Patent ID: 6685054
Filing Date: 2004-02-03
Classification: B67D

Abstract:
A liquid delivery apparatus equipped with a liquid delivery line which can deliver liquids different from each other in a property such as density, viscosity, or the like,wherein a flow regulation means is provided in said liquid delivery line, said flow regulation means comprising: a body having an inflow port into which said liquid flows and an outflow port out of which said liquid flows; rotators rotatable within the body to move said from said inflow port to said outflow port by given volumes along the internal wall of said body and to continuously deliver said liquid from said outflow port to said liquid delivery line; and a drive unit for driving said rotators, wherein the drive unit comprises; a drive motor for driving said rotators; and a control unit for controlling current to said drive motor so that said rotators rotate at a given speed, and wherein said control unit comprises; a memory for housing a reference voltage by which said rotators are in a stable rotational condition; a comparing unit for comparing a difference between a derive voltage which is supplied when driving said drive motor with said reference voltage; and a power source unit for controlling current to said drive motor based on said difference to cause said rotators to be in said stable rotational condition.