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A pipetting device comprises a retaining cone for holding a slip-on pipette tip and a piston chamber, which communicates with a passage of the retaining cone and contains a reciprocable piston, which acts on the pipette tip that has been fitted on the retaining cone. A filter is provided in the asse

A pipetting device comprises a retaining cone for holding a slip-on pipette tip and a piston chamber, which communicates with a passage of the retaining cone and contains a reciprocable piston, which acts on the pipette tip that has been fitted on the retaining cone. A filter is provided in the assembly and consists of an aerosol-retaining filter that is detachably mounted in a region which includes the lower end of the pipetting device (1), including the retaining cone (8), as well as the upper end portion of the pipette tip (10) below the retaining cone. The filter may be designed in various ways and may have a progressive filter action. The filter may be arranged in the lower end portion of the retaining cone (8) or in the pipette tip (10) or in an interposed member.

대표청구항 ▼

A pipetting device, comprising: a body having an upper end and a lower end and defining a cylinder chamber; a piston guidable and reciprocable in the cylinder chamber; means for operating the piston; a retaining cone arranged at the lower end of and having a capillary passage extending from the cyli

A pipetting device, comprising: a body having an upper end and a lower end and defining a cylinder chamber; a piston guidable and reciprocable in the cylinder chamber; means for operating the piston; a retaining cone arranged at the lower end of and having a capillary passage extending from the cylinder chamber to an end face of the retaining cone; a pipette tip fitted to the retaining cone and having an open pointed lower end; and an aerosol filter detachably arranged in a region defined by the lower end of the body where the retaining cone is provided and an upper end portion of the pipette tip arranged below the retaining cone, the filter having only labyrinth-like passages and baffle surfaces, the baffle surfaces consisting of a material which adhesively reacts with substances in a fluid flowable through the filter.