EP 2885079 A1 20150624 - PIPETTE WITH ELECTRIC MOTOR-DRIVEN PISTON AND MAGNETIC FIELD SHIELD
Title (en)
PIPETTE WITH ELECTRIC MOTOR-DRIVEN PISTON AND MAGNETIC FIELD SHIELD
Title (de)
PIPETTE MIT ELEKTROMOTORISCH ANGETRIEBENEM KOLBEN UND MAGNETFELD-ABSCHIRMUNG
Title (fr)
PIPETTE À PISTON ENTRAÎNÉ PAR MOTEUR ÉLECTRIQUE AVEC BLINDAGE MAGNÉTIQUE
Publication
Application
Priority
- DE 102012214677 A 20120817
- EP 2013067179 W 20130816
Abstract (en)
[origin: WO2014027100A1] The invention relates to a pipetting device (10) with a piston-cylinder system (16) comprising a cylinder (18) extending along a cylinder axis (Z), a piston (20) and a working chamber (42) delimited by the cylinder (18) and the piston (20) and filled with a working fluid, for changing, by means of relative movement of the piston (20) relative to the cylinder (18) along a relative movement path (B), a pressure of the working fluid at a coupling point (at 34) that is designed for coupling to a pipetting tip (38) and is connected (at 44) to the working chamber (42) so as to transmit pressure. The piston (20) is drivable by a linear motor for relative movement relative to the cylinder (18) and has at least one piston magnet arrangement (24) for this purpose and at least one cylinder magnet arrangement (30) is further provided on the cylinder (18). At least one magnet arrangement (24, 30) consisting of the piston magnet arrangement (24) and the cylinder magnet arrangement (30) comprises a series of electromagnets (26) which can be energized by means of a control device (28) of the pipetting device (10) to produce a magnetic field moving along the relative movement path (B) in order thereby to provide the mechanical driving force necessary for effecting the relative movement. Radially outside the piston magnet arrangement (24) and the cylinder magnet arrangement (30), the pipetting device (10) has a magnetic shield (32) which attenuates, in comparison to a situation without a shield (32), the magnetic field present radially outside the location of the shield, the magnetic field originating from at least one magnet arrangement (24, 30) consisting of the piston magnet arrangement (24) and the cylinder magnet arrangement (30).
IPC 8 full level
B01L 3/02 (2006.01); F04B 17/04 (2006.01)
CPC (source: EP)
B01L 3/0227 (2013.01); H01F 7/1607 (2013.01); B01L 2400/043 (2013.01)
Citation (search report)
See references of WO 2014027100A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014027100 A1 20140220; DE 102012214677 A1 20140220; EP 2885079 A1 20150624; EP 2885079 B1 20171018; EP 3216524 A1 20170913; EP 3216524 B1 20181107; ES 2705438 T3 20190325; ES 2705438 T8 20190704; NO 2925906 T3 20180224
DOCDB simple family (application)
EP 2013067179 W 20130816; DE 102012214677 A 20120817; EP 13750565 A 20130816; EP 17167647 A 20130816; ES 17167647 T 20130816; NO 13857823 A 20131024