial blood and diluent conduits coupled to...
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4068529 |
Method and apparatus for automatically performing series analyses
Automatic sample preparation method and apparatus for making successive measurements with an analyzer by picking up with a single stepwise movable metering probe, in a first measuring cycle, a...
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