Patent ID: 7204163
Filing Date: 2007-04-17
Classification: B01L

Abstract:
1. A mechanical piston pipette, comprising a pipette body, a piston/cylinder assembly, the cylinder being arranged so as to be able to be equipped with a replaceable tip, and a tip ejector device, movable along the cylinder in order to eject a tip from the end of the cylinder, said pipette body accommodating an ejection actuation device, which is part of the tip ejector device, and a piston actuation device effecting given longitudinal translational travel between a low limit stop position and a high limit stop position in order to perform the aspiration of an adjustable volume of liquid, adjustment means of adjusting a pipetted volume by modifying said travel, mechanical means of displaying the pipetted volume and mechanical calibration means, wherein said adjustment means, said display means and said calibration means cooperate as an adjustment and calibration device in which, during a calibration operation, said display means are regulated so as to make the displayed volume equate with a pipetted real volume without modifying said travel, and wherein said adjustment and calibration device is housed inside the pipette body.