Battery operated miniature syringe infusion pump and improved ha

Details Battery operated miniature syringe infusion pump and improved ha Battery operated miniature syringe infusion pump and improved ha

1987-08-24

1989-02-14

Truluck, Dalton L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

128DIG1, A61M 520

Patent

active

048043680

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.

REFERENCES:
patent: 2702547 (1955-02-01), Glass
patent: 4544369 (1985-10-01), Skakoon et al.

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