Patent ID: 6117396
Filing Date: 2000-09-12
Classification: B01J,B01L,C40B,G01N,Y10T

Abstract:
A liquid dispensing device for delivering defined volumes of a liquid comprising:(a) a reagent fill channel of first cross-sectional dimensions;(b) one or more metering capillaries of second cross-sectional dimensions(i) connected to the reagent fill channel, and(ii) having an exit; and(c) one or more sources of gas connected to the reagent fill channel,wherein the first cross-sectional dimensions are such that after the one or more metering capillaries are filled from the reagent fill channel, the reagent fill channel is drained of liquid without applying a pressure effective to drain liquid in the one or more metering capillaries, and wherein the source of gas is adapted to apply pressure to eject the liquid in the metering capillaries; and wherein a metered amount of liquid is dispensed by said ejection.