Safety syringe system

Details Safety syringe system Safety syringe system

1991-12-02

1993-06-01

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604110, 604192, 128919, A61M 532

Patent

active

052155340

ABSTRACT:
A system for preventing needle stick or re-use of unsterile hypodermic needles or the like. The hypodermic syringe includes a spring biased, locking push button apparatus exterior to the plunger, which communicates with a locking safety sheath situated at the base of the hypodermic needle prior to activation. The safety sheath is in sliding, longitudinal communication about the needle and is activated to its sheathing position by urging a push button on the locking push button structure in the direction of the needle, directing the sheath from about the base of the needle to over the tip of the needle. Upon communication with the tip, the safety sheath deploys a locking hatch, preventing the urging of the sheath back to the base, and rendering the needle un-reusable. The locking apparatus of the invention operates independently of the syringe plunger, allowing the drawing and injection of fluids without interference, and is sheathed in its locking position only upon the independent urging of the push button, "clicking" the sheath into a locked position.

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