An adjustable volume pipetting device comprising a barrel assembly and a plunger assembly, including a plunger wire, and so constructed that the length of the plunger wire stroke is adjustable while retaining a fixed relationship between the end of the plunger wire and the end of a capillary tube. The...http://www.google.com/patents/US4098125?utm_source=gb-gplus-sharePatent US4098125 - Adjustable volume pipetting device
