Patent ID: 8661920

Claim:
A handheld pipetting apparatus for metering liquids, with a handleable pipette housing ( 1 ), at least one accommodation ( 4 ) for a fastening portion ( 5 ) of a syringe cylinder ( 8 ) of a syringe ( 6 ), at least one plunger accommodation ( 11 ) in an accommodation body ( 10 ) for a plunger fastening portion of a syringe plunger ( 12 ) of the syringe ( 6 ), fastening means ( 19 , 28 ) for detachably holding the fastening portion ( 6 ) in the accommodation ( 4 ) and the plunger fastening portion ( 29 ) in the plunger accommodation ( 11 ), at least one displacement device ( 52 ) with a displacement chamber ( 53 ) and a shiftable chamber wall ( 54 ) limiting the same, for displacing a fluid; at least one seat ( 56 ) for detachably holding a pipette point, a channel ( 58 ), connecting a hole ( 57 ) in the seat ( 56 ) with a displacement chamber ( 53 ), and at least one drive device ( 44 ), which is connected to with the accommodation body ( 10 ), for shifting the accommodation body ( 10 ) with respect to the accommodation ( 4 ), or the chamber wall ( 54 ) with respect to the displacement chamber ( 53 ), wherein at the one side, the displacement device ( 50 ) has an adapter housing ( 48 ) with a fastening portion ( 50 ) for fastening in the accommodation ( 4 ) and an actuation member ( 55 ), connected to the shiftable chamber wall ( 54 ), for insertion into the plunger accommodation ( 11 ), and at least one seat ( 56 ) for a pipette point on the opposing side wherein the drive device ( 44 ) is an electric drive device, wherein at least one reading device for reading a tag on a syringe ( 6 ) which includes properties of the syringe ( 6 ) or a tag on an adapter housing ( 48 ) which includes properties of the pipette point is associated to the accommodation ( 4 )and the reading device is connected to an electronic analyzing unit arranged in the pipette housing ( 1 ), which is connected to an electronic control device of the electric drive device ( 44 ), in order to control the same depending on the tag read by the reading device, wherein the control device controls a correction of the stroke of the shiftable chamber wall ( 54 ) by means of the electric drive device, depending on the read or input tag of a pipette point ( 60 ), and wherein by means of the electric analyzing device, the control device controls an initial positioning of the shiftable chamber wall ( 54 ) into a position which is remote about a residual stroke from the end position for complete fluid discharge, depending on the read tag of a pipette point ( 60 ).