WO1982004409A1 - Dispositif pour prelever une quantite determinee de liquide d'un recipient - Google Patents

Dispositif pour prelever une quantite determinee de liquide d'un recipient 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
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
stops
stop
piston
adjustable
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.)
Ceased
Application number
PCT/EP1982/000121
Other languages
German (de)
English (en)
Inventor
Sa Pharmed
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1982004409A1 publication Critical patent/WO1982004409A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B01L3/0282—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.

Landscapes

  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Le piston (1) glisse dans le cylindre (2) qui est fixe au bloc de soupapes (5) au moyen d'un manchon (3). La course du piston (1) est limitee de facon reglable par une butee amovible (17) qui est maintenue sur l'enveloppe cylindrique (11) et guidee au moyen d'un bec (22) engage dans des rainures (24a, 24b, 24c...), jusqu'a ce que sa surface de butee (27) touche une surface correspondante (25a, 25b, 25c) d'une butee fixe (260). Par rotation de l'enveloppe cylindrique (11) par rapport au manchon fixe (3), le bec (22) passe d'une rainure de guidage a l'autre ce qui modifie la course du piston (1). Des signes portes par le manchon (3) et visibles a travers une fenetre (28) de l'enveloppe cylindrique (11) indiquent le volume aspire pour chaque position angulaire de l'enveloppe (11). Le dispositif presente l'avantage d'une meilleure manipulation et d'une plus grande precision du dosage de la quantite de liquide prelevee par rapport aux dispositifs connus.
PCT/EP1982/000121 1981-06-09 1982-06-09 Dispositif pour prelever une quantite determinee de liquide d'un recipient Ceased WO1982004409A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3753/81810609 1981-06-09
CH375381A CH643145A5 (fr) 1981-06-09 1981-06-09 Dispositif pour prelever un volume predetermine et reglable de liquide dans un recipient.

Publications (1)

Publication Number Publication Date
WO1982004409A1 true WO1982004409A1 (fr) 1982-12-23

Family

ID=4262751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1982/000121 Ceased WO1982004409A1 (fr) 1981-06-09 1982-06-09 Dispositif pour prelever une quantite determinee de liquide d'un recipient

Country Status (3)

Country Link
CH (1) CH643145A5 (fr)
DE (1) DE3221438A1 (fr)
WO (1) WO1982004409A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339614A3 (fr) * 1988-04-26 1990-09-26 Walu-Apparatetechnik Gmbh Dispensateur de bouteilles
WO2003020436A1 (fr) * 2001-09-04 2003-03-13 Boehringer Ingelheim International Gmbh Mecanisme tendeur a blocage pour atomiseur haute pression miniaturise
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 (de) * 1985-04-02 1986-10-09 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Praezisionsdosiergeraet mit digitaler anzeigevorrichtung
DE3516596A1 (de) * 1985-04-02 1986-10-02 Walter Graf U. Co Gmbh & Co, 6980 Wertheim Praezisionsdosiergeraet mit digitaler anzeigevorrichtung
GB8614850D0 (en) * 1986-06-18 1986-07-23 Jencons Scient Ltd Liquid dispensers
ITFI20010232A1 (it) * 2001-12-03 2003-06-03 Cesare Signorini Un dosatore per sciroppi ed altri fluidi
DE102008015745A1 (de) * 2008-03-20 2009-09-24 Möller, Mike Universaldosierpumpe mit Aromaschutz
CH709451A1 (de) 2014-03-31 2015-10-15 Capartis Ag Dosiervorrichtung für eine Flüssigkeitszufuhr aus einem Behälter oder Schlauch mit Stutzen.
WO2016155757A2 (fr) 2015-03-27 2016-10-06 Capartis Ag Dispositif de dosage pour un acheminement de liquide avec raccord
DE102017105536A1 (de) 2017-03-15 2018-09-20 Samir Adanalic Dosiervorrichtung und Flüssigkeitsbehälter

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 (de) * 1951-02-21 1957-01-31 Walter Schulte Messzylinder fuer Fluessigkeiten
GB867963A (en) * 1958-12-15 1961-05-10 Lewis Berger & Sons Ltd Improvements in or relating to metering dispensing devices
FR2341134A1 (fr) * 1976-02-12 1977-09-09 Roach William Dispositif servant a delivrer un liquide en quantites predeterminees
US4081111A (en) * 1976-10-12 1978-03-28 Plasteco, Inc. Adjustable volume setting mechanism for repeatable fluid discharge device
FR2383704A1 (fr) * 1977-03-15 1978-10-13 Labora Mannheim Gmbh Pipette a main

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
DE2343687C3 (de) * 1973-08-30 1982-02-11 Rudolf Brand GmbH & Co, 6980 Wertheim Flaschendispenser zur Abgabe von Flüssigkeit
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 (de) * 1951-02-21 1957-01-31 Walter Schulte Messzylinder fuer Fluessigkeiten
GB867963A (en) * 1958-12-15 1961-05-10 Lewis Berger & Sons Ltd Improvements in or relating to metering dispensing devices
FR2341134A1 (fr) * 1976-02-12 1977-09-09 Roach William Dispositif servant a delivrer un liquide en quantites predeterminees
US4081111A (en) * 1976-10-12 1978-03-28 Plasteco, Inc. Adjustable volume setting mechanism for repeatable fluid discharge device
FR2383704A1 (fr) * 1977-03-15 1978-10-13 Labora Mannheim Gmbh Pipette a main

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339614A3 (fr) * 1988-04-26 1990-09-26 Walu-Apparatetechnik Gmbh Dispensateur de bouteilles
WO2003020436A1 (fr) * 2001-09-04 2003-03-13 Boehringer Ingelheim International Gmbh Mecanisme tendeur a blocage pour atomiseur haute pression miniaturise
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

Also Published As

Publication number Publication date
CH643145A5 (fr) 1984-05-30
DE3221438A1 (de) 1982-12-23

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