B - Operations – Transporting – 01 – L
Patent
B - Operations, Transporting
01
L
B01L 3/00 (2006.01) B01L 3/14 (2006.01) G01N 35/10 (2006.01)
Patent
CA 2017111
A pipetting insert (11) for a pipetting device for taking a liquid sample (12) from a vacuum tube (13) closed in air-tight manner by a stopper (14). In order to prevent undesirable escape of fragments of a sample from the vacuum tube before the sample is taken, the pipetting insert is characterised in that (a) it is made of a plastics, (b) it has an elongated body which has a conical part (15) at one end, a hollow tip (17) in the form of a wall (18) for piercing by a pipetting needle at the other end, and a central tubular part (16) therebetween, (c) the central part (16) of the body has a bore (21) along its longitudinal axis (Z-Z) for connecting the interior (22) of the conical part (15) to the interior (23) of the hollow tip (17), and (d) the outer wall (24) of the central part (16) of the body contains at least one connecting duct (25) which extends between the conical part (15) and the tip (17) and the cross-section of which is considerably smaller than the cross-section of the bore (21) in the central part (16) of the body.
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
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