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US3583232A - Flow regulation system utilizing shear valve and pilot fluid - Google Patents

Flow regulation system utilizing shear valve and pilot fluid Download PDF

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Publication number
US3583232A
US3583232A US835073A US3583232DA US3583232A US 3583232 A US3583232 A US 3583232A US 835073 A US835073 A US 835073A US 3583232D A US3583232D A US 3583232DA US 3583232 A US3583232 A US 3583232A
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Prior art keywords
storage means
sample storage
samples
sample
pump
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US835073A
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English (en)
Inventor
Jack Isreeli
Aaron Kassel
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Technicon Corp
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Technicon Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis

Definitions

  • the valve provides a movable 23/292 sample storage element and the system includes a pump and [51] ll. Cl G01 1/14 conduit arrangement to pump the amples into the ample [50] Field Of Search ..73/23, 23.], torage element and to pump the samples out of aid ample 232 storage element at substantially constant flow rate through use 3l C, 193 C of said pilot fluid.
  • the shear valve is operable in the manner of [56] R f Cxed a transfer mechanism to transfer the sample storage elements e erences I between a position of operative connection with a sample inlet UNITED STATES PATENTS conduit and a position of operative connection to a sample 3,080,759 3/1963 McQuaid 73/422(GC) outlet conduit.
  • This invention relates to a new and improved flow regulation system utilizing shear valve and pilot fluid which is particularly adaptable for use in the supply of corrosive fluid samples, which may be of varying viscosity, at substantially constunt flow rate to fluid sample analysis means.
  • Another object of this invention is the provision of flow regulation system as above which is additionally utilizable in perfectly satisfactory manner for the supply of noncorrosive fluid samples at substantially constant flow rate to fluid sample analysis means.
  • Another object of this invention is the'provision of flow regulation system as above which can operate automatically to divide each fluid sample into two or more fluidssample portions for the substantially simultaneous supply thereof to fluid sample analysis means.
  • a further object of this invention is the provision of a flow regulation system as above which requires the use of only readily available components of proven dependability in the fabrication thereof whereby long periods of satisfactory, maintenance-free operation thereof are assured.
  • sample storage means transfer means which take the formof a shear valve.
  • Said sample storage coil is operatively connected to one shear valve plate of a relatively movable pair of the latter and the same are operable, in a first relative position thereof, to operatively connect a source of supply of said samples, said sample storage coil, and said sample pumping means -to enable the pumping of said samples into said sample storage coil; and are operable, in a second relative position thereof, to operatively connect said pilot fluid introduction means and said sample storage coil to enable the displacement of the sample from the storage coil by the pilot fluid.
  • Additional means are provided in said shear valve to enable the introduction ofa bubble of air into said sample storage coil intermediate the operative connection thereof to said sample pumping means and said pilot fluid introduction means, respectively.
  • FIG. 3 is a schematic flow diagram of the new and improved flow regulation system of the invention in another operational condition thereof.
  • FIG. 4 is a schematic flow diagram of the new and improved flow regulation system of the invention in still another operational condition thereof.
  • the system of the invention comprises a sample supply device, as generally indicated at l0, for supplying a successive series of liquid samples, spaced by intervening segments of air and a suitable wash liquid, to a conduit 12.
  • the sample supplydevice 10 may, for example, be of the type shown and described in U.S. Pat. No. 3,230,776 issued to .lack Israeli et al. on Jan. 25, I966, and comprises a plurality of sample'cups 14 disposed as shown on a turntable 16 which is intermittently rotated past an offtake tube assembly as generally indicated at 18 to sequentially present each of the said cups to the said assembly.
  • the inlet end of the included offtake tube 20 is disposed therein for a predetermined period of time to aspirate a measured volume of sample therefrom.
  • the said offtake tube inlet-end is disposed in a container 22 ofa suitable wash liquid for the aspiration ofa measured volume of said wash liquid therefrom.
  • a fluid stream will be supplied therefrom to the conduit 12, and that such stream will be constituted by successive samples from the respective sample cups l4 spaced, in each instance, by bubbles of air-as provided during the travel of the offtake tube 20 through the ambient air from a said sample cup to the wash liquid container 22 and vice versa-and a slug of the said wash liquid disposed between said air bubbles.
  • a shear valve which operates as a fluid sample transfer means is indicated generally at 24 and may be seen to com-- prise a stationary, lower valve plate 26, and an upper valve plate 28 which is rotatable in counterclockwise direction as seen in FIGS. 2 through 4 relative to said lower valve plate under the control of valve operating means as indicated at 30 and which may take any suitable form in the nature, for example, of an electric motor.
  • a first set of fluid storage coils is indicated generally at 32 and comprises fluid storage coils 34 and 36, including inlet and outlet conduits 38 and 40, and 42 and 44, respectively; while a second set of fluid storage coils is indicated generally at 39 and comprises fluid storage coils 46 and 48, including inlet and outlet conduits 50 and 52, and 54 and 56, respectively,
  • each of said first and second sets of fluid storage coils are mounted atop, and operatively connected to, the upper valve plate 28 so as to be movable therewith upon rotation of the latter for purposes described in greater detail hereinbelow,
  • a fluid outlet conduit 58 is operatively connected as shown to the lower valve plate 26 and, as depicted, includes a highflow resistance coil 60 and vacuum pump means 62 connected therein, with the function of the former being to establish a predetermined, substantially constant flow rate upon operation of the latter.
  • a fluid outlet conduit 58 may be connected in fluid outlet conduit 58 to pump fluid therethrough, in which case the highflow resistance coil 60 would not be necessary.
  • Fluid inlet and outlet conduits are indicated at 64 and 66, respectively, and are each operatively connected as shown to the lower valve plate 26.
  • FIGS. 2, 3 and 4 Reference is now made to FIGS. 2, 3 and 4 for the description of the conduit connections effected through the shear valve 24 when the system of the invention is in a variety ofthe operational conditions thereof.
  • fluid outlet conduit 58 is connected, through mated bore 76 (FIG. 3) in lower valve plate 26 and bore 78 in upper valve plate 28, to the storage coil outlet conduit 44; while the respective storage coil inlet and outlet conduits 42 and 40 are connected through elongate groove 80 in lower valve plate 26 and bores 82 and 84 in upper valve plate 28.
  • storage coil inlet conduit 38 is connected, through mated bores 86 and 88 (FIG. 3) in said upper and lower valve plates, to the sample supply conduit 12, while the offtake tube 20 may be seen to be operatively disposed in a first sample cup 14 to aspirate sample therefrom.
  • pilot fluid inlet conduit 68 is connected, through mated bores 90 and 92 (FIG. 3) in said upper and lower valve plates, to storage coil inlet conduit 56; while storage coil outlet conduit 54 is connected, through mated bores 94 and 96 (FIG. 3) in said upper and lower valve plates, to system fluid discharge conduit 72.
  • pilot fluid inlet conduit 70 is connected, through mated bores I and 102 (FIG. 3) in said upper and lower valve plates, to storage coil inlet conduit 52-, while storage coil outlet conduit 50 is connected, through mated bores I04 and 106 (FIG. 3) in said upper and lower valve plates, to system fluid discharge conduit 74.
  • fluid inlet conduit 64 is connected, through elongate grooves 108 and 110 in the lower valve plate 26 and bores 86 and 82 in the upper valve plate 28, respectively, to the storage coil inlet conduits 38 and 42; while fluid outlet conduit 66 is connected, through elongate grooves 112 and 114 in said lower valve plate and bores 84 and 78 in said upper valve plate, respectively, to the storage coil outlet conduits 40 and 44.
  • no connections are made to the storage coil set 39. or
  • OPERATION For use, for example, in the successive supply of portions of extremely corrosive industrial fluid samples in the nature ofa solution of approximately percent sulfuric acid, 5 percent sodium dichromate and I5 percent water from the sample cups 14 of the sample supply device 10 through system fluid discharge conduits 72 and 74 at substantially constant flow rate to automatic, sequentially operable fluid sample analysis means in the nature, for example, of those shown and described in U.S. Pat. No. 3,241,432 issued Mar. 22, I966 to Leonard T.
  • each of the pilot fluid inlet conduits 68 and 70 would be connected to a source of a suitably inert pilot fluid which may be either a gas, or a liquid in the nature, for example, of silicone oil, under suitable pressure to supply the same to the system of the invention at a predetermined, substantially constant flow rate.
  • a suitably inert pilot fluid which may be either a gas, or a liquid in the nature, for example, of silicone oil, under suitable pressure to supply the same to the system of the invention at a predetermined, substantially constant flow rate.
  • vacuum pump means 62 would be sized at predetermined pumping capacity to providc, in conjunction with the fluid flow characteristics of the high-flow resistance coil 60, for a substantially constant fluid flow rate through outlet conduit 58.
  • valve operating means 30 would, of course, be
  • valve operating means 30 and sample supply device 10 will be programmed to retain the system in this condition for a period of time sufficient to insure that the said storage coils are each full of said fluid sample, with any excess of the latter as may be thusly aspirated being pumped to waste through conduit 58 as indicated in the drawings.
  • valve operating means 30 will be effective to shift the system of the invention to the condition thereof depicted in FIG. 3 wherein the offtake tube 20 will be disposed in the wash liquid reservoir 22 and the upper valve plate 28 will have been rotated through approximately in the counterclockwise direction to align upper valve plate bores 86, 84, 82 and 78 with lower valve plate elongate grooves 108, 112, and 114, respectively.
  • pressurized air from fluid inlet conduit 64 will be introduced to the upstream ends of the respective fluid sample portions stored in storage coils 34 and 36 to form air bubbles thereat, while the fluid sample portion volumes displaced thereby will be flowed as indicated to waste through fluid outlet conduit 66.
  • Valve operating means 30 is effective to shift the upper plate 28 from the position of FIG. 3 toward the position of FIG. 4, breaking outlet connections 112, 114 from storage coils 34, 36, after a suitable volume of air has been added to the respective coils 34, 36, thereby preventing an undesirable degree of drainage of the sample from the last'mentioned coils through the outlet 66.
  • valve operating means 30 may be programmed to momentarily halt the upper valve plate 28 in the FIG. 3 position thereof or, alternatively, the same may be maintained in motion with the generally elongate extent of the respective lower valve plate grooves I08, H2, H0 and 114 being relied upon to provide a sufficient period of airbubble formation time. Simultaneously, it may be understood that sample supply device will be effective to advance the second sample supply cup 14b into operative position relative to the offtake tube assembly 18.
  • wash liquid will be aspirated from wash liquid container 22 by offtake tube for flow, through the operation of vacuum pump means 62, through conduit 12, storage coils 46 and 48, to and through the fluid outlet conduit 58 for discharge to waste to thus thoroughly cleanse the said storage coils.
  • operation of the sample supply device 10 will be effective to move offtake tube 20 from the wash liquid reservoir 22 to the second sample supply cup 14b to commence the aspirationas preceded by a slug of air aspirated during the travel of the inlet end of the said offtake tube through the ambient air-of the fluid sample from sample cup 14b into the storage coils 46 and 48 to fill the same in the manner described hereinabove with regard to the filling of storage coils 34 and 36 with the fluid sample from the first sample cup l4a.
  • wash liquid will be aspirated from container 22 for flow through conduit 12 and storage coils 34 and 36 to thoroughly cleanse the said storage coils by removing any and all traces of the sample portions from the first sample cup 140, as well as the silicone oil pilot fluid which now substantially fills the same, therefrom, and, through outlet conduit 58 and vacuum pump means 62 to waste.
  • operation of the sample supply device 10 will be effective to move offtake tube 20 from the wash liquid container 22 to the now operatively positioned third sample cup to commence the filling of the storage coils 34 and 36 with portions of the fluid sample therefrom in the manner described.
  • Operation of the system ofthe invention may be understood to continue in this manner until portions of the fluid samples from each of the sample cups 14 on the turntable 16 have been supplied, at substantially constant flow rate, to the nonil-- lustrated, connected fluid sample analysis means through system discharge conduits 72 and 74.
  • the operational rate of the system of the invention may, of course, be widely varied, it may be understood that in a currently proposed embodiment thereof the upper valve plate 28 is arrange to make 1 complete revolution per minute to result in the provision, once steady state operational conditions are reached, of two distinct portions of each of 12 fluid samples per hour on system fluid discharge conduits 72 and Although disclosed in detail for use in the supply at substan tially constant flow rate of extremely corrosive industrial fluid samples in the nature of a sulfuric acid-sodium dichromate-' water solution to fluid sample analysis means, it is believed clear that the system of the invention would be equally useful in the supply of less corrosive fluid samples in the nature, for example, of fluid solvents to such analysis means.
  • the system of the invention is also well suited for the supply of noncorrosive fluid samples in the nature, for example, of blood serum samples to blood sample analysis means. ln such latter instance, it may be understood that the vacuum pump means 62 and the associated high-flow resistance coil 60 would preferably be replaced by peristaltic pump means as discussed hereinabove which would automatically provide for the desired substantially constant flow rate through fluid outlet conduit 58, there being no concern in such instance for corrosion and resultant failure of the compressible pump tubes of such peristaltic pump means.
  • the respective upper and lower valve plates of the shear valve 24 would be made of any a Although specifically disclosed as incorporating only two storage coils and associated conduits per storage coil set, it is believed clear that more or less of said storage coils and associated conduits could be provided per storage coil set through the formation of more or less upper and lower valve body bores and elongate grooves. Too, it is believed clear that more or less of said storage coil sets may he provided through appropriate changes in the programming of the sample supply device and valve operating means 30 respectively.
  • a flow regulation system for supplying fluid samples at substantially constant flow rate comprising, sample storage means, means to pump said samples into said storage means, means to pump said samples out of said sample storage means for supply at substantially constant flow rate, sample storage means transfer means for transferring said sample storage means between operative connection with said means to pump said samples into said sample storage means and said means to pump said samples from said sample storage means, and means to introduce a bubble of air to said samples stored in said sample storage means during the transfer of the sample storage means by said sample storage means transfer means between operative connection with said means to pump samples into said sample storage means and said means to pump said samples from said sample storage means.
  • said sample storage means transfer means comprise shear valve means having relatively movable valve plates with matable sample flow passages formed therein, said valve plates being arranged to provide, in a first relative position thereof, a flow passage through mated sample flow passages between a source of supply of said samples, said sample storage means, and said means to pump said samples into said sample storage means, respectively, and being arranged to provide, in a second relative position thereof, a flow passage through mated sample flow passages between said sample storage means and said means to pump said samples from said sample storage means.
  • a flow regulation system as in claim 2 further comprising, additional matable flow passages formed in said relatively movable valve plates, said valve plates being arranged to provide, in a third relative position thereof intermediate said first and second relative positions thereof, a flow passage through mated sample flow passages between a source of compressed air and said sample storage means to supply said bubble of air to said sample stored in said sample storage means.
  • said means to pump said samples out of said sample storage means comprise means to introduce a pilot fluid at substantially constant flow rate to said sample storage means to displace said fluid samples from said sample storage means for supply at a correspondingly, substantially constant flow rate.
  • said means to pump said samples into said sample storage means comprise means to draw said samples into said sample storage means from a source ofsupply ofsaid samples.
  • valve plates are arranged to provide, in a third relative position thereof intermediate said first and second relative positions thereof, a flow passage through mated sample flow passages between a source of compressed air and said sample storage means to supply said bubble of air to said sample stored in said sample storage means.
  • said means to pump said samples into said sample storage means comprise means to draw said samples into said sample storage means from a source of supply of said samples.
  • said means to pump said samples into said sample storage means comprise means to draw said samples into said sample storage means from a source of supply of said samples.
  • said means to pump said samples out of said sample storage means comprise means to introduce a pilot fluid at substantially constant flow rate to said sample storage means to displace said fluid samples from said sample storage means for supply at a correspondingly, substantially constant flow rate.
  • said means to pump said samples into said sample storage means comprise means to draw said samples into said sample storage means from a source of supply of said samples.
  • sample storage means comprise first sample storage means and second sample storage means, respectively, and said sample storage means transfer means are operable to simultaneously operatively connect said first sample storage means to said means to pump said samples into said sample storage means, and to operatively connect said second sample storage means to said means to pump said samples out of said sample storage means at substantially constant flow rate.
  • said sample storage means transfer means comprise shear valve means having relatively movable valve plates with matable sample flow passages formed therein, said valve plates being arranged to provide, in a first relative position thereof, a flow passage through mated sample flow passages between a source of supply of said samples, said sample storage means, and said means to pump said samples into said sample storage means, respectively, and being arranged to provide, in a second relative position thereof, a flow passage through mated sample flow passages between said sample storage means and said means to pump said samples from said sample storage means.
  • said means to pump said samples out of said sample storage means comprise means to introduce a pilot fluid at substantially constant flow rate to said sample storage means to displace said fluid samples from said sample storage means for supply at a correspondingly, substantially constant flow rate.
  • a flow regulation system for supplying fluid samples at substantially constant flow rate comprising, sample storage means, means to pump said samples into said sample storage means, means to pump said samples out of said sample storage means for supply at substantially constant flow rate, and sample storage means transfer means for transferring said sample storage means between operative connection with said means to pump said samples into said sample storage means and said means to pump said samples from said sample storage means, said sample storage means comprising sample storage means for a first portion of said samples and sample storage means for a second portion of said samples, and said sample storage means transfer means being operable to simultaneously and independently operatively connect said sample storage means for a first portion of said samples and said sample storage means for a second portion of said samples to said means to pump said samples from said sample storage means whereby, said first and second portions of said samples may be simultaneously and independently pumped from said sample storage means at substantially constant flow rate.
  • sample storage means comprise first sample storage means and second sample storage means, respectively
  • sample storage means transfer means are operable to simultaneously operatively connect said first sample storage means to said means to pump said samples into said sample storagemeans to pump said samples into said sample storage means, respectively, and being arranged to provide, in a second relative position thereof, a flow passage through mated sample flow passages between said sample storage means and said means to pump said samples from said sample storage means.
  • said means to pump said samples out of said sample storage means comprise means to introduce a pilot fluid at substantially constant flow rate to said sample storage means to displace said fluid samples therefrom for supply at a correspondingly, substantially constant flow rate.

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  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
US835073A 1969-06-20 1969-06-20 Flow regulation system utilizing shear valve and pilot fluid Expired - Lifetime US3583232A (en)

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US83507369A 1969-06-20 1969-06-20

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US (1) US3583232A (de)
JP (1) JPS5014555B1 (de)
BE (1) BE752267A (de)
CH (1) CH520329A (de)
DE (1) DE2028929C3 (de)
FR (1) FR2052819A5 (de)
GB (1) GB1265139A (de)
NL (1) NL7008280A (de)
SE (1) SE377379B (de)
SU (1) SU362545A3 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558520A1 (de) * 1975-04-02 1976-10-14 Technicon Instr Verfahren und vorrichtung zum proportionieren von fluessigkeiten
US4009999A (en) * 1975-05-29 1977-03-01 Technicon Instruments Corporation Reagent supply control in automated fluid analysis
US4108602A (en) * 1976-10-20 1978-08-22 Hanson Research Corporation Sample changing chemical analysis method and apparatus
DE3238714A1 (de) * 1981-10-19 1983-04-28 Coulter Electronics, Inc., 33010 Hialeah, Fla. Ventilanordnung zur dosierung und zum transport von fluessigkeiten
EP0081116A1 (de) * 1981-11-20 1983-06-15 Hitachi, Ltd. Verfahren und Vorrichtung zur kontinuierlichen Durchflussanalyse flüssiger Proben
US4517302A (en) * 1982-11-15 1985-05-14 Technicon Instruments Corporation Continuous flow metering apparatus
US4726237A (en) * 1985-06-19 1988-02-23 Sequoia-Turner Corporation Fluid metering apparatus and method
US4889692A (en) * 1984-11-05 1989-12-26 Holtzman Marc E Disposable sample preparation container
US4925628A (en) * 1986-12-16 1990-05-15 Ciba-Geigy Corporation Sample preparation chamber with mixer/grinder and sample aliquot isolation
US4980130A (en) * 1986-12-16 1990-12-25 Ciba-Geigy Corporation System for preparation of samples for analysis
DE4018928A1 (de) * 1990-06-13 1991-12-19 Bodenseewerk Perkin Elmer Co Vorrichtung zur eingabe von fluessigen proben in einen traegerfluessigkeitsstrom
EP0515658A1 (de) * 1990-12-13 1992-12-02 Coulter Corporation Ansaugverfahren für hämatologische analysevorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110686938B (zh) * 2019-11-11 2022-08-16 云南电网有限责任公司电力科学研究院 一种氢油取样装置及取样方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080759A (en) * 1958-12-19 1963-03-12 Exxon Research Engineering Co Sampling device
US3230776A (en) * 1963-05-31 1966-01-25 Technicon Instr Liquid sample supply apparatus
US3241432A (en) * 1962-01-23 1966-03-22 Technicon Instr Method and apparatus for sequentially performing analyses on a plurality of fluid samples
US3455817A (en) * 1968-07-31 1969-07-15 Abcor Inc Method of and apparatus for the recovery of fractions from chromatographic fractions
US3479880A (en) * 1967-11-03 1969-11-25 Philip Morris Inc Apparatus for delivering samples to a gas chromatograph
US3489011A (en) * 1966-12-02 1970-01-13 Distillers Co Yeast Ltd Sampling valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080759A (en) * 1958-12-19 1963-03-12 Exxon Research Engineering Co Sampling device
US3241432A (en) * 1962-01-23 1966-03-22 Technicon Instr Method and apparatus for sequentially performing analyses on a plurality of fluid samples
US3230776A (en) * 1963-05-31 1966-01-25 Technicon Instr Liquid sample supply apparatus
US3489011A (en) * 1966-12-02 1970-01-13 Distillers Co Yeast Ltd Sampling valve
US3479880A (en) * 1967-11-03 1969-11-25 Philip Morris Inc Apparatus for delivering samples to a gas chromatograph
US3455817A (en) * 1968-07-31 1969-07-15 Abcor Inc Method of and apparatus for the recovery of fractions from chromatographic fractions

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558520A1 (de) * 1975-04-02 1976-10-14 Technicon Instr Verfahren und vorrichtung zum proportionieren von fluessigkeiten
US4009999A (en) * 1975-05-29 1977-03-01 Technicon Instruments Corporation Reagent supply control in automated fluid analysis
US4108602A (en) * 1976-10-20 1978-08-22 Hanson Research Corporation Sample changing chemical analysis method and apparatus
DE3238714A1 (de) * 1981-10-19 1983-04-28 Coulter Electronics, Inc., 33010 Hialeah, Fla. Ventilanordnung zur dosierung und zum transport von fluessigkeiten
US4445391A (en) * 1981-10-19 1984-05-01 Coulter Electronics, Inc. Liquid metering and transfer valve assembly
EP0081116A1 (de) * 1981-11-20 1983-06-15 Hitachi, Ltd. Verfahren und Vorrichtung zur kontinuierlichen Durchflussanalyse flüssiger Proben
US4517302A (en) * 1982-11-15 1985-05-14 Technicon Instruments Corporation Continuous flow metering apparatus
US4889692A (en) * 1984-11-05 1989-12-26 Holtzman Marc E Disposable sample preparation container
US4726237A (en) * 1985-06-19 1988-02-23 Sequoia-Turner Corporation Fluid metering apparatus and method
US4925628A (en) * 1986-12-16 1990-05-15 Ciba-Geigy Corporation Sample preparation chamber with mixer/grinder and sample aliquot isolation
US4980130A (en) * 1986-12-16 1990-12-25 Ciba-Geigy Corporation System for preparation of samples for analysis
WO1990002934A1 (en) * 1988-09-06 1990-03-22 Holtzman Marc E Disposable sample preparation container and method of preparing samples for analysis
DE4018928A1 (de) * 1990-06-13 1991-12-19 Bodenseewerk Perkin Elmer Co Vorrichtung zur eingabe von fluessigen proben in einen traegerfluessigkeitsstrom
EP0515658A1 (de) * 1990-12-13 1992-12-02 Coulter Corporation Ansaugverfahren für hämatologische analysevorrichtung
EP0515658A4 (de) * 1990-12-13 1994-02-02 Coulter Corporation

Also Published As

Publication number Publication date
DE2028929C3 (de) 1974-09-05
NL7008280A (de) 1970-12-22
GB1265139A (de) 1972-03-01
SE377379B (de) 1975-06-30
BE752267A (fr) 1970-12-21
DE2028929B2 (de) 1974-02-07
JPS5014555B1 (de) 1975-05-28
SU362545A3 (de) 1972-12-13
FR2052819A5 (de) 1971-04-09
CH520329A (de) 1972-03-15
DE2028929A1 (de) 1971-01-14

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