Battery operated miniature syringe infusion pump and improved halfnut therefor
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United States of America Patent
Stats
-
Feb 14, 1989
Issued Date -
N/A
app pub date -
Aug 24, 1987
filing date -
Dec 5, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Drive means for a small, lightweight, easily operated syringe infusion pump. A syringe is secured in a holder and the syringe plunger is moved by a pusher block of the drive means. The pusher block is advanced to the syringe plunger by squeezing a finger tab. This simultaneously decouples the pusher block from the internal drive and opens the antisiphon catch to allow quick and easy set-up. The pusher block is moved by the engagement of a floating halfnut on a threaded leadscrew. A force is applied to the halfnut by the block substantially near the midpoint of the leadscrew thereby greatly reducing force mechanisms that attempt to separate the leadscrew and halfnut. A relatively light first biasing means is on the block for applying a relatively small force between the halfnut and the leadscrew.
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Family
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Cited Art Landscape
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