Patent ID: 7320260

Claim:
Pipetting device with a displacement device ( 36 ) with a displacement chamber ( 37 ) with a displaceable limiter ( 38 ), an attachment ( 34 ) for connecting to a pipette tip ( 56 ) and a connecting channel ( 44 ), the connecting channel ( 44 ) being between the displacement chamber ( 37 ) and the free end of the attachment ( 34 ), a drive device ( 6 , 7 , 8 ) for driving the displaceable limiter ( 38 ) of the displacement device ( 36 ) comprising a drive member ( 7 ), the drive member ( 7 ) being in releasable cooperation with the displaceable limiter ( 38 ), and a bayonet connection ( 19 , 22 , 30 , 31 ) between the drive device ( 6 , 7 , 8 ) and the displacement device ( 36 ), the bayonet connection ( 19 , 22 , 30 , 31 ) being established by creating the cooperation between the drive member ( 7 ) and the displaceable limiter ( 38 ) and the bayonet connection ( 19 , 22 , 30 , 31 ) being released by releasing the cooperation between the drive member ( 7 ) and the displaceable limiter ( 38 ).