Electronic fluid dispenser
AssigneeFishman Corporation
InventorW. Scott Beebe
Life of this patent
Estimating the term…
Abstract
A programmable electronic fluid dispenser with computer controlled direct drives of a motor, connecting rod, and attached piston in a yringe is used to dispense accurate quantities of liquids with varying viscosities. The pistons are driven to dispense an amount and then the piston is reversed, overcoming any mechanical backlash, to prevent any leakage or oozing from the dispenser tip. A computer controls several dispensers cwith their outputs co-mingled. The desired proportions controlled by the computer driving the pistons.
Claims7
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.
Dependencies are inferred from the claim text.