EP0559223B1 - Module montable sur un distributeur de fluide dans une bouteille - Google Patents

Module montable sur un distributeur de fluide dans une bouteille Download PDF

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Publication number
EP0559223B1
EP0559223B1 EP93103598A EP93103598A EP0559223B1 EP 0559223 B1 EP0559223 B1 EP 0559223B1 EP 93103598 A EP93103598 A EP 93103598A EP 93103598 A EP93103598 A EP 93103598A EP 0559223 B1 EP0559223 B1 EP 0559223B1
Authority
EP
European Patent Office
Prior art keywords
bottle
piston
dosing device
housing
bevel gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93103598A
Other languages
German (de)
English (en)
Other versions
EP0559223A1 (fr
Inventor
Walter Lutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WALU-APPARATETECHNIK GmbH
Original Assignee
WALU-APPARATETECHNIK GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WALU-APPARATETECHNIK GmbH filed Critical WALU-APPARATETECHNIK GmbH
Publication of EP0559223A1 publication Critical patent/EP0559223A1/fr
Application granted granted Critical
Publication of EP0559223B1 publication Critical patent/EP0559223B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0203—Burettes, i.e. for withdrawing and redistributing liquids through different conduits
    • B01L3/0206—Burettes, i.e. for withdrawing and redistributing liquids through different conduits of the plunger pump type

Definitions

  • the invention relates to a bottle dosing device with a plug-on module.
  • Bottle dosing devices are already generally known.
  • the bottle dosing device described in DE-A-26 49 014 consists of a housing with a valve block which can be placed on a container in which the liquid to be dosed is located.
  • a cylinder is connected to the valve block, in which a piston is mounted so as to be longitudinally displaceable. Liquid is sucked in by an upward movement of the piston. The subsequent downward movement of the piston releases this liquid through an ejection cannula.
  • An intake valve and an exhaust valve are located in the valve block and control the intake and dispensing of the liquid accordingly.
  • the piston is connected to an outer sleeve spanning the cylinder.
  • the liquid volume to be aspirated and dispensed is set using an adjustable stop.
  • the liquid volume to be dosed can be set by the stop described. However, it is not possible to measure the volume of liquid actually dispensed. This can be achieved with a piston burette.
  • a piston burette is described for example in DE-C-35 01 909. It contains a valve block for placing on a container, which is firmly connected to the cylinder of the piston burette.
  • a piston for the metered delivery of liquid from the container is guided in a longitudinally displaceable manner in the cylinder.
  • the piston is for dispensing liquid displaceable from the container in the cylinder by means of a gearwheel which can be actuated by an operating button and a toothed rack. The relative movements between the piston and cylinder are measured.
  • the liquid quantities dispensed from the container can be read on an electronic digital display.
  • the object of the invention is to provide a way with which a bottle dosing device can be converted quickly and easily into a burette.
  • the housing of the plug-on module has locking elements for releasable locking with corresponding locking elements of the bottle dosing device.
  • the latching elements of the plug-on module preferably consist of projections which can be detachably connected to the corresponding latching elements of the bottle dosing device, preferably grooves. To make a burette from the bottle dosing device, the plug-on module is connected to the bottle dosing device.
  • the plug-on module or its housing is connected to the housing or the valve block of the bottle dosing device, that is to say to a part of the bottle dosing device which does not move during the movement of the piston, as a result of which the one known from DE-A-35 34 550 Device-related disadvantages can be avoided.
  • the driver of the plug-on module engages in an actuating part or adjusting slide which is connected to the piston of the bottle dosing device.
  • the actuating part or adjusting slide is preferably connected to the outer jacket of the bottle metering device, the outer jacket of the bottle metering device engaging over the cylinder of the bottle metering device and being connected to the piston. The connection of the plug-on module with the bottle dosing device can be released again.
  • the solution according to the invention makes it possible to use a bottle dosing device easy and quick to convert into a burette.
  • the burette created in this way has the further advantage that it can be sterilized.
  • the plug-on module including any electronics connected to it, is removed.
  • the bottle dosing device can then be sterilized.
  • the plug-on module can then be connected again to the bottle dosing device in order to create a burette again.
  • the driver of the plug-on module is operatively connected to the corresponding actuating part or adjusting slide of the bottle dosing device, for example by the driver engaging in the actuating part or the adjusting slide.
  • the actuating part or the adjusting slide of the bottle dosing device executes a longitudinal movement, so that the driver of the plug-on module must also perform a corresponding longitudinal movement.
  • the actuating part of the bottle dosing device performs a rotary movement. Then the driver of the plug-on module must also be able to perform a corresponding rotary movement.
  • the plug-on module according to the invention can be used advantageously in particular if the piston of the bottle dosing device is connected to a sleeve which preferably overlaps the cylinder of the bottle dosing device.
  • the actuating part or the adjusting slide of the bottle dosing device can be longitudinally displaceable and lockable.
  • the actuating part or the adjusting slide of the bottle dosing device can be a preferably adjustable stop for the piston stroke of the bottle dosing device.
  • the invention creates the possibility of operating a bottle dosing device in two different ways: on the one hand, the dosing operation normally provided for the bottle dosing device can be carried out.
  • the volume of liquid to be dispensed is adjusted, that is to say predefined, and then dispensed by means of a preferably adjustable stop.
  • the plug-on module can be connected to the bottle dosing device. Then the bottle dosing device has become a burette that can be used for titration.
  • the dispensed and measured liquid volume is also displayed by a suitable display device.
  • a measuring device is preferably provided for measuring the displacement path of the driver.
  • a display device for displaying the displacement path of the driver is also connected to this measuring device. With the displacement of the driver, the displacement of the piston and thus the volume of liquid dispensed is measured and displayed. If the driver does not perform a longitudinal movement but a rotary movement, the angle of rotation of the driver and thus the displacement path of the piston and thus also the volume of liquid dispensed is measured and displayed.
  • a threaded spindle can be rotatably mounted in the housing of the plug-on module, into which a threaded nut connected to the driver engages.
  • the threaded nut can be integrally connected to the driver.
  • the threaded spindle preferably has a first bevel gear, in which a second bevel gear engages. By rotating the second bevel gear, the first bevel gear and with it the threaded spindle are rotated.
  • the axis of rotation of the second bevel gear preferably runs at right angles to the axis of rotation of the first bevel gear and thus also to the axis of rotation of the threaded spindle.
  • the second bevel gear can be connected to a handwheel and / or to a motor.
  • the threaded spindle preferably has a rotary encoder which can be scanned by a scanner connected to the housing of the plug-on module. In this way, the rotation of the threaded spindle and thus the stroke of the piston can be measured particularly easily and reliably.
  • a further advantageous development is characterized in that the housing of the plug-on module has latching elements, preferably projections, for releasable latching with corresponding latching elements, preferably grooves, of the bottle dosing device.
  • the bottle dosing device generally has a housing with a valve block, in which an intake line and a discharge line (pressure line) are located, as well as a suction valve and a pressure valve.
  • An actuating part can be connected to the piston, which is preferably longitudinally displaceable and lockable and can thus form a preferably adjustable stop.
  • the bottle dosing device provided with the reference number 1 consists of a valve block 2, which is provided with an ejection cannula 3, and an upward-pointing cylinder, in which a piston is guided in a longitudinally displaceable manner.
  • the piston is connected to an outer sleeve 4 which engages over the cylinder.
  • the outer sleeve 4 is preferably connected in one piece to a knob 6 at its upper end.
  • the plug-on module designated overall by 7, has a housing 8 which can be detachably connected to the bottle dosing device 1.
  • a driver 9 is guided in a longitudinally displaceable manner.
  • the housing 8 has parallel, spaced bearing blocks 10, in which a threaded spindle 11 is rotatably mounted.
  • the driver 9 has an extension 13 which engages in the groove formed by two spaced, parallel projections 14, whereby the extension 13 and thus the driver 9 is secured against rotation and reliably guided.
  • the driver 9 has two spaced-apart projections 15 which surround the part of the adjusting slide 5 which projects beyond the outer jacket of the outer sleeve.
  • the threaded spindle 11 has at its lower end below the lower bearing block 10 a first bevel gear 16 aligned with the threaded spindle 11, which engages in a second bevel gear 17, the axis of rotation 18 of which runs at right angles to the axis of rotation 19 of the first bevel gear 16 and thus also the threaded spindle 11 .
  • the second bevel gear 17 is connected to handwheels 20 provided on both sides of the housing 8.
  • a motor (not shown in the drawings), preferably an electric motor, can be provided for driving the second bevel gear 17.
  • the threaded spindle 11 has at its upper end above the upper bearing block 10 a rotary encoder 21 which can be scanned by a scanner 22 connected to the housing 8.
  • the rotary encoder 21 can be designed as a grid disk.
  • An embodiment is given in DE-A-38 18 531.
  • the scanner 22 can be configured as a fork light barrier. However, it is also possible to use other scanning elements, for example magnetic scanning elements.
  • the angle of rotation can be detected by pulse sampling and counting.
  • the housing 8 has at its lower end as projections 23 (FIG. 5) locking elements for releasable locking with locking elements designed as grooves 24, which are provided in the area of the valve block of the bottle dosing device 1. Furthermore, an axial safety catch 26 preloaded by a compression spring 25 is provided at the lower end of the housing 8, which engages behind a projection at the lower end of the valve block of the bottle dosing device 1 and at its lower end has a grooved grip strip 27 projecting downward from the housing 8 having.
  • the plug-on module 7 (FIGS. 1 and 2) is plugged onto the bottle dosing device 1 (FIG. 3) in the manner shown in FIGS. 4 to 8. It is secured in this position by the projections 23 of the plug-on module 7 which engage in the grooves 24 of the bottle dosing device 1 (FIG. 5).
  • the setting slide 5 When the plug-on module 7 is plugged onto the bottle dosing device 1, the setting slide 5 is in the basic position shown in FIG. 3. The setting slide 5 is therefore on the same side as the ejection cannula 3. It is also in its lowest position, and is therefore set to the maximum volume.
  • the outer sleeve 4 is rotated by its rotary knob 6 by 180 degrees. Then the adjusting slide 5 engages between the projections 15 of the driver 9 without play; the connection between the driver 9 and the setting slide 5 (and thus - via the outer sleeve 4 - the piston) is established.
  • the driver 9 and with it the adjusting slide 5 and the piston of the bottle dosing device can be moved axially.
  • the stroke movement of the piston can be measured and evaluated exactly. This is preferably done by electronics connected to the rotary encoder 21 and the scanner 22.
  • the amount of liquid dispensed and measured can preferably be displayed digitally.
  • a bottle dosing device can be quickly and easily converted into a burette.
  • the bottle dosing device which can also be referred to as a bottle dispenser, is autoclavable (sterilizable).
  • the plug-on module 7 has to be removed from the bottle dosing device 1 again. This is done in that the axial safety catch 26 is moved away from the projection on the valve block against the force of the compression spring 25 by an attack on the grip strip 27; the plug-on module 7 can then be removed from the bottle dosing device 1 by releasing the latching between the projections 23 and the grooves 24.

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Devices For Use In Laboratory Experiments (AREA)

Claims (7)

  1. Distributeur de fluide dans une bouteille (1) pour distribuer un liquide à partir d'un réservoir, comportant un cylindre et un piston guidé à l'intérieur, mobile en sens longitudinal, ainsi qu'un module montable (7), comportant un boîtier (8) qui est raccordé de manière à pouvoir être détaché au distributeur de fluide dans une bouteille (1), un dispositif entraîneur (9) pour déplacer le piston étant guidé de manière mobile en sens longitudinal dans le boîtier (8)
    caractérisé en ce que le boîtier (8) du module montable (7) présente des éléments d'encliquetage, de préférence des salles (23) pour l'encliquetage séparable avec des éléments d'encliquetage correspondants, de préférence des rainures (24) du distributeur de fluide dans une bouteille (1).
  2. Distributeur de fluide dans une bouteille selon la revendication 1, caractérisé par un dispositif de mesure pour mesurer la course de déplacement du dispositif entraîneur.
  3. Distributeur de fluide dans une bouteille selon les revendications 1 ou 2, caractérisé en ce qu'une broche filetée (11) est logée de manière à pouvoir pivoter dans le boîtier (8), broche filetée dans laquelle s'engage un écrou fileté (12) raccordé au dispositif entraîneur (9).
  4. Distributeur de fluide dans une bouteille selon la revendication 3, caractérisé en ce que la broche filetée (11) présente une première roue conique (16) dans laquelle s'engage une seconde roue conique (17) dont l'axe de pivotement (18) s'étend de préférence à angle droit par rapport à l'axe de pivotement (19) de la première roue conique (16).
  5. Distributeur de fluide dans une bouteille selon la revendication 4, caractérisé en ce que la seconde roue conique (17) est raccordée à un volant à main (20) et/ou à un moteur.
  6. Distributeur de fluide dans une bouteille selon les revendications 3 à 5, caractérisé en ce que la broche filetée (11) présente un transducteur rotatif (21) qui peut être palpé à l'aide d'un palpeur (22) raccordé au boîtier (8).
  7. Distributeur de fluide dans une bouteille selon l'une quelconque des revendications précédentes, caractérisé en ce que le piston est raccordé à un manchon (4) entourant le cylindre.
EP93103598A 1992-03-06 1993-03-05 Module montable sur un distributeur de fluide dans une bouteille Expired - Lifetime EP0559223B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9202990U DE9202990U1 (de) 1992-03-06 1992-03-06 Aufsteckmodul für ein Flaschendosiergerät
DE9202990U 1992-03-06

Publications (2)

Publication Number Publication Date
EP0559223A1 EP0559223A1 (fr) 1993-09-08
EP0559223B1 true EP0559223B1 (fr) 1997-05-02

Family

ID=6876935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103598A Expired - Lifetime EP0559223B1 (fr) 1992-03-06 1993-03-05 Module montable sur un distributeur de fluide dans une bouteille

Country Status (2)

Country Link
EP (1) EP0559223B1 (fr)
DE (2) DE9202990U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513023C2 (de) * 1995-04-06 1997-06-12 Hirschmann Glasgeraete Dosiergerät
DE10106463A1 (de) * 2001-02-13 2002-08-14 Hirschmann Laborgeraete Gmbh Digitalbürette und Verfahren zum Anzeigen des Dosiervolumens einer solchen Digitalbürette
US8142738B2 (en) 2006-12-07 2012-03-27 Brand Gmbh + Co Kg Bottle top dispenser for handling liquids
US8597593B2 (en) 2006-12-07 2013-12-03 Brand Gmbh + Co Kg Bottle top dispenser for handling liquids

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412295A (en) * 1944-08-07 1946-12-10 California Inst Res Found Microburet
FR1193899A (fr) * 1958-03-27 1959-11-05 Commissariat Energie Atomique Perfectionnements apportés aux instruments, du genre des pipettes, permettant de doser de faibles quantités de liquides
DE1909540A1 (de) * 1969-02-26 1970-09-17 Dibbern Dr Rer Nat Hans Werner Mikrodosiereinrichtung
DE2649014A1 (de) * 1976-10-28 1978-05-03 Brand Fa Rudolf Verduennungs- und pipettiergeraet
FR2362371A1 (fr) * 1976-08-18 1978-03-17 Marteau Autry Eric Dispositif distributeur de volumes reglables de liquide
ATE32666T1 (de) * 1982-06-04 1988-03-15 Brand Rudolf Gmbh & Co Flaschenaufsatzkolbenbuerette.
DE3501909C1 (de) * 1985-01-22 1986-07-10 Witeg-Glasgeräte Helmut Antlinger KG, 6980 Wertheim Kolbenbürette
DE3516596A1 (de) * 1985-04-02 1986-10-02 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Praezisionsdosiergeraet mit digitaler anzeigevorrichtung
DE3534550A1 (de) * 1985-04-02 1986-10-09 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Praezisionsdosiergeraet mit digitaler anzeigevorrichtung
DE3730010A1 (de) * 1986-11-10 1988-05-11 Hans Steinhagen Handbetaetigte dosiervorrichtung mit schrittschaltwerk
DE3818531A1 (de) * 1988-05-31 1989-12-07 Walu Apparatetechnik Gmbh Kolbenbuerette

Also Published As

Publication number Publication date
EP0559223A1 (fr) 1993-09-08
DE9202990U1 (de) 1992-08-06
DE59306307D1 (de) 1997-06-05

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