DE2159541A1 - Automatic pipette nozzle ejector - for radiochemical laboratories - Google Patents

Automatic pipette nozzle ejector - for radiochemical laboratories

Info

Publication number
DE2159541A1
DE2159541A1 DE19712159541 DE2159541A DE2159541A1 DE 2159541 A1 DE2159541 A1 DE 2159541A1 DE 19712159541 DE19712159541 DE 19712159541 DE 2159541 A DE2159541 A DE 2159541A DE 2159541 A1 DE2159541 A1 DE 2159541A1
Authority
DE
Germany
Prior art keywords
pipette
tip
radiochemical
laboratories
nozzle
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.)
Pending
Application number
DE19712159541
Other languages
German (de)
Inventor
Karl Lebling
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.)
LABOTRON MESSTECHNIK GmbH
Original Assignee
LABOTRON MESSTECHNIK 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 LABOTRON MESSTECHNIK GmbH filed Critical LABOTRON MESSTECHNIK GmbH
Priority to DE19712159541 priority Critical patent/DE2159541A1/en
Publication of DE2159541A1 publication Critical patent/DE2159541A1/en
Pending legal-status Critical Current

Links

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
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type

Abstract

The nozzle is of liquid repellent material and has a tapered top which is tight push fit in a corresponding tapered hole at the end of the pipette barrel, the fit being tight enough to be readily detected by the end of the plunger piston when it comes in contact, during normal use. By exerting extra force on the plunger the nozzle is ejected. The nozzle is not touched by the operator.

Description

Piperriervorrichtung mit automatischem Pipettenauswerfmechanismus Die Erfindung betrifft allgemein das automatische Auswerfen von Pipettenspitzen, wie sie z.B. bei Piperrriergeräten nach Fig, 1 verwendet werden. Bei den bisher bekannte Vorrichtungen mußte die gebrauchte Pipettenspitze von Hand von der Vorrichtung entfernt werden. Pipette device with automatic pipette ejection mechanism The invention relates generally to the automatic ejection of pipette tips, such as are used, for example, in piping devices according to FIG. With the so far known devices had to remove the used pipette tip by hand from the device removed.

Bei Verwendung solcher Pipettiergeräte im klinischen Labor ist die Gefahr der Ansteckung durch Berühren der gebrauchten Spitze gegeben. Bei Verwendung zur Dosierung radioaktiver Flüssigkeiten besteht bei direkter Berührung die Gefahr radioaktiver Verseuchung.When using such pipetting devices in the clinical laboratory, the There is a risk of infection by touching the used tip. Using Direct contact with the metering of radioactive liquids poses a risk radioactive contamination.

Die Erf;ndung begegnet diesen Gefahren dadurch, daß die Pipettenspitze nicht mehr von Hand, sondern beflihrungslos ausgeworfen wird. The invention counteracts these dangers in that the pipette tip is no longer ejected by hand, but without control.

Der dazu notwendige Mechanismus wird wie folgt beschrieben Der Saugkolben 3, der zum Aufsaugen der zu pipettierenden Ftliissig keit 7dient, start am Ende seines Förderhubes, beim AusstoPen der Flüssigkeit am oberen Rand der Pipettenspitze 1 an. Diese Spitze aus flüssigkeitsabstoßendem Kunststoff hemmt die Abwärtsbewegung des Kolbens 3, weil sie luftdicht im Zylinder 5 sitzt. The mechanism required for this is described as follows: The suction piston 3, which is used to suck up the liquid to be pipetted, starts at the end its delivery stroke when the liquid is expelled at the upper edge of the pipette tip 1 at. This tip made of liquid-repellent plastic prevents the downward movement of the piston 3 because it sits in the cylinder 5 in an airtight manner.

Der luftdichte Abschluß wird durch einen Außenkonus auf der Pinettenspitze 1 erreicht, welcher in einem geeigneten Innenkonus des Zylinders 5 die Dichtheit und gleichzeitig einen festen Sitz erzeugt. Zur Lösung dieser Verbindung muß eine erhöhte Kraft auf den Kolben 3 mittels der Kolbenstange 6 aufgewendet werden. Der obere Rand der Pipette 1 dient also zugleich als Anschlag für de Abwärtsbewegung des Kolbens 3, wodurch ein unbeabsichtigtes Auswerfen der Spitze 1 verhindert wird. The airtight seal is created by an outer cone on the tip of the pinette 1 reached, which in a suitable inner cone of the cylinder 5, the tightness and at the same time creates a tight fit. To solve this connection a increased force can be applied to the piston 3 by means of the piston rod 6. Of the The upper edge of the pipette 1 thus also serves as a stop for the downward movement of the plunger 3, thereby preventing the tip 1 from being accidentally ejected.

Claims (3)

Ansprüche Expectations O Vorrichtung zum berührungslosen Auswerfen Von Pipettenspitzen aus Pipettiergeräten, dadurch gekennzeichnet, daß die Spitze von Hubkolben oder einem anderen beweglichen Element aus ihrer Verbindung mit der Vorrichtung gelost wird und dadurch ein Abnehmen von Hand oder mit einer zusätzlichen Vorrichtung, nuperhalb der eigentli.chen Pipettiervorrichtung, entfällt.O Device for contactless ejection from pipette tips Pipetting devices, characterized in that the tip of a reciprocating piston or a other movable element is released from its connection with the device and thereby a removal by hand or with an additional device, nuperhalb the actual pipetting device is omitted. 2) Vorrichtung nach Anspruch 1 dadurch geeknnzeichnet, daß die Pipettenspitze aus flüssigkeitsabstoßendem Kunststoff besteht und mit einem Außenkonus versehen ist, mit Hilfe dessen sie in einem entsprechenden Innenkonus der Pipettenvorrichtung eine dichte Verbindung herstellt. 2) Device according to claim 1, characterized in that the pipette tip made of liquid-repellent plastic and provided with an outer cone is, with the help of which they are in a corresponding inner cone of the pipette device creates a tight connection. 3) Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, daß der Sitz der Pipettenspitze dem Auswerfen- einen spiirbaren Widerstand entgegensetzt, der durch einen erhöhten Kraftaufwand iiberwunden werden kann. Durch diese Maßnahme wird ein unbeabsichtigter Abwurf der Spitze verhindert. 3) Device according to claim 1, characterized in that the seat the pipette tip opposes a perceptible resistance to the ejection can be overcome by exerting an increased amount of force. By this measure this prevents the tip from being accidentally dropped. L e e r s e i t eL e r s e i t e
DE19712159541 1971-12-01 1971-12-01 Automatic pipette nozzle ejector - for radiochemical laboratories Pending DE2159541A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712159541 DE2159541A1 (en) 1971-12-01 1971-12-01 Automatic pipette nozzle ejector - for radiochemical laboratories

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712159541 DE2159541A1 (en) 1971-12-01 1971-12-01 Automatic pipette nozzle ejector - for radiochemical laboratories

Publications (1)

Publication Number Publication Date
DE2159541A1 true DE2159541A1 (en) 1973-06-07

Family

ID=5826690

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712159541 Pending DE2159541A1 (en) 1971-12-01 1971-12-01 Automatic pipette nozzle ejector - for radiochemical laboratories

Country Status (1)

Country Link
DE (1) DE2159541A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614085A1 (en) * 1985-12-12 1987-06-19 Hirschmann Glasgeraete PIPETTE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614085A1 (en) * 1985-12-12 1987-06-19 Hirschmann Glasgeraete PIPETTE
EP0232517A2 (en) * 1985-12-12 1987-08-19 Glasgerätebau Hirschmann Pipette
EP0232517A3 (en) * 1985-12-12 1988-06-22 Glasgeratebau Hirschmann Pipette

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