Pipette and method for pipetting
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United States of America Patent
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Nov 7, 2017
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N/A
app pub date -
May 13, 2015
filing date -
Nov 13, 2012
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Abstract
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.
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