Liquid metering device

Details Liquid metering device Liquid metering device

G - Physics

01

F

103/31, 128/91

G01F 11/08 (2006.01) B01L 99/00 (2010.01) G01N 1/14 (2006.01)

Patent

CA 1288283

ABSTRACT A liquid metering unit comprising a conduit of flexible material depending between first and second rotatable rollers, each having first and second curved surfaces and first and second flat portions. The rollers are driven in opposite directions so that their first curved surfaces impinge upon the conduit, constricting it and causing it to move upwards along its longitudinal axis such that any liquid contained therein is expelled from its lower end. Continued rotation of the rollers presents the second flat portions to the conduit, which is released and drops back to its original position. The conduit is recharged with liquid from a reservoir connected to its upper end by means of a vacuum source selectively connectable to its lower end.

528817

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