Gilson Sas

Bernard Roussel

Yves May

A shaft for a sampling pipette includes a first cylindrical portion, a first annular shoulder, and a second annular shoulder. A first cross section of the first cylindrical portion has a first diameter. The first annular shoulder includes a first transition end adjacent the first cylindrical portion and a second cylindrical portion. A second cross section of the second cylindrical portion has a second diameter. The second annular shoulder includes a second transition end adjacent the first annular shoulder and a third cylindrical portion. A third cross section of the third cylindrical portion has a third diameter. The third diameter is greater than the second diameter which is greater than the first diameter. The second diameter and the third diameter are selected so that a pipette tip contacts the second cylindrical portion and the third cylindrical portion when the pipette tip is mounted on the shaft.

Shaft for a sampling pipette

A device for use in a multi-channel pipetting system is provided. The device includes a body, a plurality of modules mounted to the body, a plurality of pistons mounted to a piston holder for simultaneous movement of the plurality of pistons in a first direction, and a guidance assembly. Each module includes an orifice connecting to an intake chamber. A piston extends into the intake chamber for movement in the first direction. The guidance assembly includes a first rotating element, a second rotating element, a shaft connecting the first rotating element to the second rotating element, and a first track and a second track extending parallel to the first direction. The shaft extends in a second direction orthogonal to the first direction. The first rotating element is mounted to roll along the first track, and the second rotating element is mounted to roll along the second track simultaneously with the plurality of pistons.

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Bondy, France

Bernard Roussel