Patent ID: 8029742
Filing Date: 2011-10-04
Classification: B01L

Abstract:
1. A hand-held, electronic multi-channel pipettor comprising: a plurality of repositionable pipette tip fitting assemblies comprising pipette tip mounting shafts, each having a lower port being aligned along a line and having a range of motion along the line, the line being substantially horizontal when the pipettor is being used to aspirate or dispense; multiple aspiration cylinders and associated stationary ports through which air is aspirated into and out of the respective aspiration cylinders; a roller drum; and a plurality of flexible tubes, each flexible tube extending essentially from a stationary port for one of the aspiration cylinders to a port on one of the repositionable pipette tip fitting assemblies; and wherein at least one stationary port is located in the vicinity of the drum and is facing a direction that is substantially tangent to the outer surface of the drum, and further wherein the associated flexible tube wraps from the stationary port around the drum to the port on the repositionable tip fitting assembly for less than 180 degrees.