[go: up one dir, main page]

EP0345527B1 - Auxiliary suction device for taking liquids from deep voluminous vessels - Google Patents

Auxiliary suction device for taking liquids from deep voluminous vessels Download PDF

Info

Publication number
EP0345527B1
EP0345527B1 EP89109287A EP89109287A EP0345527B1 EP 0345527 B1 EP0345527 B1 EP 0345527B1 EP 89109287 A EP89109287 A EP 89109287A EP 89109287 A EP89109287 A EP 89109287A EP 0345527 B1 EP0345527 B1 EP 0345527B1
Authority
EP
European Patent Office
Prior art keywords
tube
vessel
bowl
sucking device
liquid
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
EP89109287A
Other languages
German (de)
French (fr)
Other versions
EP0345527A2 (en
EP0345527A3 (en
Inventor
Heinz-Jürgen Gora
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.)
Eppendorf SE
Original Assignee
Eppendorf Netheler Hinz 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 Eppendorf Netheler Hinz GmbH filed Critical Eppendorf Netheler Hinz GmbH
Priority to AT89109287T priority Critical patent/ATE86143T1/en
Publication of EP0345527A2 publication Critical patent/EP0345527A2/en
Publication of EP0345527A3 publication Critical patent/EP0345527A3/en
Application granted granted Critical
Publication of EP0345527B1 publication Critical patent/EP0345527B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B01L3/0289—Apparatus for withdrawing or distributing predetermined quantities of fluid
    • B01L3/0293—Apparatus for withdrawing or distributing predetermined quantities of fluid for liquids
    • 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
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids

Definitions

  • a repeating pipette on which a suction device provided with a piston with a conical suction piece is to be arranged.
  • the piston can be moved back and forth in a cylinder of the suction device, so that liquids can be sucked in when the piston is withdrawn and dispensed when the piston is advanced.
  • the use of such a syringe-like suction device in conjunction with a repeating pipette is used in laboratory operation to remove liquids from a vessel and dispense them in a metered manner.
  • the liquids are usually organic and inorganic liquids, solvents, acids, alkalis and reagents, the volume of liquid drawn being in the ml order.
  • bottle dispensers are known, with which can be conveyed into an open additional vessel, with which liquid can then be removed. The handling of such bottle dispensers is cumbersome; they are also complex and expensive.
  • the invention has for its object to provide a suction aid for a piston-provided suction device with a suction piece for removing liquid from a vessel that is so deep that the bottom of the vessel cannot be reached with the suction piece.
  • a suction aid for a piston-provided suction device with a suction piece for removing liquid from a vessel that is so deep that the bottom of the vessel cannot be reached with the suction piece.
  • the suction aid provided according to the invention prevents the liquid from being transferred from the deep vessel into a flat vessel, which would be problematic in particular when processing aggressive substances.
  • constant handling should be made possible while maintaining the same suction conditions.
  • a device in which a liquid can be removed from a vessel by means of a suction device provided with a piston via a housing forming a removal chamber, a check valve and a tube.
  • a suction aid for a separate suction device such as a pipette or pipetting device.
  • it is a conveying device for a liquid dilution system, in which the suction device is attached in one piece to the removal chamber and the housing forming the removal chamber is arranged locally separated from the vessel.
  • Dosing devices are known from DE-U-19 54 583, GB-A-950,304 and DE-A-32 04 118, in which liquid is conveyed from a vessel into an intermediate chamber via a tube in order to be dispensed from there . In these metering devices, however, the liquid is conveyed upwards through the tube by manually compressing the elastic vessel.
  • the suction aid designed according to the invention allows liquid to be removed from a vessel that is too deep for the suction piece of a separate suction device such as a pipette or pipetting device.
  • the housing forming the removal chamber is used for liquid removal placed on the vessel, the tube being immersed in the vessel, expediently up to just above the bottom thereof; then the suction piece of the separate suction device is inserted sealingly into the inlet opening of the housing. If the piston of the suction device is now pulled upwards in a suction stroke, the vacuum generated in this way draws liquid from the vessel through the pipe into the removal chamber and from there into the suction device.
  • the removal chamber is connected on the one hand via the tube to the interior of the vessel and on the other hand via the inlet opening to the suction device, but is otherwise closed to the environment.
  • the check valve ensures that liquid that has entered the tube and the removal chamber during a suction stroke cannot flow back into the vessel.
  • the removal chamber is expediently filled with the liquid up to a level determined by the lower end of the suction piece. Then, with the suction device in the form of a pipette or pipetting device, liquid can be withdrawn continuously from the intermediate volume formed in the removal chamber, which is continuously topped up via the tube, so that the level of the liquid in the removal chamber remains practically constant.
  • a larger-volume suction device can be used once for the safe filling of the removal chamber.
  • the suction aid designed according to the invention is structurally simple and reliable. In particular, it makes expensive bottle dispensers or the like superfluous. Also a casting the liquid from the deep vessel into a flat vessel is no longer required.
  • the housing consists of a lower housing shell and an upper housing shell, which are tightly connected to one another.
  • the upper mouth of the tube or a tubular extension receiving the tube is arranged near the top wall of the upper housing shell.
  • the upper mouth thus forms an overflow for the liquid in the interior of the removal chamber, the level of the liquid located in the removal chamber being formed as a function of the respective immersion depth of the suction piece. In any case, this level is below the upper mouth of the tube or the tubular extension, while above the level of the liquid, the housing is filled with air.
  • the suction aid shown has a housing 1. This consists of a lower housing shell 2 and a liquid-tight flange-mounted upper housing shell 3. The interior between the two housing shells 2 and 3 forms a removal chamber 4. A tube 5 projects downward from the lower housing shell 2.
  • the lower housing shell 2 is arranged on the edge 6 of the mouth of a vessel 7 designed as a bottle.
  • a vessel 7 designed as a bottle.
  • liquid 8 with a level 9 which decreases with increasing liquid withdrawal.
  • the tube 5 extends to the bottom 10 of the vessel 7 and has circumferentially distributed, upwardly directed incisions 11. According to another embodiment, the tube 5 is so short that it ends above the bottom 10. This arrangement has the purpose of being able to remove liquid from the vessel 7 as long as there is still liquid in the vessel 7.
  • the housing 1 has an inlet opening 13 in the upper housing shell 3, specifically in the top wall 12.
  • the conical suction piece 14 of a syringe-like suction device 15, which is arranged on a pipette device or a repeating pipette, can be inserted through the inlet opening 13.
  • the inlet opening 13 is correspondingly conical and in this respect forms a sealing cone for the conical suction piece 14, which thus projects with its lower end to a certain depth into the removal chamber 4.
  • the tube 5 can be formed in one piece with the lower housing shell 2. Its mouth lies just below the top wall 12.
  • a tubular extension 17 is formed in the lower housing shell 2, which extends up to just below the top wall 12 and emerges downward from the bottom 18 of the lower housing shell 2 and has inwardly directed sealing projections 19.
  • the tube 5 is inserted liquid-tight. Its depth of use can be set within limits, depending on how far the tube 5 is inserted into the tubular extension 17.
  • the tubular extension 17 has, below its upper mouth 16, an inwardly, upwardly concave, shell-like profile 20 with a central passage 21.
  • the upper side forms a valve seat 22 for a spherical valve body 23, which seals the interior of the tube 5, if one follows suction force directed downwards or a pressure force directed from above occurs.
  • a floating out of the valve body 23 from the mouth 16 is prevented by an extension 25 projecting into the mouth 16 on the top wall 12 of the housing.
  • the top wall 12 can also serve directly as a stop for the valve body 23 in order to hold it in the tubular extension 17 above the valve seat 22.
  • the suction piece 14 of the suction device 15 is inserted into the inlet opening 13.
  • a negative pressure is created in the removal chamber 4, through which liquid 5 is sucked out of the vessel 7 via the tube 5.
  • the valve body 23 lifts from its seat 22, and the liquid rises through the tube 5 and flows from the upper mouth 16 into the removal chamber 4.
  • the first suction stroke of the suction device 15 is not sufficient to fill the removal chamber with liquid up to the level 24 and also to draw liquid into the suction device 15, then a second or several suction strokes would have to take place.
  • the pressure stroke directed into the removal chamber 4 then ensures that the valve body 23 is pressed against its valve seat 22 and thus the tube 5 remains filled with liquid. Accordingly, the level 24 is maintained once it is reached. The resulting overpressure in the removal chamber 4 is relieved by a vent valve 45.
  • vent valve 45 can, however, be avoided if, after the first suction stroke, the suction piece 14 of the suction device 15 is removed from the inlet opening 13 and then the piston of the suction device 15 is returned to its starting position in a pressure stroke.
  • FIG. 2 shows a corresponding embodiment with the same reference numerals, but the check valve with the valve body 23 'is arranged at the lower end of the tube 5.
  • the valve body 23 ' is arranged in an attachment piece 27 which has lateral openings 28 for the entry of the liquid.
  • the top piece 27 can be removed, so that the length of the tube 5 can also be adapted to the depth of the vessel in this embodiment.
  • a valve seat 35 for the valve body 23 ' created above the openings 28 by tapering the attachment piece 27, which has enough space within the attachment piece 27 and below the lower tube end to lift off.
  • the tubular extension 17 arranged on the lower housing shell 2 is connected to the tube 5 by a close fit. In this context, too, there is a possibility of adjustment given to the bottle depth by pushing the tube 5 differently into the tubular extension 17.
  • the lower level 24 is shown as the minimum level corresponding to a maximum length of the extension 14. Furthermore, an upper level 29 below the upper mouth 16 of the tube 5 is indicated corresponding to a minimum length of the extension piece 14.
  • FIG. 3 shows a top view of the inlet opening 13. It has a flange-like edge 30 and is penetrated on the inside by a seal 31 in the form of a membrane which has star-shaped incisions 32, 33 and 34 extending from its center.
  • a seal 31 in the form of a membrane which has star-shaped incisions 32, 33 and 34 extending from its center.
  • a shell 40 is provided which is open at the top. From it, the downward tube 5 starts.
  • the check valve with the valve seat 22 and the spherical valve body 23 is located below a conical or conical wall part 41 of the shell 40 and below a central through opening 37.
  • the shell 40 has a slightly conical connecting piece 39, which goes down from the through opening 37 and in which the check valve 22, 23 is arranged.
  • the tube 5 is pushed onto this connection piece 39 in a sealing manner.
  • an insert 42 which is adapted to the respective wall parts is arranged. It forms a sealing seat for the suction piece 14 of the suction device 15 provided with a piston.
  • the lower edge 43 of the insert 42 also forms an abutment or a holding element for the valve body 23 if it floats. Its diameter is larger than the passage diameter of the lower edge 43.
  • connection piece 39 The space formed by the connection piece 39, the valve 22, 23 and the insert 42 forms the removal chamber 4, via which liquid can be sucked out of the tube 5 into the suction piece 14 of the suction device 15.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

For taking liquids from deep voluminous vessels by aspiration containers with short suction pieces, a metered intermediate volume of liquid, accessible from above, is aspirated from a liquid volume of changing depth in the vessel. Simultaneously with this aspiration, a defined sample of liquid is sucked off. This suction aid possesses a tube which can be introduced into the vessel and a non-return valve closing towards the lower tube end. This tube (5) is arranged on a dish (2) which can be placed upon the mouth (6) of the vessel. Preferably, the dish (2) is part of a housing (1) in which the upper opening (16) of the tube (5) is arranged close to the cover wall (12) and, in the upper part of the dish (2), above the intermediate volume of the liquid held at least in the dish (2), there is an inlet opening (13) for the tip (14) of a working vessel (15) provided with a piston. With each sampling, an intermediate volume of defined depth is always produced in the housing. <IMAGE>

Description

Aus der DE-C-2,926,691 ist eine Repetierpipette bekannt, an der eine mit einem Kolben versehene Ansaugeinrichtung mit einem konischen Ansaugstück anzuordnen ist. Der Kolben ist in einem Zylinder der Ansaugeinrichtung hin- und herbewegbar, so daß Flüssigkeiten beim Zurückziehen des Kolbens angesaugt und beim Vorschieben des Kolbens abgegeben werden können. Die Verwendung einer derartigen spritzenartigen Ansaugeinrichtung in Verbindung mit einer Repetierpipette dient im Laborbetrieb dazu, Flüssigkeiten aus einem Gefäß zu entnehmen und dosiert abzugeben. Bei den Flüssigkeiten handelt es sich üblicherweise um organische und anorganische Flüssigkeiten, Lösungsmittel, Säuren, Laugen und Reagenzien, wobei das angesaugte Flüssigkeitsvolumen in der ml-Größenordnung liegt.From DE-C-2,926,691 a repeating pipette is known, on which a suction device provided with a piston with a conical suction piece is to be arranged. The piston can be moved back and forth in a cylinder of the suction device, so that liquids can be sucked in when the piston is withdrawn and dispensed when the piston is advanced. The use of such a syringe-like suction device in conjunction with a repeating pipette is used in laboratory operation to remove liquids from a vessel and dispense them in a metered manner. The liquids are usually organic and inorganic liquids, solvents, acids, alkalis and reagents, the volume of liquid drawn being in the ml order.

Hierbei tritt häufig das Problem auf, daß die Flüssigkeit aus einem Gefäß entnommen werden muß, das so tief ist, daß mit dem Saugstück der Boden des Gefäßes nicht erreichbar ist. Außerdem soll trotz des bei der Flüssigkeitsentnahme sinkenden Flüssigkeitsniveaus im Gefäß immer gleichförmig dieselbe Flüssigkeitsmenge durch Saugwirkung entnommen werden können. Es sind zwar sogenannte Flaschendispenser bekannt, mit denen in ein offenes Zusatzgefäß gefördert werden kann, mit dem dann Flüssigkeit entnehmbar ist. Die Handhabung derartiger Flaschendispenser ist jedoch umständlich; außerdem sind sie aufwendig und teuer.The problem frequently arises here that the liquid must be removed from a vessel which is so deep that the bottom of the vessel cannot be reached with the suction piece. In addition, despite the falling liquid level in the vessel during the withdrawal of liquid, the same amount of liquid should always be able to be drawn off uniformly by suction. So-called bottle dispensers are known, with which can be conveyed into an open additional vessel, with which liquid can then be removed. The handling of such bottle dispensers is cumbersome; they are also complex and expensive.

Der Erfindung liegt die Aufgabe zugrunde, eine Ansaughilfe für eine mit einem Kolben versehene Ansaugeinrichtung mit einem Saugstück zur Flüssigkeitsentnahme aus einem Gefäß zu schaffen, das so tief ist, daß mit dem Saugstück der Boden des Gefäßes nicht erreichbar ist. Insbesondere soll durch die erfindungsgemäß vorgesehene Ansaughilfe ein Umfüllen der Flüssigkeit aus dem tiefen Gefäß in ein flaches Gefäß vermieden werden, was insbesondere bei der Verarbeitung aggressiver Substanzen problematisch wäre. Außerdem soll eine gleichbleibende Handhabung unter Aufrechterhaltung gleicher Saugbedingungen ermöglicht werden.The invention has for its object to provide a suction aid for a piston-provided suction device with a suction piece for removing liquid from a vessel that is so deep that the bottom of the vessel cannot be reached with the suction piece. In particular, by the suction aid provided according to the invention prevents the liquid from being transferred from the deep vessel into a flat vessel, which would be problematic in particular when processing aggressive substances. In addition, constant handling should be made possible while maintaining the same suction conditions.

Diese Aufgabe wird durch die im Patentanspruch 1 definierte Erfindung gelöst.This object is achieved by the invention defined in claim 1.

Aus der US-A-3,273,402 ist bereits ein Gerät bekannt, bei dem durch eine mit einem Kolben versehene Ansaugeinrichtung über ein eine Entnahmekammer bildendes Gehäuse, ein Rückschlagventil und ein Rohr eine Flüssigkeit aus einem Gefäß entnommen werden kann. Hierbei handelt es sich jedoch nicht um eine Ansaughilfe für eine getrennte Ansaugeinrichtung wie eine Pipette oder Pipettiervorrichtung. Vielmehr handelt es sich um eine Fördereinrichtung für eine Flüssigkeitsverdünnungsanlage, bei der die Ansaugeinrichtung einstückig an der Entnahmekammer angesetzt ist und das die Entnahmekammer bildende Gehäuse örtlich getrennt zu dem Gefäß angeordnet wird.From US-A-3,273,402 a device is already known in which a liquid can be removed from a vessel by means of a suction device provided with a piston via a housing forming a removal chamber, a check valve and a tube. However, this is not a suction aid for a separate suction device such as a pipette or pipetting device. Rather, it is a conveying device for a liquid dilution system, in which the suction device is attached in one piece to the removal chamber and the housing forming the removal chamber is arranged locally separated from the vessel.

Aus dem DE-U-19 54 583, der GB-A-950,304 und der DE-A-32 04 118 sind Dosiereinrichtungen bekannt, bei denen über ein Rohr Flüssigkeit aus einem Gefäß in eine Zwischenkammer gefördert wird, um von da abgegeben zu werden. Bei diesen Dosiervorrichtungen wird jedoch die Flüssigkeit durch das Rohr dadurch nach oben gefördert, daß das elastisch ausgebildete Gefäß manuell zusammengedrückt wird.Dosing devices are known from DE-U-19 54 583, GB-A-950,304 and DE-A-32 04 118, in which liquid is conveyed from a vessel into an intermediate chamber via a tube in order to be dispensed from there . In these metering devices, however, the liquid is conveyed upwards through the tube by manually compressing the elastic vessel.

Die erfindungsgemäß ausgebildete Ansaughilfe erlaubt es, Flüssigkeit aus einem Gefäß zu entnehmen, das für das Saugstück einer getrennten Ansaugeinrichtung wie einer Pipette oder Pipettiervorrichtung zu tief ist. Zur Flüssigkeitsentnahme wird das die Entnahmekammer bildende Gehäuse auf das Gefäß aufgesetzt, wobei das Rohr in das Gefäß, zweckmäßigerweise bis unmittelbar über dessen Boden eintaucht; anschließend wird das Saugstück der getrennten Ansaugeinrichtung in die Eintrittsöffnung des Gehäuses dichtend eingeführt. Wird nun der Kolben der Ansaugeinrichtung in einem Saughub nach oben gezogen, so wird durch den hierdurch erzeugten Unterdruck Flüssigkeit aus dem Gefäß durch das Rohr in die Entnahmekammer und von dort in die Ansaugeinrichtung angesaugt. Dies wird dadurch ermöglicht, daß die Entnahmekammer einerseits über das Rohr mit dem Gefäßinneren und andererseits über die Eintrittsöffnung mit der Ansaugeinrichtung verbunden, im übrigen jedoch gegen die Umgebung verschlossen ist. Das Rückschlagventil sorgt hierbei dafür, daß bei einem Saughub in das Rohr und die Entnahmekammer gelangte Flüssigkeit nicht in das Gefäß zurückfließen kann.The suction aid designed according to the invention allows liquid to be removed from a vessel that is too deep for the suction piece of a separate suction device such as a pipette or pipetting device. The housing forming the removal chamber is used for liquid removal placed on the vessel, the tube being immersed in the vessel, expediently up to just above the bottom thereof; then the suction piece of the separate suction device is inserted sealingly into the inlet opening of the housing. If the piston of the suction device is now pulled upwards in a suction stroke, the vacuum generated in this way draws liquid from the vessel through the pipe into the removal chamber and from there into the suction device. This is made possible in that the removal chamber is connected on the one hand via the tube to the interior of the vessel and on the other hand via the inlet opening to the suction device, but is otherwise closed to the environment. The check valve ensures that liquid that has entered the tube and the removal chamber during a suction stroke cannot flow back into the vessel.

Zweckmäßigerweise wird in einem ersten Saughub die Entnahmekammer bis zu einem durch das untere Ende des Saugstückes vorgegebenen Pegelstand mit der Flüssigkeit gefüllt. Anschließend kann dann mit der Ansaugeinrichtung in Form einer Pipette oder Pipettiervorrichtung kontinuierlich Flüssigkeit aus dem in der Entnahmekammer gebildeten Zwischenvolumen entnommen werden, das über das Rohr kontinuierlich nachgefüllt wird, so daß der Stand der Flüssigkeit in der Entnahmekammer praktisch konstant bleibt.In a first suction stroke, the removal chamber is expediently filled with the liquid up to a level determined by the lower end of the suction piece. Then, with the suction device in the form of a pipette or pipetting device, liquid can be withdrawn continuously from the intermediate volume formed in the removal chamber, which is continuously topped up via the tube, so that the level of the liquid in the removal chamber remains practically constant.

Bei Verwendung besonders kleinvolumiger Ansaugeinrichtungen kann zur sicheren Befüllung der Entnahmekammer zunächst einmalig eine größervolumige Ansaugeinrichtung verwendet werden.If particularly small-volume suction devices are used, a larger-volume suction device can be used once for the safe filling of the removal chamber.

Die erfindungsgemäß ausgebildete Ansaughilfe ist konstruktiv einfach und funktionssicher. Insbesondere macht sie teure Flaschendispenser oder dgl. überflüssig. Auch ein Umgießen der Flüssigkeit aus dem tiefen Gefäß in ein flaches Gefäß ist nicht mehr erforderlich.The suction aid designed according to the invention is structurally simple and reliable. In particular, it makes expensive bottle dispensers or the like superfluous. Also a casting the liquid from the deep vessel into a flat vessel is no longer required.

Gemäß einer bevorzugten Ausführungsform der Erfindung besteht das Gehäuse aus einer unteren Gehäuseschale und einer oberen Gehäuseschale, die dicht miteinander verbunden sind. Die obere Mündung des Rohres oder eines das Rohr aufnehmenden rohrförmigen Ansatzes ist hierbei nahe der Deckwand der oberen Gehäuseschale angeordnet. Die obere Mündung bildet somit im Inneren der Entnahmekammer einen Überlauf für die Flüssigkeit, wobei der sich in der Entnahmekammer befindende Pegelstand der Flüssigkeit sich in Abhängigkeit von der jeweiligen Eintauchtiefe des Saugstückes bildet. In jedem Fall liegt dieser Pegelstand unterhalb der oberen Mündung des Rohres bzw. des rohrförmigen Ansatzes, während oberhalb des Pegelstandes der Flüssigkeit das Gehäuse mit Luft gefüllt ist.According to a preferred embodiment of the invention, the housing consists of a lower housing shell and an upper housing shell, which are tightly connected to one another. The upper mouth of the tube or a tubular extension receiving the tube is arranged near the top wall of the upper housing shell. The upper mouth thus forms an overflow for the liquid in the interior of the removal chamber, the level of the liquid located in the removal chamber being formed as a function of the respective immersion depth of the suction piece. In any case, this level is below the upper mouth of the tube or the tubular extension, while above the level of the liquid, the housing is filled with air.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen erläutert, die in den Zeichnungen dargestellt sind. Es zeigt:

Fig. 1
eine Seitenansicht einer Ausführungsform einer Ansaughilfe;
Fig. 2
eine der Fig. 1 entsprechende Ansicht einer anderen Ausführungsform der Ansaughilfe;
Fig. 3
eine Draufsicht auf die Eintrittsöffnung mit einer Dichtung in schematischer Darstellung;
Fig. 4
eine Seitenansicht einer weiteren Ausführungsform.
The invention is explained below with reference to exemplary embodiments which are illustrated in the drawings. It shows:
Fig. 1
a side view of an embodiment of a suction aid;
Fig. 2
a view corresponding to Figure 1 of another embodiment of the suction aid.
Fig. 3
a plan view of the inlet opening with a seal in a schematic representation;
Fig. 4
a side view of another embodiment.

Die dargestellte Ansaughilfe besitzt ein Gehäuse 1. Dieses besteht aus einer unteren Gehäuseschale 2 und einer flüssigkeitsdicht angeflanschten oberen Gehäuseschale 3. Der Innenraum zwischen den beiden Gehäuseschalen 2 und 3 bildet eine Entnahmekammer 4. Aus der unteren Gehäuseschale 2 ragt ein Rohr 5 nach unten.The suction aid shown has a housing 1. This consists of a lower housing shell 2 and a liquid-tight flange-mounted upper housing shell 3. The interior between the two housing shells 2 and 3 forms a removal chamber 4. A tube 5 projects downward from the lower housing shell 2.

In Figur 1 ist untere Gehäuseschale 2 auf dem Rand 6 der Mündung eines als Flasche ausgebildeten Gefäßes 7 angeordnet. In dem Gefäß 7 befindet sich Flüssigkeit 8 mit einem Pegelstand 9, der mit zunehmender Flüssigkeitsentnahme sinkt.In Figure 1, the lower housing shell 2 is arranged on the edge 6 of the mouth of a vessel 7 designed as a bottle. In the vessel 7 there is liquid 8 with a level 9 which decreases with increasing liquid withdrawal.

Das Rohr 5 reicht bis auf den Boden 10 des Gefäßes 7 und hat umfangsmäßig verteilte, nach oben gerichtete Einschnitte 11. Gemäß einer anderen Ausführungsform ist das Rohr 5 so kurz, daß es oberhalb des Bodens 10 endet. Diese Anordnung hat den Zweck, Flüssigkeit aus dem Gefäß 7 solange entnehmen zu können, wie noch Flüssigkeit im Gefäß 7 vorhanden ist. Das Gehäuse 1 hat in der oberen Gehäuseschale 3, und zwar in der Deckwand 12 eine Eintrittsöffnung 13. Durch die Eintrittsöffnung 13 ist das konische Saugstück 14 einer spritzenartigen Ansaugeinrichtung 15 einsetzbar, die an einer Pipettenvorrichtung oder einer Repetierpipette angeordnet ist. Die Eintrittsöffnung 13 ist entsprechend konisch gestaltet und bildet insofern einen Dichtkegel für das konische Saugstück 14, das somit mit seinem unteren Ende bis zu einer bestimmten Tiefe in die Entnahmekammer 4 ragt.The tube 5 extends to the bottom 10 of the vessel 7 and has circumferentially distributed, upwardly directed incisions 11. According to another embodiment, the tube 5 is so short that it ends above the bottom 10. This arrangement has the purpose of being able to remove liquid from the vessel 7 as long as there is still liquid in the vessel 7. The housing 1 has an inlet opening 13 in the upper housing shell 3, specifically in the top wall 12. The conical suction piece 14 of a syringe-like suction device 15, which is arranged on a pipette device or a repeating pipette, can be inserted through the inlet opening 13. The inlet opening 13 is correspondingly conical and in this respect forms a sealing cone for the conical suction piece 14, which thus projects with its lower end to a certain depth into the removal chamber 4.

Gemäß einer (nicht gezeigten) Ausführungsform kann das Rohr 5 einteilig mit der unteren Gehäuseschale 2 ausgebildet sein. Seine Mündung liegt dicht unter der Deckwand 12.According to one embodiment (not shown), the tube 5 can be formed in one piece with the lower housing shell 2. Its mouth lies just below the top wall 12.

In dem dargestellten Ausführungsbeispiel ist in der unteren Gehäuseschale 2 ein rohrförmiger Ansatz 17 gebildet, der sich nach oben bis kurz unter die Deckwand 12 erstreckt und nach unten aus dem Boden 18 der unteren Gehäuseschale 2 heraustritt und nach innen gerichtete Dichtungsvorsprünge 19 hat. In den rohrförmigen Ansatz 17 ist das Rohr 5 flüssigkeitsdicht eingesetzt. Seine Einsatztiefe kann in Grenzen eingestellt werden, je nachdem wie weit das Rohr 5 in den rohrförmigen Ansatz 17 eingeschoben wird.In the illustrated embodiment, a tubular extension 17 is formed in the lower housing shell 2, which extends up to just below the top wall 12 and emerges downward from the bottom 18 of the lower housing shell 2 and has inwardly directed sealing projections 19. In the tubular extension 17, the tube 5 is inserted liquid-tight. Its depth of use can be set within limits, depending on how far the tube 5 is inserted into the tubular extension 17.

Der rohrförmige Ansatz 17 hat unterhalb seiner oberen Mündung 16 eine nach innen gerichtete, nach oben konkave schalenartige Profilierung 20 mit einem mittlerem Durchgang 21. Die Oberseite bildet einen Ventilsitz 22 für einen kugelförmigen Ventilkörper 23, der den Innenraum des Rohres 5 abdichtet, wenn eine nach unten gerichtete Saugkraft oder eine von oben gerichtete Druckkraft auftritt. Ein Ausschwimmen des Ventilkörpers 23 aus der Mündung 16 wird durch einen in die Mündung 16 ragenden Ansatz 25 an der Deckwand 12 des Gehäuses verhindert. Anstelle des Ansatzes 25 kann auch die Deckwand 12 direkt als Anschlag für den Ventilkörper 23 dienen, um ihn in dem rohrförmigen Ansatz 17 oberhalb des Ventilsitzes 22 zu halten.The tubular extension 17 has, below its upper mouth 16, an inwardly, upwardly concave, shell-like profile 20 with a central passage 21. The upper side forms a valve seat 22 for a spherical valve body 23, which seals the interior of the tube 5, if one follows suction force directed downwards or a pressure force directed from above occurs. A floating out of the valve body 23 from the mouth 16 is prevented by an extension 25 projecting into the mouth 16 on the top wall 12 of the housing. Instead of the extension 25, the top wall 12 can also serve directly as a stop for the valve body 23 in order to hold it in the tubular extension 17 above the valve seat 22.

Um Flüssigkeit aus dem Gefäß 7 entnehmen zu können, wird, nachdem die Ansaughilfe auf dem Gefäß 7 positioniert wurde, das Saugstück 14 der Ansaugeinrichtung 15 in die Eintrittsöffnung 13 eingesetzt. Bei einem Saughub der Ansaugeinrichtung 15 entsteht in der Entnahmekammer 4 ein Unterdruck, durch den über das Rohr 5 Flüssigkeit aus dem Gefäß 7 angesaugt wird. Dabei hebt sich der Ventilkörper 23 von seinem Sitz 22, und die Flüssigkeit steigt durch das Rohr 5 nach oben und fließt aus der oberen Mündung 16 in die Entnahmekammer 4. Hat die Flüssigkeit in der Entnahmekammer 4 einen Pegelstand 24 erreicht, der unmittelbar oberhalb der unteren Mündung 26 des Ansaugstückes 14 liegt, so wird bei Fortsetzung des Saughubes die Flüssigkeit aus der Entnahmekammer 4 in die Ansaugeinrichtung 15 eingezogen.In order to be able to remove liquid from the vessel 7, after the suction aid has been positioned on the vessel 7, the suction piece 14 of the suction device 15 is inserted into the inlet opening 13. During a suction stroke of the suction device 15, a negative pressure is created in the removal chamber 4, through which liquid 5 is sucked out of the vessel 7 via the tube 5. The valve body 23 lifts from its seat 22, and the liquid rises through the tube 5 and flows from the upper mouth 16 into the removal chamber 4. Has the liquid in the removal chamber 4 reached a level 24, which is immediately above the lower one Mouth 26 of the suction piece 14 is located, so the liquid is drawn from the removal chamber 4 into the suction device 15 as the suction stroke continues.

Reicht der erste Saughub der Ansaugeinrichtung 15 nicht aus, um die Entnahmekammer bis zum Pegelstand 24 mit Flüssigkeit zu füllen und darüberhinaus Flüssigkeit in die Ansaugeinrichtung 15 zu ziehen, so müßten ein zweiter oder auch mehrere Saughübe erfolgen. Der jeweils in die Entnahmekammer 4 gerichtete Druckhub sorgt dann dafür, daß der Ventilkörper 23 gegen seinen Ventilsitz 22 gedrückt wird und somit das Rohr 5 mit Flüssigkeit gefüllt bleibt. Entsprechend bleibt der Pegelstand 24 erhalten, wenn er einmal erreicht ist. Der sich dabei ergebende Überdruck in der Entnahmekammer 4 wird durch ein Entlüftungsventil 45 entlastet.If the first suction stroke of the suction device 15 is not sufficient to fill the removal chamber with liquid up to the level 24 and also to draw liquid into the suction device 15, then a second or several suction strokes would have to take place. The pressure stroke directed into the removal chamber 4 then ensures that the valve body 23 is pressed against its valve seat 22 and thus the tube 5 remains filled with liquid. Accordingly, the level 24 is maintained once it is reached. The resulting overpressure in the removal chamber 4 is relieved by a vent valve 45.

Das Entlüftungsventil 45 kann jedoch vermieden werden, wenn nach dem ersten Ansaughub das Saugstück 14 der Ansaugeinrichtung 15 aus der Eintrittsöffnung 13 entnommen wird und dann der Kolben der Ansaugeinrichtung 15 in einem Druckhub zu seiner Ausgangsstellung zurückgeführt wird.The vent valve 45 can, however, be avoided if, after the first suction stroke, the suction piece 14 of the suction device 15 is removed from the inlet opening 13 and then the piston of the suction device 15 is returned to its starting position in a pressure stroke.

Figur 2 zeigt eine entsprechende Ausführungsform mit gleichen Bezugszeichen, wobei aber das Rückschlagventil mit dem Ventilkörper 23' am unteren Ende des Rohres 5 angeordnet ist. Hierbei ist der Ventilkörper 23' in einem Aufsatzstück 27 angeordnet, das seitliche Öffnungen 28 zum Eintritt der Flüssigkeit hat. Das Aufsatzstück 27 kann abziehbar sein, so daß die Länge des Rohres 5 auch in dieser Ausführungsform an die Tiefe des Gefäßes angepaßt werden kann. Es versteht sich im übrigen, daß über den Öffnungen 28 durch eine Verjüngung des Aufsatzstückes 27 ein Ventilsitz 35 für den Ventilkörper 23' geschaffen wird, der innerhalb des Aufsatzstückes 27 und unterhalb des unteren Rohrendes genügend Raum hat, um abzuheben.Figure 2 shows a corresponding embodiment with the same reference numerals, but the check valve with the valve body 23 'is arranged at the lower end of the tube 5. Here, the valve body 23 'is arranged in an attachment piece 27 which has lateral openings 28 for the entry of the liquid. The top piece 27 can be removed, so that the length of the tube 5 can also be adapted to the depth of the vessel in this embodiment. It goes without saying that a valve seat 35 for the valve body 23 'is created above the openings 28 by tapering the attachment piece 27, which has enough space within the attachment piece 27 and below the lower tube end to lift off.

Der an der unteren Gehäuseschale 2 angeordnete rohrförmige Ansatz 17 ist durch eine enge Passung mit dem Rohr 5 verbunden. Auch in diesem Zusammenhang ist eine Anpassungsmöglichkeit an die Flaschentiefe durch unterschiedliches Einschieben des Rohres 5 in den rohrförmigen Ansatz 17 gegeben.The tubular extension 17 arranged on the lower housing shell 2 is connected to the tube 5 by a close fit. In this context, too, there is a possibility of adjustment given to the bottle depth by pushing the tube 5 differently into the tubular extension 17.

In Figur 2 ist der untere Pegelstand 24 als Mindestfüllstandshöhe entsprechend einer maximalen Länge des Ansatzstückes 14 eingezeichnet. Ferner ist ein oberer Pegelstand 29 unterhalb der oberen Mündung 16 des Rohres 5 entsprechend einer minimalen Länge des Ansatzstückes 14 angegeben.In Figure 2, the lower level 24 is shown as the minimum level corresponding to a maximum length of the extension 14. Furthermore, an upper level 29 below the upper mouth 16 of the tube 5 is indicated corresponding to a minimum length of the extension piece 14.

Die Figur 3 zeigt eine Draufsicht auf die Eintrittsöffnung 13. Sie hat einen flanschartigen Rand 30 und ist im Inneren von einer Dichtung 31 in Form einer Membrane durchsetzt, die von ihrer Mitte ausgehende sternförmige Einschnitte 32, 33 und 34 hat. Wenn das Saugstück 14 in die Eintrittsöffnung 13 eingedrückt wird, geht es in der Mitte glatt durch. Dabei findet das Ansaugstück 14 eine sichere Dichtung im konusförmigen Anlagebereich. Bei Rückzug kehren die elastischen Sektoren zwischen den Einschnitten 32 bis 34 in ihre Ausgangsstellung zurück und schließen diese Eintrittsöffnung 13 im wesentlichen, so daß auch in diesem Fall eine Verdunstung weitestgehend ausgeschlossen ist.FIG. 3 shows a top view of the inlet opening 13. It has a flange-like edge 30 and is penetrated on the inside by a seal 31 in the form of a membrane which has star-shaped incisions 32, 33 and 34 extending from its center. When the suction piece 14 is pressed into the inlet opening 13, it passes smoothly in the middle. The suction piece 14 finds a secure seal in the conical contact area. Upon withdrawal, the elastic sectors between the incisions 32 to 34 return to their starting position and essentially close this inlet opening 13, so that evaporation is largely excluded in this case as well.

Bei dem Ausführungsbeispiel der Figur 4 ist eine Schale 40 vorgesehen, die nach oben offen ist. Von ihr geht das nach unten gerichtete Rohr 5 aus. Unterhalb eines konischen bzw. kegelförmigen Wandteils 41 der Schale 40 und unterhalb einer mittleren Durchgangsöffnung 37 befindet sich das Rückschlagventil mit dem Ventilsitz 22 und dem kugelförmigen Ventilkörper 23.In the embodiment of Figure 4, a shell 40 is provided which is open at the top. From it, the downward tube 5 starts. The check valve with the valve seat 22 and the spherical valve body 23 is located below a conical or conical wall part 41 of the shell 40 and below a central through opening 37.

Die Schale 40 hat einen von der Durchgangsöffnung 37 nach unten gehenden, leicht konischen Stutzen 39, in welchem das Rückschlagventil 22, 23 angeordnet ist. Auf diesen Stutzen 39 ist das Rohr 5 abdichtend aufgeschoben.The shell 40 has a slightly conical connecting piece 39, which goes down from the through opening 37 and in which the check valve 22, 23 is arranged. The tube 5 is pushed onto this connection piece 39 in a sealing manner.

In der Schale 40 und in den Stutzen 39 hineinragend ist eine den jeweiligen Wandteilen in der Form angepaßter Einsatz 42 angeordnet. Er bildet einen abdichtenden Sitz für das Saugstück 14 der mit einem Kolben versehenen Ansaugeinrichtung 15.In the shell 40 and protruding into the socket 39, an insert 42 which is adapted to the respective wall parts is arranged. It forms a sealing seat for the suction piece 14 of the suction device 15 provided with a piston.

Der untere Rand 43 des Einsatzes 42 bildet zugleich ein Widerlager bzw. ein Halteelement für den Ventilkörper 23, falls er aufschwimmt. Sein Durchmesser ist größer als der Durchgangsdurchmesser des unteren Randes 43.The lower edge 43 of the insert 42 also forms an abutment or a holding element for the valve body 23 if it floats. Its diameter is larger than the passage diameter of the lower edge 43.

Der von dem Stutzen 39, dem Ventil 22, 23 und dem Einsatz 42 gebildete Raum bildet die Entnahmekammer 4, über die Flüssigkeit aus dem Rohr 5 in das Saugstück 14 der Ansaugeinrichtung 15 gesaugt werden kann.The space formed by the connection piece 39, the valve 22, 23 and the insert 42 forms the removal chamber 4, via which liquid can be sucked out of the tube 5 into the suction piece 14 of the suction device 15.

Claims (11)

  1. An auxiliary sucking device for a piston-type sucking device having a sucking element for taking liquid from a vessel which is of a depth such that the sucking element cannot reach the bottom of the vessel, comprising
    - a tube (5) adapted to be introduced into the vessel (7),
    - a check valve (22,23; 35,23') associated with the tube (5) and closing the tube (5) in a direction opposite to the sucking direction;
    - a bowl (1,2,3,12,18; 39,42) adapted to be detachably mounted on the vessel (7), the tube (5) sealingly extending into the bowl;
    - the bowl (1,2,3,12,18; 39,42) defining a space (4) for holding a stand-by volume of liquid and
    - an inlet opening (13) for receiving the sucking element (14) of the sucking device (14,15) being provided in the bowl (1,2,3,12,18; 39,42), the inlet opening being adapted to sealingly receive the sucking element (14),
    - such that the sucking device (14,15) is adapted to produce a vacuum in said space (4).
  2. An auxiliary sucking device according to claim 1, characterized in that the bowl (1) comprises a lower bowl member (2) and an upper bowl member (3), the upper mouth (16) of the tube (5) or of a tube-like projection (17) of the tube (5) being positioned adjacent the top wall (12) of the upper bowl member (3).
  3. An auxiliary sucking device according to claim 1 or 2, characterized in that the check valve (22,23) is disposed below the upper mouth (16) of the tube (5) within the bowl.
  4. An auxiliary sucking device according to claim 1 or 2, characterized in that the check valve (35,23') is disposed in a fitting (27) at the lower end of the tube (5).
  5. An auxiliary sucking device according to any of claims 1 to 4, characterized in that the tube (5) is made from a material adapted to be cut to length.
  6. An auxiliary sucking device according to any of claims 1 to 5, characterized in that the inlet opening (13) is of conical shape corresponding to the conical shape of the tip (14) of the syringe-like sucking device (15).
  7. An auxiliary sucking device according to any of claims 1 to 6, characterized in that a vent valve (45) is disposed in the upper area of the bowl (1).
  8. An auxiliary sucking device according to any of claims 1 to 7, characterized in that the inlet opening (13) includes a sealing member (31) arranged to open when the sucking element (14) is inserted therein and to close when the sucking element (14) is removed.
  9. An auxiliary sucking device according to claim 1, characterized in that said space (4) comprises a pipe (39) provided at the lower part of a cup (40) and an insert leading into the pipe (39) of the cup (40).
  10. An auxiliary sucking device according to claim 9, characterized in that the tube (5) is adapted to be positioned upon the pipe (39) of the cup (40), the check valve (22,23) being provided at the lower end of the pipe (39).
  11. An auxiliary sucking device according to any of claims 1 to 8, characterized in that the lower area (2) of the bowl (1) is of conical shape so as to enable its seating and centering upon a rim (6) of the bowl (7).
EP89109287A 1988-05-28 1989-05-23 Auxiliary suction device for taking liquids from deep voluminous vessels Expired - Lifetime EP0345527B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89109287T ATE86143T1 (en) 1988-05-28 1989-05-23 SUCTION DEVICE FOR TAKING LIQUID FROM A VESSEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818238 1988-05-28
DE3818238A DE3818238A1 (en) 1988-05-28 1988-05-28 METHOD FOR REMOVING LIQUID FROM LARGE-VOLUME, DEEP VESSELS AND DEVICE FOR IMPLEMENTING THE METHOD BY SUCTION VESSELS WITH SHORT SUCTION PIECES AS SUCTION AID

Publications (3)

Publication Number Publication Date
EP0345527A2 EP0345527A2 (en) 1989-12-13
EP0345527A3 EP0345527A3 (en) 1990-11-28
EP0345527B1 true EP0345527B1 (en) 1993-03-03

Family

ID=6355372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109287A Expired - Lifetime EP0345527B1 (en) 1988-05-28 1989-05-23 Auxiliary suction device for taking liquids from deep voluminous vessels

Country Status (5)

Country Link
US (1) US4982614A (en)
EP (1) EP0345527B1 (en)
JP (1) JPH0672791B2 (en)
AT (1) ATE86143T1 (en)
DE (1) DE3818238A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940534A1 (en) * 1989-12-07 1991-06-13 Zeller Plastik Koehn Graebner Liquid dispensing arrangement, esp. for bottles - has open-topped dispensing beaker in bottle opening, one-piece closure cap and piston
US5442421A (en) * 1990-10-01 1995-08-15 Canon Kabushiki Kaisha Process cartridge and image forming apparatus using the same
DE19817438A1 (en) * 1998-04-20 1999-10-21 Biotul Bio Instr Gmbh Automatic reservoir presenting specific fluid quantity to robotic pipetting system,
DE10050085C1 (en) * 2000-10-10 2001-10-31 Jochem Koetting Container closure element e.g. for analysis or reaction tube, provided as sphere, sphere segment, section or layer with paramagnetic core
CA2718060C (en) * 2008-03-05 2015-08-04 Becton, Dickinson & Company Co-molded pierceable stopper and method for making same
BRPI0910279B8 (en) 2008-03-05 2021-06-22 Becton Dickinson Co capillary action collection device and container assembly
US8460620B2 (en) 2010-12-03 2013-06-11 Becton, Dickinson And Company Specimen collection container assembly
JP7261382B2 (en) * 2018-08-06 2023-04-20 大日本印刷株式会社 Liquid metering devices and containers with liquid metering devices
CN117244601B (en) * 2023-11-20 2024-02-02 至美时代生物智能科技(北京)有限公司 Liquid quantitative device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720161A (en) * 1949-05-24 1954-12-15 London County Council Improvements relating to the sampling of liquids
DE1171180B (en) * 1959-08-14 1964-05-27 Walter Jansky Device for taking liquid samples from a container
US3105618A (en) * 1960-09-21 1963-10-01 Beckman Instruments Inc Micro pipette fluid distributor
US3273402A (en) * 1964-04-27 1966-09-20 Andrew F Farr Specimen sampling and diluting apparatus
DE1275726B (en) * 1966-02-01 1968-08-22 Hubert Donhauser Drug dosing device
DE1954583U (en) * 1966-11-03 1967-02-02 Degussa DEVICE FOR DOSING LIQUIDS.
US3811484A (en) * 1971-06-14 1974-05-21 E Engelbrecht Method and apparatus for delivering a predetermined volume of a liquid
DE2926691C2 (en) * 1979-07-02 1983-05-26 Eppendorf Gerätebau Netheler + Hinz GmbH, 2000 Hamburg Repeater pipette
DE3204118C2 (en) * 1982-02-06 1985-04-18 Wella Ag, 6100 Darmstadt Dosing device
FI844320A (en) * 1984-11-02 1986-05-03 Labsystems Oy UTSPAEDNINGSDOSERINGSANORDNING.
JPS62113040A (en) * 1985-11-12 1987-05-23 Taisei Corp Concrete mixing water sampling method and sampling device

Also Published As

Publication number Publication date
JPH0225713A (en) 1990-01-29
US4982614A (en) 1991-01-08
EP0345527A2 (en) 1989-12-13
DE3818238A1 (en) 1989-11-30
JPH0672791B2 (en) 1994-09-14
EP0345527A3 (en) 1990-11-28
ATE86143T1 (en) 1993-03-15
DE3818238C2 (en) 1992-03-26

Similar Documents

Publication Publication Date Title
DE2439392C2 (en) Liquid suction and collection device
DE69013883T2 (en) Pump arrangement.
DE10316502B4 (en) Liquid dispenser with a device for pressure equalization of negative pressure
DE69605057T2 (en) LIQUID TANK WITH RE-LOCKABLE SPOUT
DE69925620T2 (en) DISPENSER IN THE FORM OF A COVER
DE69029320T2 (en) DOSING DEVICE
EP0345527B1 (en) Auxiliary suction device for taking liquids from deep voluminous vessels
DE202010011973U1 (en) Oil drain device
DE69726616T2 (en) SIPHON DEVICE FOR COATING AND SEPARATING LIQUID.
EP0098966A2 (en) Milk sampling device
EP0331912A2 (en) Sample receiving element able to be filled for handling liquid samples
DE2531825C3 (en) Device for keeping the flow of a liquid constant
DE102009035345A1 (en) Device for extracting liquid sample i.e. water sample, from e.g. river, has ventilation opening arranged at distance to suction opening, and suction line associated with atmosphere or separated from atmosphere by ventilation opening
EP2919911B1 (en) Pipette and method of pipetting
EP2979544A1 (en) Livestock suction device
DE2415618C3 (en) Filter device for separating blood fractions
DE2648330C2 (en) Device for taking a sample from a pumped-off limited amount of an inhomogeneous liquid
EP3517005B1 (en) Device for delivering a flowable medium
DE102010038215B4 (en) Method and device for safely emptying and filling a reagent container
DE3235961C2 (en) Evaporation sensor for an aquarium
EP0737644B1 (en) Bottling device for liquids
DE68923620T2 (en) ARRANGEMENT FOR SELECTIVE DONATION AND MIXING OF SEVERAL BEVERAGES.
DE102019117181B3 (en) Removal device for liquid containers
DE102008059642B4 (en) metering
DE9115924U1 (en) Removal attachment for one bottle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH ES FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19901120

17Q First examination report despatched

Effective date: 19910913

RTI1 Title (correction)
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH ES FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19930303

Ref country code: SE

Effective date: 19930303

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19930303

Ref country code: BE

Effective date: 19930303

Ref country code: NL

Effective date: 19930303

REF Corresponds to:

Ref document number: 86143

Country of ref document: AT

Date of ref document: 19930315

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930416

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19930523

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19930531

Ref country code: LI

Effective date: 19930531

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930603

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930603

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST