Low insertion force tip/mandrel

Details Low insertion force tip/mandrel Low insertion force tip/mandrel

2011-08-16

2011-08-16

Raevis, Robert R (Department: 2856)

Measuring and testing

Sampler, sample handling, etc.

Capture device

Reissue Patent

active

RE042606

ABSTRACT:
A pipette assembly for automatic pipetting machines including a stepped mandrel and tip for providing a minimum contact seal between the pipette tip and mandrel. The mandrel includes a first cylindrical portion with a first exterior diameter and a second cylindrical portion with a second exterior diameter. Raised bands on the first and second cylindrical portions contact the interior wall of the pipette tip to form seals. Because only a portion of the mandrel, specifically the seal portions, contacts the pipette tip, lower forces are required to insert the tip onto the mandrel.

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