Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-11-04
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
054316324
ABSTRACT:
A safety syringe for intravenous injection, includes: a hollow needle assembly having a hollow needle portion detachably coupled to a shank portion embedded in a sleeve portion eccentrically formed on a syringe and having a needle head portion formed on a rear portion of the shank portion, and a plunger straightly slidably held in the syringe without being rotatable and having a biasing socket eccentrically 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 together 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: 4804370 (1989-02-01), Haber et al.
patent: 5104378 (1992-04-01), Haber et al.
patent: 5242402 (1993-09-01), Chen
patent: 5328475 (1994-07-01), Chen
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