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1. WO2000019211 - DEVICE FOR POSITIONING A PIPETTING NEEDLE

Publication Number WO/2000/019211
Publication Date 06.04.2000
International Application No. PCT/EP1999/007008
International Filing Date 20.09.1999
Chapter 2 Demand Filed 09.11.1999
IPC
G01N 35/10 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/-G01N33/148; Handling materials therefor
10Devices for transferring samples to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
CPC
G01N 2035/1018
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
10Devices for transferring samples ; or any liquids; to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
1009Characterised by arrangements for controlling the aspiration or dispense of liquids
1016Control of the volume dispensed or introduced
1018Detecting inhomogeneities, e.g. foam, bubbles, clots
G01N 2035/1025
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
10Devices for transferring samples ; or any liquids; to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
1009Characterised by arrangements for controlling the aspiration or dispense of liquids
1025Fluid level sensing
G01N 35/1016
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
35Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
10Devices for transferring samples ; or any liquids; to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
1009Characterised by arrangements for controlling the aspiration or dispense of liquids
1016Control of the volume dispensed or introduced
Applicants
  • F. HOFFMANN-LA ROCHE AG [CH]/[CH] (AllExceptUS)
  • SCHMIDIGER, Willi [CH]/[CH] (UsOnly)
  • SIDLER, Thomas [CH]/[CH] (UsOnly)
  • ZWEIFEL, Heinrich [CH]/[CH] (UsOnly)
Inventors
  • SCHMIDIGER, Willi
  • SIDLER, Thomas
  • ZWEIFEL, Heinrich
Agents
  • AMMANN PATENTANWÄLTE AG BERN
Priority Data
98810984.930.09.1998EP
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) VORRICHTUNG ZUR POSITIONIERUNG EINER PIPETTIERNADEL
(EN) DEVICE FOR POSITIONING A PIPETTING NEEDLE
(FR) DISPOSITIF PERMETTANT DE POSITIONNER UNE AIGUILLE DE PIPETTE
Abstract
(DE) Vorrichtung zur Positionierung der Spitze (12) einer Pipettiernadel (11) bezüglich der Oberfläche (13) einer in einem Behälter (14) enthaltenen Flüssigkeit (15), wobei in der Flüssigkeit eventuell Blasen enthalten und/oder auf der Flüssigkeit Schaum (16) angeordnet sein können, umfassend einen Stelltrieb (19) für die Nadel (11) einschliesslich Motor (20) und zugeordneter Steuerung (21), einen HF-Generator zum Anlegen eines Hochfrequenzfeldes zwischen der Nadel (11) und einer Bodenplatte (24) unterhalb des Behälters (14), einen Sensor (25) zum Abgeben von primären Messwerten, die aus dem Hochfrequenzfeld abgeleitet werden, und einen Signalgeber zum Abgeben eines Endesignals, sobald die gewünschte Position der Nadel (11) erreicht ist, dadurch gekennzeichnet, dass der Sensor (25) zum Bereitstellen von Messwerten ausgebildet ist, die wenigstens zwei unterschiedlichen physikalischen Grössen entsprechen.
(EN) The invention relates to a device for positioning the tip (12) of a pipetting needle (11) in relation to the surface (13) of a liquid (15) located in a container (14), which liquid possibly contains bubbles and/or has foam (16) floating on it. The device comprises an adjustment mechanism (19) for the needle (11), including a motor (20) and a control (21) assigned thereto, a high-frequency generator for applying a high-frequency field between the needle (11) and a base plate (24) below the container (14), a sensor (25) for supplying primary measurement values derived from the high-frequency field, and a signal generator for emitting an end signal as soon as the needle (11) has reached its desired position. The device is characterized in that the sensor (25) is configured such as to provide measurement values which correspond to at least two different physical quantities.
(FR) L'invention concerne un dispositif permettant de positionner la pointe (12) d'une aiguille de pipette (11) par rapport à la surface (13) d'un liquide (15) contenu dans un contenant (14). Ce liquide contient éventuellement des bulles et/ou peut être recouvert de mousse (16). Ce dispositif comprend un mécanisme de réglage (19) destiné à l'aiguille (11), y compris un moteur (20) et un dispositif de commande (21) associé, un générateur HF permettant d'appliquer un champ haute fréquence entre l'aiguille (11) et une plaque de fond (24) située sous le contenant (14), un détecteur (25) permettant de fournir des valeurs mesurées primaires qui sont dérivées d'un champ haute fréquence et un émetteur de signaux permettant d'émettre un signal de fin dès que la position souhaitée de l'aiguille (11) est atteinte. Le dispositif est caractérisé en ce que le détecteur (25) est conçu pour préparer des valeurs mesurées qui correspondent à au moins deux grandeurs physiques différentes.
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