G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 35/10 (2006.01) B01L 3/02 (2006.01) B01L 99/00 (2010.01) G01N 1/00 (2006.01) G01N 1/38 (2006.01) G01N 35/00 (2006.01)
Patent
CA 2476043
The invention relates to an automatic precision pipetting device. The inventive device comprises at least two cylinder/piston-type pumping units (1, 2), the rods of which are rotated by means of a common motor unit (MP). Moreover, the pumping chamber of each of the pumping units (1, 2) is connected to a circuit comprising, successively, a conduit that opens into a container of rinsing liquid (RL), three successive solenoid valves (EV¿1?, EV¿2?, EV¿3?) and a portion of circuit which connects the second solenoid valve (EV¿2?) with the pipetting means (AP). The larger pumping chamber is connected in the part of the circuit that provides the connection between the two solenoid valves (EV¿1?, EV¿2?) while the second pumping chamber is connected to the above-mentioned portion of circuit by means of a connector, said portion of circuit comprising a solenoid valve (EV¿3?) which is disposed between said connector and the aforementioned pipetting means. The invention is suitable for reagent reconstitution, in particular, in an automatic analysis device.
Le dispositif selon l'invention comprend au moins deux unités de pompage de type cylindre/piston (1, 2) dont les tiges sont entraînées en rotation par une motorisation commune (MP), la chambre de travail de chacune des unités de pompage (1, 2) étant connectée à un circuit comprenant successivement un conduit débouchant dans une réserve de liquide de rinçage (RL), trois électrovannes successives (EV1, EV2, EV3) et une portion de circuit reliant la deuxième électrovanne (EV2) à des moyens de pipetage (AP), la plus grande chambre de travail étant connectée dans la partie du circuit assurant la liaison entre les deux électrovannes (EV1, EV2) tandis que la deuxième chambre de travail est connectée à la susdite portion de circuit au moyen d'un raccord et que cette portion de circuit comprend une électrovanne (EV3) située entre ledit raccord et les susdits moyens de pipetage. Elle s'applique à la reconstitution de réactifs notamment dans un appareil d'analyse automatique.
Abou-Saleh Khaled
Rousseau Alain
Ridout & Maybee Llp
Stago Instruments
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