Patent ID: 6123905
Filing Date: 2000-09-26
Classification: B01L,G01N

Abstract:
In combination:a pipettor, comprising:a body portion having a cylinder fitting end;a cylinder attached to the cylinder fitting end of the body portion, the cylinder having a tip fitting end and defining an interior chamber, the chamber having a cross-sectional area adjacent the tip fitting end, the tip fitting end having an opening with a cross-sectional area less than the cross-sectional area of the chamber adjacent the tip fitting end;a piston, the piston moving within the interior chamber of the cylinder and the body portion; anda filter plug disposed in the interior chamber of the cylinder between the opening and the piston, said filter plug having a cross-sectional area substantially equal to the cross-sectional area of the chamber adjacent the tip fitting end; anda pipette tip having an upper end and a lower end, and being in fluid communication at the upper end with the opening in the tip fitting end of the cylinder, the pipette tip and tip fitting end of the cylinder defining an unobstructed interior channel extending from the filter plug through the opening to the lower end of the pipette tip.