US 9,808,796 B2
Pipette and method for pipetting
Matthias Grabosch, Bovenden (DE)
Assigned to Sartorius Lab Instruments GmbH & Co. KG, Goettingen (DE)
Filed by Sartorius Lab Instruments GmbH & Co. KG, Goettingen (DE)
Filed on May 13, 2015, as Appl. No. 14/711,048.
Application 14/711,048 is a continuation of application No. PCT/EP2013/003373, filed on Nov. 8, 2013.
Claims priority of application No. 10 2012 022 121 (DE), filed on Nov. 13, 2012.
Prior Publication US 2015/0238953 A1, Aug. 27, 2015
Int. Cl. B01L 3/02 (2006.01); G01N 1/14 (2006.01)
CPC B01L 3/0217 (2013.01) [B01L 3/021 (2013.01); B01L 3/0203 (2013.01); B01L 3/0206 (2013.01); B01L 3/0293 (2013.01); B01L 2200/141 (2013.01); G01N 2001/1427 (2013.01); G01N 2001/1436 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pipette comprising:
a first chamber, arranged in a housing, and
a second chamber, also arranged in the housing, which connects to the first chamber and extends through an outlet channel to a pipette tip,
wherein the first and second chambers are separated from one another by a longitudinally displaceable piston having a piston non-return valve,
wherein the second chamber comprises a chamber non-return valve, which is arranged upstream of the outlet channel,
wherein the first chamber is configured to be filled with liquid via a direct feed line,
wherein the first chamber is connected via the feed line and an outlet line to a storage tank for the liquid, and
wherein the feed line, the outlet line, and the storage tank form a recirculation circuit for the liquid.