Non-reusable hypodermic syringe

Details Non-reusable hypodermic syringe Non-reusable hypodermic syringe

1991-11-14

1993-12-14

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, A61M 500

Patent

active

052697606

ABSTRACT:
A non-reusable syringe comprised generally of a syringe needle, a syringe cylinder and a push rod/piston assembly. The medication is loaded into the syringe by withdrawing the push rod/piston assembly from the syringe cylinder until one of the pawl reversing notches engages a reversible pawl, at which point the direction of the rod/piston assembly changes and cannot be redirected, whereupon the user is committed. Air then is evacuated from the syringe prior to the injection, which starts the forward injection sequence. Also at this point the retaining ring holding the auto release piston is left behind near the top of the syringe. The injection proceeds to completion normally, with the top of the locking dust cap flush with the top of the syringe. After the injection is completed, the syringe is locked in the farthest down position.

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