FIELD: the invention refers to pipettes for taking samples of liquid.
SUBSTANCE: the pipette for taking samples with a regulated volume has a body having a longitudinal axle, means for regulating the volume of liquid in the shape of an adjusting screw(5) fulfilled with possibility of turning for regulating the volume of the pipette, a push button(6) fixed to the upper end of the control rod, a blocking element(8) in the shape of a regulating knob to which a user can have an access through a window in the body of the pipette and which is fulfilled with possibility of travel between an active position in which turning influence applied to the knob is passed to the adjusting screw and a passive position in which that screw does not turn at displacement of the regulating knob , a connector(12) installed with slipping on the control rod and with possibility of rotating together with it and a driving element(38) fulfilled with possibility of displacement relatively to the adjusting screw(5) and precisely driven to it in radial direction. At that the blocking element(8) in the active position is fulfilled with possibility to transfer the movement by way of compulsory interaction from one of the two links differing from the element to another link of these two links and in the passive position - with possibility of averting realization of such transfer.
EFFECT: possibility to exclude casual undesirable changing of the taken volume of liquid.
15 cl, 19 dwg
