Safety syringe with externally connectable and internally retrac

Details Safety syringe with externally connectable and internally retrac Safety syringe with externally connectable and internally retrac

1994-10-21

1995-07-11

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

054316316

ABSTRACT:
A safety syringe includes: a hollow needle assembly having a hollow needle portion detachably coupled to a shank portion embedded in a sleeve portion of a syringe and having a needle head portion formed on a rear portion of the shank portion, and a plunger slidably held in the syringe and having a biasing socket recessed in the plunger for engaging the needle head portion of the needle assembly for a coupling of the needle assembly with the plunger for a retraction into the syringe for obliquely biasing the needle portion for preventing re-protrusion of the needle outwardly, thereby allowing a variety of needles of different sizes to be replaceably mounted on the shank portion outside the syringe for a convenient mounting of the needle on the syringe.

REFERENCES:
patent: 5104378 (1992-04-01), Haber et al.
patent: 5232458 (1993-08-01), Chen
patent: 5242402 (1993-09-01), Chen
patent: 5328475 (1994-07-01), Chen

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