Patent ID: 6682601
Filing Date: 2004-01-27
Classification: B05C

Abstract:
A fluid dispensing system having an electronic controller constructed and programmed to activate and drive a piston to dispense a precise and accurate amount of fluid from an output, the fluid dispensing system comprising:a motor and corresponding drive rod arranged wherein the drive rod moves relative to the motors, the drive rod defining an axis, means for activating the motor, means for attaching the drive rod to the piston such that the drive rod and the piston move as a unit together in the forward and reverse axial directions, means for producing a signal to activate the motor to drive the rod and piston axially to dispense a given quantity of fluid, means for stopping the motor for a delay time, and means for reversing the direction of the axial motion of the rod and piston to overcome backlash in the motor, rod and piston mechanism and to back off the piston thereby preventing leakage.