PIPETTE AND METHOD OF PIPETTING

A pipette has a first chamber and a second chamber that connects to the first chamber and extends with an outlet channel to a pipette tip. The chambers are separated from one another by a longitudinally displaceable piston having a piston non-return valve. The second chamber has a chamber non-return...

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Bibliographische Detailangaben
1. Verfasser:	GRABOSCH, Matthias
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE NOZZLES PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL TRANSPORTING
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Beschreibung
Zusammenfassung:	A pipette has a first chamber and a second chamber that connects to the first chamber and extends with an outlet channel to a pipette tip. The chambers are separated from one another by a longitudinally displaceable piston having a piston non-return valve. The second chamber has a chamber non-return valve which is arranged upstream of the outlet channel. An associated method includes recirculating the liquid in the first chamber, filling the first chamber with the liquid via a direct feed line, filling the second chamber with the liquid from the first chamber by pulling back the piston in the filling position toward the first chamber with the piston non-return valve open and with the chamber non-return valve closed, and emptying the second chamber by advancing the piston in the emptying position towards the outlet channel, with the piston non-return valve closed and the chamber non-return valve open.