WO1982004409A1 - Device for withdrawing a determined amount of liquid from a container - Google Patents

Device for withdrawing a determined amount of liquid from a container Download PDF

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Publication number
WO1982004409A1
WO1982004409A1 PCT/EP1982/000121 EP8200121W WO8204409A1 WO 1982004409 A1 WO1982004409 A1 WO 1982004409A1 EP 8200121 W EP8200121 W EP 8200121W WO 8204409 A1 WO8204409 A1 WO 8204409A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
stops
stop
piston
adjustable
Prior art date
Application number
PCT/EP1982/000121
Other languages
German (de)
French (fr)
Inventor
Sa Pharmed
Original Assignee
Aberle Manfred
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 Aberle Manfred filed Critical Aberle Manfred
Publication of WO1982004409A1 publication Critical patent/WO1982004409A1/en

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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
    • B01L3/0282—Burettes; Pipettes mounted within a receptacle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type
    • G01F11/023—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type with provision for varying the stroke of the piston

Definitions

  • the present invention relates to a device of the type mentioned in the preamble of claim 1.
  • Such a device also called a metering device, is known from the publication DE 2 343 687 B2.
  • the intake volume is adjusted in that an adjustable stop arranged in an axially parallel groove of a cylinder sleeve is locked at a desired height and thereby interacts with its fixed movement on the piston cylinder during its movement coupled with the piston.
  • the object of the invention is therefore to provide a device in which an easy, easy-to-read, exactly reproducible and extremely precise adjustment of the volume of liquid to be removed is possible.
  • FIG. 1 shows a schematic overall view of the device according to the invention mounted on a liquid container
  • Figure 2 shows a longitudinal section along the plane II-II of Figure 1 and
  • the device has a piston 1 which is slidably arranged in a cylinder 2.
  • the cylinder 2 is surrounded by a sleeve-shaped part 3, which has a thread 4 in its lower part and is thus screwed into a bore of a valve block 5 provided with a thread 5a.
  • the valve block 5 is in turn attached to the neck of a container 10 for the liquid to be dispensed.
  • the upper part 31 of the sleeve-shaped part 3 has a shoulder 31a, which is supported on the upper edge of the cylinder 2 and thus holds it on the valve block 5.
  • the valve block 5 has an intake duct 6 with an intake valve 7, and an outlet duct 8 with an exhaust valve, the valves shown being, for example, ball valves.
  • the valves shown being, for example, ball valves.
  • the arrangement and effect of the valves is known and is not described in detail here.
  • a cylinder sleeve 11 is arranged coaxially to the cylinder 2 and in particular surrounds the sleeve-shaped part 3 at a short distance.
  • the cylinder sleeve 11 is firmly connected to the upper part of the piston, in the example shown by a thread 11a and a connecting part 12.
  • a knurled button 13 closes off the cylinder casing 11 at the top.
  • the lower edge of the cylinder sleeve 11 has an extension in the form of an annular Part 14, which is radially but not axially movable relative to the sleeve 1 1.
  • the upper edge part 15 of the ring part 14 engages in a circumferential groove 16 of the cylinder sleeve 11.
  • the inside of the ring part 14 has a helical groove 19 into which a first nose 13 of a stop part 17 engages.
  • the stop part 17 also has a second nose 20 which slides in an 'axially parallel guide groove 21 of the inner surface of the cylinder sleeve 11.
  • the stop part 17 is thereby guided parallel to the axis of the cylinder 2.
  • the stop part 1 is also supported on the outer surface of the part 3, a nose 22 arranged on an elastic arm 23 engaging in an axially parallel guide groove of the part 3.
  • the part 3 is provided with a plurality of such guide grooves 24a, 24b, 24c, 24d, 24e etc., which are arranged on its surface at regular angular intervals.
  • step-shaped stop surfaces 25a, 25b, 25c, 25d, 25e etc. are arranged at regular intervals and in each case with the same height differences in the axial direction.
  • the movable stop part 17, which is connected to the cylinder sleeve 11, can be brought into different angular positions with respect to the part 3 with the longitudinal grooves 24a, 24b, etc. by rotating the same, the nose 22 engaging in the corresponding longitudinal groove on the resilient arm 23 .
  • the cylinder sleeve 11 In its Aur- and downward movement, the cylinder sleeve 11 is also guided practically against rotation by the nose 22; the upward movement of the cylinder sleeve 11 and thus of the piston 1 is limited by a corresponding stop surface of the step-shaped stop 26.
  • This stop surface 25a, 25b etc. corresponds to a specific piston stroke and thus a specific one Amount of liquid that is sucked in and expelled when the cylinder sleeve 11 moves toward the outside.
  • the piston stroke selected by rotating the cylinder sleeve 11 into a certain latching position is preferably displayed with the aid of an adjustment mark designed as a window 28 in part 11 and a number ring attached behind it on the surface of part 3, the number visible in window 28, for example, the stroke volume in cubic centimeters. Fine adjustment of the piston stroke is achieved by rotating the annular part 14.
  • the pitch of the thread 19 is preferably chosen so that between the extreme angular positions of the annular part 14 with respect to the cylinder sleeve 11 there is an axial adjustment of the stop surface 27 of the stop part 17 in accordance with the axial distance between two successive step surfaces of the stop 26.
  • a knurled grip part 29 of the ring part 14 and a numerical scale 30 enable a precise setting of the angular position relative to a setting mark on the cylinder sleeve 11 and thus a fine adjustment of the piston stroke between two graduated amounts of liquid.
  • the aforementioned setting enables extremely high precision and complete repeatability of the liquid metering. In addition, this results in particularly simple and quick handling, which can also be carried out with one hand when the digital range is selected.
  • the easy-to-read display means also reduce the risk of errors when hiring.
  • the ring-shaped part 14 and the associated fine adjustability can optionally be dispensed with and the stop part 17 can be firmly connected to the cylinder sleeve 11.
  • the stop part 17 can also be designed step-like and cooperate with a suitable fixed stop 26.
  • the ad can means for the mutual angular position of the stops or the fine adjustment of one of the stops in another form familiar to the person skilled in the art.

Abstract

The piston (1) glides within the cylinder (2) which is affixed to the valve block (5) by means of a sleeve (3). The stroke of the piston (1) is controllably limited by a removable thrust (17) which is maintained on the cylindrical envelope (11) and guided by means of a beck (22) engaged into slots (24a, 24b, 24c...), until its thrust surface (27) contacts a corresponding surface (25a, 25b, 25c) of a fixed thrust (27). By rotating the cylindrical envelope (11) with respect to the fixed sleeve (3), the beck (22) moves from a guiding slot to the other, which modifies the piston stroke (1). The sleeve (3) is provided with marks which can be seen through a window (28) of the cylindrical envelope (11) and indicate the withdrawn volume for each angular position of the envelope (11). The device provides the advantage of a better handling and a greater metering accuracy of the amount of liquid withdrawn with respect to known devices.

Description

Vorrichtung zum Entnehmen einer bestimmten Flüssigkeitsmenge aus einem BehälterDevice for removing a certain amount of liquid from a container
Die vorliegende Erfindung betrifft eine Vorrichtung der im Oberbegriff des Patentanspruchs 1 genannten Art.The present invention relates to a device of the type mentioned in the preamble of claim 1.
Eine solche, auch Dosiergerät genannte Vorrichtung ist aus der Veröffentlichung DE 2 343 687 B2 bekannt. In dieser Vorrichtung wird das Ansaugvolumen dadurch eingestellt, dass ein in einer achsparallelen Nut einer Zylinderhülse angeordneter verstell barer Anschlag in einer gewünschten Höhe arretiert wird und dadurch bei seiner mit dem Kolben gekoppelten Bewegung mit einem festen Anschlag am Kolbenzylinder zusammenwirkt.Such a device, also called a metering device, is known from the publication DE 2 343 687 B2. In this device, the intake volume is adjusted in that an adjustable stop arranged in an axially parallel groove of a cylinder sleeve is locked at a desired height and thereby interacts with its fixed movement on the piston cylinder during its movement coupled with the piston.
Bei dieser bekannten Anordnung ist die Einstellung des Kolbenhubes jedoch relativ umständlich und ungenau. Gerade bei dieser Art von Dosiergeräten kommt es jedoch auf eine rasche und äusserst präzise Einstellbarkeit besonders an.In this known arrangement, however, the setting of the piston stroke is relatively cumbersome and inaccurate. Especially with this type of dosing device, rapid and extremely precise adjustability is particularly important.
Aufgabe der Erfindung ist es daher, eine Vorrichtung zu schaffen, bei der eine leichte, leicht ablesbare, genau reproduzierbar und äusserst präzise Einstellung des zu entnehmenden Flüssigkeit Volumens möglich ist.The object of the invention is therefore to provide a device in which an easy, easy-to-read, exactly reproducible and extremely precise adjustment of the volume of liquid to be removed is possible.
Dies wird erfindungsgemäss durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale erreicht. Die Ansprüche 2 bis 5 beschreiben besondere Ausführung s formen der Erfindung.This is achieved according to the invention by the features specified in the characterizing part of patent claim 1. Claims 2 to 5 describe special embodiments of the invention.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der beigefügten Zeichnung näher beschrieben. Es zeigen : Figur 1 eine schematische Gesamtansicht der auf einem Flüssig keitsbehälter angebrachten erfindungsgemässen Vorrichtung,An embodiment of the invention is described below with reference to the accompanying drawings. Show it : FIG. 1 shows a schematic overall view of the device according to the invention mounted on a liquid container,
Figur 2 einen Längsschnitt gemäss der Ebene II-II der Figur 1 undFigure 2 shows a longitudinal section along the plane II-II of Figure 1 and
Figur 3 einen Querschnitt gemäss der Ebene III-III von Figur 2.3 shows a cross section along the plane III-III of Figure 2.
Wie insbesondere aus Figur 2 ersichtlich, weist die Vorrichtung einen Kolben 1 auf, der in einem Zylinder 2 gleitbar angeordnet ist. Der Zylinder 2 ist von einem hülsenförmigen Teil 3 umgeben, der in seinem unteren Teil ein Gewinde 4 trägt und damit in einer mit einem Gewinde 5a versehenen Bohrung eines Ventilblocks 5 durch Einschrauben befestigt ist. Der Ventilblock 5 ist seinerseits auf dem Hals eines Behälters 10 für die abzugebende Flüssigkeit befestigt. Der obere Teil 31 des hülsenförmigen Teils 3 weist einen Absatz 31a auf, welcher sich auf den oberen Rand des Zylinders 2 abstützt und diesen damit auf dem Ventilblock 5 festhält.As can be seen in particular from FIG. 2, the device has a piston 1 which is slidably arranged in a cylinder 2. The cylinder 2 is surrounded by a sleeve-shaped part 3, which has a thread 4 in its lower part and is thus screwed into a bore of a valve block 5 provided with a thread 5a. The valve block 5 is in turn attached to the neck of a container 10 for the liquid to be dispensed. The upper part 31 of the sleeve-shaped part 3 has a shoulder 31a, which is supported on the upper edge of the cylinder 2 and thus holds it on the valve block 5.
Der Ventilblock 5 weist einen Ansaugkanal 6 mit einem Ansaugventil 7 auf, sowie einen Auslasskanal 8 mit einem Auslassventil wobei die gezeigten Ventile beispielsweise Kugelventile sind. Die Anordnung und Wirkung der Ventile ist bekannt und wird hier nicht näher beschrieben.The valve block 5 has an intake duct 6 with an intake valve 7, and an outlet duct 8 with an exhaust valve, the valves shown being, for example, ball valves. The arrangement and effect of the valves is known and is not described in detail here.
Eine Zylinderhülse 11 ist koaxial zum Zylinder 2 angeordnet und umgibt insbesondere den hülsenförmigen Teil 3 in einem geringen Abstand. Die Zylinderhülse 11 ist mit dem oberen Teil des Kolbens fest verbunden, im gezeigten Beispiel durch ein Gewinde 11a und einen Verbindungsteil 12. Ein gerändelter Knopf 13 schliesst die Zylinderhüise 11 nach oben ab. Durch Auf- und Abbewegen der Zylinderhülse 11 und damit des Kolbens 1 im Zylinder 2 wird die dem Kolbenhub entsprechende Flüssigkeitsmenge angesaugt bzw. über den Auslasskanal 8 abgegeben. Der untere Rand der Zylinderhülse 11 weist eine Verlängerung in Form eines ringförmigen Teils 14 auf, der radial aber nicht axial gegenüber der Hülse 1 1 bewegbar ist. Der obere Randteil 15 des Ringteils 14 greift dazu in eine Umfangsnut 16 der Zylinderhülse 11 ein.A cylinder sleeve 11 is arranged coaxially to the cylinder 2 and in particular surrounds the sleeve-shaped part 3 at a short distance. The cylinder sleeve 11 is firmly connected to the upper part of the piston, in the example shown by a thread 11a and a connecting part 12. A knurled button 13 closes off the cylinder casing 11 at the top. By moving the cylinder sleeve 11 and thus the piston 1 in the cylinder 2 up and down, the amount of liquid corresponding to the piston stroke is sucked in or discharged via the outlet channel 8. The lower edge of the cylinder sleeve 11 has an extension in the form of an annular Part 14, which is radially but not axially movable relative to the sleeve 1 1. For this purpose, the upper edge part 15 of the ring part 14 engages in a circumferential groove 16 of the cylinder sleeve 11.
Die Innenseite des Ringteils 14 weist eine schraubenförmige Nut 19 auf, in die eine erste Nase 13 eines Anschlagteils 17 eingreift. Der Anschlagteil 17 weist ferner eine zweite Nase 20 auf, die in einer 'achsparallelen Führungsnut 21 der Innenfläche der Zylinderhülse 11 gleitet. Der Anschlagteil 17 wird dadurch parallel zur Achse des Zylinders 2 geführt. Der Anschlagteil 1 stützt sich ferner auf die Aussenfläche des Teils 3, wobei eine auf einem elastischen Arm 23 angeordnete Nase 22 in eine achsparallele Führungsnut des Teils 3 eingreift. Der Teil 3 ist mit mehreren solchen Führungsnuten 24a, 24b, 24c, 24d, 24e etc. versehen, die in regelmässigen Winkelabständen auf seiner Oberfl äche angeordnet sind. Diese Führungsnuten enden jeweils auf der Höhe einer senkrecht dazu verlaufenden Anschlagflache, die Teil eines stufenförmigen Anschlags 26 ist. Die stufenförmigen Anschlagflachen 25a, 25b, 25c, 25d, 25e etc. sind in regelmässigen Abständen und jeweils gleichen Höhenunterschieden in Axialrichtung angeordnet.The inside of the ring part 14 has a helical groove 19 into which a first nose 13 of a stop part 17 engages. The stop part 17 also has a second nose 20 which slides in an 'axially parallel guide groove 21 of the inner surface of the cylinder sleeve 11. The stop part 17 is thereby guided parallel to the axis of the cylinder 2. The stop part 1 is also supported on the outer surface of the part 3, a nose 22 arranged on an elastic arm 23 engaging in an axially parallel guide groove of the part 3. The part 3 is provided with a plurality of such guide grooves 24a, 24b, 24c, 24d, 24e etc., which are arranged on its surface at regular angular intervals. These guide grooves each end at the height of a stop surface running perpendicular to it, which is part of a step-shaped stop 26. The step-shaped stop surfaces 25a, 25b, 25c, 25d, 25e etc. are arranged at regular intervals and in each case with the same height differences in the axial direction.
Der bewegliche Anschlagteil 17, der mit der Zylinderhülse 11 verbunden ist, kann durch Drehung derselben in verschiedene Winkelstellungen gegenüber dem Teil 3 mit den Längsnuten 24a, 24b, etc. gebracht werden, wobei die Nase 22 auf dem federnden Arm 23 in die entsprechende Längsnut einrastet. In ihrer Aur- und Abbewegung ist die Zylinderhülse 11 ebenfalls durch die Nase 22 praktisch verdrehungssicher geführt; wobei die Bewegung der Zylinderhülse 11 und damit des Kolbens 1 nach oben durch eine entsprechend e Anschlagfläche des stufenförmigen Anschlags 26 begrenzt ist. Dieser Anschlagfläche 25a, 25b etc. entspricht ein bestimmter Kolbenhub und damit eine bestimmte Flüssigkeitsmenge, die angesaugt und bei de: ALwärtsbewegung der Zylinderhülse 11 ausgestossen wird.The movable stop part 17, which is connected to the cylinder sleeve 11, can be brought into different angular positions with respect to the part 3 with the longitudinal grooves 24a, 24b, etc. by rotating the same, the nose 22 engaging in the corresponding longitudinal groove on the resilient arm 23 . In its Aur- and downward movement, the cylinder sleeve 11 is also guided practically against rotation by the nose 22; the upward movement of the cylinder sleeve 11 and thus of the piston 1 is limited by a corresponding stop surface of the step-shaped stop 26. This stop surface 25a, 25b etc. corresponds to a specific piston stroke and thus a specific one Amount of liquid that is sucked in and expelled when the cylinder sleeve 11 moves toward the outside.
Die Anzeige des durch Drehung der Zylinderhüise 11 in eine bestimmte Einraststellung gewählten Kolbenhubs erfolgt vorzugsweise mit Hilfe einer als Fenster 28 im Teil 11 ausgebildeten Einstellmarke und eines dahinter, auf der Oberfläche des Teils 3 angebrachten Ziffernrings, wobei die im Fenster 28 sichtbare Ziffer beispielsweise das Hubvolumen in Kubikzentimeter angibt. Eine Feineinstellung des Kolbenhubs wird durch Drehen des ringförmigen Teils 14 erzielt. Die Steigung des Gewindes 19 wird vorzugsweise so gewählt, dass zwischen den äussersten Winkel Stellungen des ringförmigen Teils 14 in Bezug auf die Zylinderhüise 11 eine axiale Verstellung der Anschlagflache 27 des Anschlagteils 17 entsprechend dem axialen Abstand zweier aufeinanderfolgender Stufenflächen des Anschlags 26 entsteht. Ein gerändelter Griffteil 29 des Ringteils 14 sowie eine Ziffern Skala 30 ermöglichen eine genaue Einstellung der Winkellage gegenüber einer Einstellmarke auf der Zylinderhülse 11 und damit eine Feineinstellung des Kolbenhubs zwischen zwei abgestuften Flüssigkeitsmengen.The piston stroke selected by rotating the cylinder sleeve 11 into a certain latching position is preferably displayed with the aid of an adjustment mark designed as a window 28 in part 11 and a number ring attached behind it on the surface of part 3, the number visible in window 28, for example, the stroke volume in cubic centimeters. Fine adjustment of the piston stroke is achieved by rotating the annular part 14. The pitch of the thread 19 is preferably chosen so that between the extreme angular positions of the annular part 14 with respect to the cylinder sleeve 11 there is an axial adjustment of the stop surface 27 of the stop part 17 in accordance with the axial distance between two successive step surfaces of the stop 26. A knurled grip part 29 of the ring part 14 and a numerical scale 30 enable a precise setting of the angular position relative to a setting mark on the cylinder sleeve 11 and thus a fine adjustment of the piston stroke between two graduated amounts of liquid.
Die erwähnte Einstellung ermöglicht eine äusserst grosse Präzision und eine vollkommene Wiederholbarkeit der Flüssigkeitsdosierung Zudem ergibt sich daraus eine besonders einfache und schnelle Handhabung, die bei digitaler Bereichswahl auch mit einer Hand erfolgen kann. Die leicht lesbaren Anzeigemittei verringern ferner das Fehlerrisiko anlässlich der Einstellung.The aforementioned setting enables extremely high precision and complete repeatability of the liquid metering. In addition, this results in particularly simple and quick handling, which can also be carried out with one hand when the digital range is selected. The easy-to-read display means also reduce the risk of errors when hiring.
Selbstverständlich kann gegebenenfalls auf den ringrörmigen Teil 14 und die damit verbundene Feineinstellbarkeit verzichtet werden und der Anschlagteil 17 fest mit der Zylinderhülse 11 verbunden sein. Auch kann der Anschlagteil 17 an Stelle des Anschlags 26 stufenförmig ausgebildet sein und mit einem geeigneten festen Anschlag 26 zusammenwirken. Schliesslich können auch die Anzeige mittel für die gegenseitige Winkellage der Anschläge bzw. die Feinverstellung des einen der Anschläge in einer dem Fachmann geläufigen anderen Form ausgeführt werden. Of course, the ring-shaped part 14 and the associated fine adjustability can optionally be dispensed with and the stop part 17 can be firmly connected to the cylinder sleeve 11. Instead of the stop 26, the stop part 17 can also be designed step-like and cooperate with a suitable fixed stop 26. Finally, the ad can means for the mutual angular position of the stops or the fine adjustment of one of the stops in another form familiar to the person skilled in the art.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zum Entnehmen einer bestimmten einstellbaren Flüssigkeitsmenge aus einem Flüssigkeitsbehälter , welche eine in einem Zylinder gleitbar angeordneten Kolben aufweist, wobei der Zylinder an einem Ende mit einem auf der Behälteröffnung befestigten Ventilblock verbunden ist und der Ventilblock mindestens einen mit einem Ansaugventil versehenen Ansaugkanal sowie mindestens einen mit einem Auslassventil versehenen Auslasskanal aufweist, welche Vorrichtung ferner mindestens einen Axialrichtung festen Anschlag und einen zur Begrenzung des Kolbenhubes mit dem festen Anschlag zusammenwirkenden, in Axialrichtung beweglichen Anschlag besitzt, wobei zumindest einer der Anschläge mit dem Zylinder verbunden ist und ein anderer Anschlag von einer Zylinderhüise getragen wird,die den Zylinder koaxial umgibt und gegenüber diesem in Axialrichtung bewegbar ist, wobei ein Ende der Zylinderhülse mit einem Ende des Kolbens verbunden ist, dadurch gekennzeichnet, dass einer der Anschläge (26) stufenförmig ausgebildet ist und im wesentlichen entlang einer zum Zylinder koaxialen Schraubenlinie verläuft und dass zumindest einer der Anschläge (17) in Umfangsrichtung des Zylinders verstellbar ist, derart, dass der den Kolbenhub begrenzende axiale Abstand zwischen den Anschlägen (17, 26) von deren gegenseitiger Winkellage bestimmt wird, und dass ferner Mittel zur Anzeige der besagten Winkellage bzw. der dieser entsprechenden anzusaugenden und abzugebenden Flüssig keitsmenge mit den gegeneinander verstellbaren Teilen verbunden sind.1.Device for removing a certain adjustable amount of liquid from a liquid container, which has a piston slidably arranged in a cylinder, the cylinder being connected at one end to a valve block attached to the container opening and the valve block at least one suction channel provided with a suction valve and at least one has an exhaust port provided with an exhaust valve, the device also has at least one axial direction fixed stop and an axially movable stop which interacts with the fixed stop to limit the piston stroke, at least one of the stops being connected to the cylinder and another stop of one Cylinder sleeve is worn, which coaxially surrounds the cylinder and is movable relative to it in the axial direction, wherein one end of the cylinder sleeve is connected to one end of the piston, characterized in that one of the stops (26) is stepped and essentially along a helical line coaxial with the cylinder runs and that at least one of the stops (17) is adjustable in the circumferential direction of the cylinder, such that the axial distance between the stops (17, 26) that limits the piston stroke is determined by their mutual angular position, and that means are also provided to display the said angular position or the corresponding amount of liquid to be sucked in and dispensed are connected to the mutually adjustable parts.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die gegenseitige Winkellage der den Kolbenhub begrenzenden Anschläge (17, 26) über eine Rastvorrichtung (22, 23, 24a, 24b, etc.) einstellbar ist.2. Device according to claim 1, characterized in that the mutual angular position of the stops limiting the piston stroke (17, 26) via a latching device (22, 23, 24a, 24b, etc.) is adjustable.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der in Axialrichtung bewegbare Anschlag (17) in dieser Bewegungs richtung praktisch verdrehungssicher geführt ist.3. Device according to claim 2, characterized in that the axially movable stop (17) is guided in this direction of movement practically against rotation.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zur Anzeige der Winkellage einen Ziffernring und eine auf der Zylinderhülse angeordnete Einstellmarke (28) aufweisen, die in Umfangsrichtung der Zylinderhülse gegeneinander verstellbar sind.4. The device according to claim 1, characterized in that the means for displaying the angular position have a number ring and an arranged on the cylinder sleeve setting mark (28) which are mutually adjustable in the circumferential direction of the cylinder sleeve.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass einer der beiden Anschläge (17) in seinem axialen Abstand zum anderen Anschlag (26) feinverstellbar ausgebildet ist; 5. The device according to claim 1, characterized in that one of the two stops (17) is finely adjustable in its axial distance from the other stop (26);
PCT/EP1982/000121 1981-06-09 1982-06-09 Device for withdrawing a determined amount of liquid from a container WO1982004409A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH375381A CH643145A5 (en) 1981-06-09 1981-06-09 DEVICE FOR COLLECTING A PREDETERMINED AND ADJUSTABLE VOLUME OF LIQUID IN A CONTAINER.
CH3753/81810609 1981-06-09

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WO1982004409A1 true WO1982004409A1 (en) 1982-12-23

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DE (1) DE3221438A1 (en)
WO (1) WO1982004409A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339614A2 (en) * 1988-04-26 1989-11-02 Walu-Apparatetechnik Gmbh Bottle dispenser
WO2003020436A1 (en) * 2001-09-04 2003-03-13 Boehringer Ingelheim International Gmbh Locking-tensioning mechanism for a miniaturised high-pressure atomiser
US6945472B2 (en) 2001-09-04 2005-09-20 Boehringer Ingelheim International Gmbh Locking-stressing mechanism for a miniaturised high pressuriser

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534550A1 (en) * 1985-04-02 1986-10-09 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Precision metering appliance with digital display device
DE3516596A1 (en) * 1985-04-02 1986-10-02 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Precision dosing apparatus with a digital display device
GB8614850D0 (en) * 1986-06-18 1986-07-23 Jencons Scient Ltd Liquid dispensers
ITFI20010232A1 (en) * 2001-12-03 2003-06-03 Cesare Signorini A DOSER FOR SYRUP AND OTHER FLUIDS
DE102008015745A1 (en) * 2008-03-20 2009-09-24 Möller, Mike Dosing pump for dispensing tomato sauce from glass container, has fixed tube provided with winding to screw cover for glass container with fluid-type food, and discharge unit opened and closed with aroma protective cap
CH709451A1 (en) 2014-03-31 2015-10-15 Capartis Ag Metering device for a liquid feed from a container or hose with nozzle.
WO2016155757A2 (en) 2015-03-27 2016-10-06 Capartis Ag Dosing device for a liquid supply comprising a neck
DE102017105536A1 (en) 2017-03-15 2018-09-20 Samir Adanalic Dosing device and liquid container

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1917678A (en) * 1930-02-15 1933-07-11 Elizabeth Wheeler Adjustable positive-measuring pump
DE957189C (en) * 1951-02-21 1957-01-31 Walter Schulte Measuring cylinder for liquids
GB867963A (en) * 1958-12-15 1961-05-10 Lewis Berger & Sons Ltd Improvements in or relating to metering dispensing devices
FR2341134A1 (en) * 1976-02-12 1977-09-09 Roach William DEVICE FOR DELIVERING A LIQUID IN PREDETERMINED QUANTITIES
US4081111A (en) * 1976-10-12 1978-03-28 Plasteco, Inc. Adjustable volume setting mechanism for repeatable fluid discharge device
FR2383704A1 (en) * 1977-03-15 1978-10-13 Labora Mannheim Gmbh HAND PIPETTE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802608A (en) * 1972-04-10 1974-04-09 Packard Instrument Co Inc Liquid metering device with concentric pistons and unidirectional liquid flow
DE7331461U (en) * 1973-08-30 1975-04-24 Brand R Bottle dispenser
US4273257A (en) * 1977-07-18 1981-06-16 Sherwood Medical Industries Inc. Jar mounted pipettor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1917678A (en) * 1930-02-15 1933-07-11 Elizabeth Wheeler Adjustable positive-measuring pump
DE957189C (en) * 1951-02-21 1957-01-31 Walter Schulte Measuring cylinder for liquids
GB867963A (en) * 1958-12-15 1961-05-10 Lewis Berger & Sons Ltd Improvements in or relating to metering dispensing devices
FR2341134A1 (en) * 1976-02-12 1977-09-09 Roach William DEVICE FOR DELIVERING A LIQUID IN PREDETERMINED QUANTITIES
US4081111A (en) * 1976-10-12 1978-03-28 Plasteco, Inc. Adjustable volume setting mechanism for repeatable fluid discharge device
FR2383704A1 (en) * 1977-03-15 1978-10-13 Labora Mannheim Gmbh HAND PIPETTE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339614A2 (en) * 1988-04-26 1989-11-02 Walu-Apparatetechnik Gmbh Bottle dispenser
EP0339614A3 (en) * 1988-04-26 1990-09-26 Walu-Apparatetechnik Gmbh Bottle dispenser
WO2003020436A1 (en) * 2001-09-04 2003-03-13 Boehringer Ingelheim International Gmbh Locking-tensioning mechanism for a miniaturised high-pressure atomiser
US6945472B2 (en) 2001-09-04 2005-09-20 Boehringer Ingelheim International Gmbh Locking-stressing mechanism for a miniaturised high pressuriser
US7726588B2 (en) 2001-09-04 2010-06-01 Boehringer Ingelheim International Gmbh Locking-tensioning mechanism for a miniaturised high pressuriser

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DE3221438A1 (en) 1982-12-23
CH643145A5 (en) 1984-05-30

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