LIQUID HANDLING EQUIPMENT

摘要

A pipette [1] is equipped with a jet [10] and handpiece [6]. A piston assembly, housed within the pipette [1], at one end has a seal [9] affixed to a rigid section [2] which extends to a flexible section [4]. At the junction of the rigid [2] and flexible [4] sections is an enlarged shoulder [7]. The flexible section [4] extends through the handpiece [6]. A movable sleeve [3] is positioned between the flexible section [4] of the piston rod assembly and the interior wall [11] of the pipette. At one end, the sleeve [3] passes over the shoulder [7] of the piston assembly and terminates in a constriction [8], The other end of the sleeve [3] extends from the open end of the pipette [1] and terminates in a shoulder [5] of an external diameter greater than the bore diameter of the pipette [1].