Patent ID: 6589483
Filing Date: 2003-07-08
Classification: B01L,G01N,Y10T

Abstract:
A liquid dispenser comprising:a dispensing head comprising a plurality of plungers supported by a plunger plate, drive means for moving the plunger plate upwardly and downwardly, and a plurality of cylinders in which the plungers slidably fit; a plurality of nozzles arranged at lower ends of the cylinders and having configurations adapted to engage airtightly with openings in upper ends of dispensing tips, the plurality of nozzles being supported by a single nozzle holder, which is built to be detachable from said dispensing head; and means for attaching and detaching the nozzle holder comprising vertical clamp plates having clamps adapted to be engaged with lower edges of the nozzle holder, elastic members that normally bias the clamp plates upwardly, and means for pressing the clamp plates downwardly against an upward bias of the elastic members.