Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-03-01
1993-12-28
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
052735397
ABSTRACT:
A safety syringe includes a hollow needle for intravenous injection use eccentrically mounted in a syringe with said needle preliminarily held in a rigid blocking bulb generally conical shaped or truncated-cone shaped having an elongate stem portion protruding rearwardly from the bulb embedded in a rear bulb socket perpendicularly formed in a flexible plug inserted in a front porton of the syringe having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having an annular groove annularly recessed in the plunger to be engageable with the needle head portion to drive and move the rigid blocking bulb frontwardly from the rear bulb socket into a front bulb socket which is normally inclinedly formed in the flexible plug and will be operatively biased perpendicularly in the plug when almost exhausting the liquid in the syringe when finishing the injection, whereby upon a retraction of the plunger and the needle coupled to the plunger rearwardly into the syringe, the elongate stem portion of the rigid bulb will be greatly obliquely biased in a larger angle by the front bulb socket of the plug to be much inclinedly positioned for efficiently blocking an outward protruding of the needle retracted in the syringe for really preventing an injury or infectious contamination to the surroundings as caused by the needle.
REFERENCES:
patent: 4804370 (1989-02-01), Haber et al.
patent: 5104378 (1992-04-01), Haber et al.
patent: 5171300 (1992-12-01), Blake, III et al.
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