Apparatus and system for precision dispensing of fluids and method of operating the same
First Claim
1. A fluid-dispensing system having, in combination, a fixed longitudinal screw shaft carrying in threaded engagement therewith, an electric motor assembly rotatably longitudinally incrementally movable therealong, the motor assembly integrally carrying a depending longitudinal tubular extension terminally provided with a plunger dimensioned to enter and slide within a fluid-containing syringe barrel into direct contact with the fluid therein as the motor assembly is moved along the fixed screw shaft;
- and a microprocessor for programming the motor energization movement rate, time intervals of movement, fluid volume increments to be dispensed and other parameters, for correspondingly controlling the fluid dispensed from the syringe barrel.
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Accused Products
Abstract
A fluid dispenser wherein a fixed threaded shaft carries a moveable microprocessor-controlled electric drive motor integrally provided with a shaft extension carrying a plunger for directly contacting and compressing fluid in a syringe barrel to dispense the fluid in accordance with programmed shot volume increments (as small as 0.001 cc, for example) set in the microprocessor, and provided further with provision for the automatic refilling of the syringe barrel upon completion of the fluid dispensing by the plunger
66 Citations
14 Claims
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1. A fluid-dispensing system having, in combination, a fixed longitudinal screw shaft carrying in threaded engagement therewith, an electric motor assembly rotatably longitudinally incrementally movable therealong, the motor assembly integrally carrying a depending longitudinal tubular extension terminally provided with a plunger dimensioned to enter and slide within a fluid-containing syringe barrel into direct contact with the fluid therein as the motor assembly is moved along the fixed screw shaft;
- and a microprocessor for programming the motor energization movement rate, time intervals of movement, fluid volume increments to be dispensed and other parameters, for correspondingly controlling the fluid dispensed from the syringe barrel.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of fluid dispensing under the control of a longitudinal screw shaft carrying an electric motor integrally provided with a depending longitudinal extension terminating in a plunger, the method comprising, fixing the screw shaft against movement;
- energizing the motor under programmed microprocessor control to cause the motor rotatingly to move longitudinally along the screw shaft in programmed increments;
positioning a longitudinal fluid-filled syringe barrel below the plunger to receive the same within the barrel for directly compressing the fluid to dispense the same from the syringe barrel in accordance with said programmed increments to dispense corresponding programmed fluid volumes from the syringe barrel. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- energizing the motor under programmed microprocessor control to cause the motor rotatingly to move longitudinally along the screw shaft in programmed increments;
Specification