Automated means for withdrawing a syringe plunger

Details Automated means for withdrawing a syringe plunger Automated means for withdrawing a syringe plunger

2005-04-12

2005-04-12

Maust, Timothy L. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

Filling or refilling of dispensers

By operation of means causing or controlling dispensing

C141S025000, C141S095000, C141S198000, C141S330000, C604S416000

Reexamination Certificate

active

06877530

ABSTRACT:
In one exemplary embodiment, an automated means for withdrawing a syringe plunger a method for just-in-time extension of the plunger to permit filling the syringe with a prescribed dose of medication are provided. The method includes the steps of: (1) inputting a desired volume of the prescribed dose of medication; (2) inputting syringe identifying information; (3) calculating a distance that the plunger is to be extended based on the inputted desired volume and syringe identifying information; (4) calculating drive parameters for a controllable drive that causes extension of the plunger when actuated and ensures that the plunger is extended the desired distance; and (5) controlling the drive in view of the calculated drive parameters to cause the plunger to be extended the desired distance.

REFERENCES:
patent: 5805454 (1998-09-01), Valerino, Sr. et al.
patent: 5900557 (1999-05-01), Tanihata et al.
patent: 6048086 (2000-04-01), Valerino, Sr.
patent: 6615881 (2003-09-01), Bartholomew et al.
patent: 20010018937 (2001-09-01), Nemoto
patent: 20020020459 (2002-02-01), Baldwin et al.

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