Threaded nut syringe plunger for use with a medication infusion pump
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United States of America Patent
Stats
-
Sep 21, 1999
Grant Date -
N/A
app pub date -
Mar 2, 1998
filing date -
Mar 2, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved syringe is provided for use in a medication infusion pump for operating the syringe to administer a selected medication to a patient. The syringe comprises a hollow barrel adapted to receive a supply of the selected medication for delivery through infusion tubing or the like to the patient, in combination with a syringe plunger formed with an open-sided threaded half nut for engaging a motor-driven lead screw of the medication infusion pump when the syringe is correctly seated within a syringe compartment formed within a pump housing. The half nut on the syringe plunger includes detent tabs for snap-fit engagement with the pump lead screw to provide a direct drive connection therebetween. A compartment door on the pump housing can be moved to a closed position, following syringe placement into the syringe compartment, only when the plunger half nut is properly engaged with the lead screw.
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