Syringe with needle-hangaring mechanism

Details Syringe with needle-hangaring mechanism Syringe with needle-hangaring mechanism

1993-08-24

1994-08-30

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 500

Patent

active

053423100

ABSTRACT:
A syringe comprises, besides a barrel, a plunger and a needle, a needle holding stopper, a needle hole stopper, a spring connecting the needle holding stopper and needle hole stopper and a lock mechanism provided between the barrel and the needle holding stopper. The lock mechanism functions such that it fixes the needle holding stopper until completion of injection so that the needle is not pushed up into the hinder part of the barrel, and that it is released when the plunger is further pressed, i.e. by a single finger motion, after completion of the injection, so that the needle holding stopper is pushed up by force of the spring, thereby hangaring the needle in the barrel and, at the same time, the needle hole stopper is moved to close the needle hold on the end of the barrel. The syringe causes no accidental pricking of a finger with the needle after injection operation or oozing out of the blood or the like of the patient adhered on the needle tip.

REFERENCES:
patent: 4795432 (1989-01-01), Karczmer
patent: 5059180 (1991-10-01), McLees
patent: 5147303 (1992-09-01), Martin
patent: 5195983 (1993-03-01), Boese

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