Patent ID: 7434484

Claim:
Pipetting device with a base body ( 2 ), at least one attachment ( 34 ) protruding from the base body ( 2 ) mounted axially movably on the base body ( 2 ) to mount a pipette tip ( 56 ), at least one spring ( 24 ) via which the at least one attachment ( 34 ) is supported on the base ( 2 ), and an ejection device ( 45 ) to release the pipette tip ( 56 ) from the at least one attachment ( 34 ) which comprises a throw-off device ( 51 ) associated with the at least one attachment ( 34 ), the at least one attachment ( 34 ) and throw-off device ( 51 ) being movable relative to one another and the ejection device ( 45 ) further comprising a drive device ( 46 , 47 , 48 ), the drive device ( 46 , 47 , 48 ) cooperating with the throw-off device ( 51 ) and/or the at least one attachment ( 34 ) for the relative movement of the throw-off device ( 51 ) and the at least one attachment ( 34 ), the throw-off device including a stop ( 59 ) associated with the at least one attachment ( 34 ) beyond which the attachment ( 34 ) protrudes axially, when it is not loaded toward the spring ( 24 ), and against which the pipette tip ( 56 ) abuts when pushed on the at least one attachment ( 34 ).