Patent ID: 7981384
Filing Date: 2011-07-19
Classification: B01L,G01N,Y10T

Abstract:
1. A liquid aspirator system for aspirating liquid from a liquid container for containing the liquid therein, the liquid aspirator comprising: an open container; an aspirating pipette; a stepping motor for descending the aspirating pipette into the open liquid container; a liquid aspirating pump for supplying pressure for aspirating liquid through the aspirating pipette; a position detecting sensor for detecting the positioning the pipette at an initial position; a drive circuit unit for supplying a motor drive current to the stepping motor; and a controller for controlling the stepping motor and the liquid aspirating pump; the controller controls the stepping motor with N number of drive pulses to output a predetermined drive force to move the pipette from the initial position, where the drive pulse number N has been programmed into the controller in advance, where a distance from a tip of the pipette to a bottom of the open liquid container corresponds to a number of drive pulses N wherein the controller controls the liquid aspirating pump so that the liquid aspirating pump aspirates the liquid through the aspirating pipette that contacts the bottom of the open liquid container in the second position.