No-stick syringe

Details No-stick syringe No-stick syringe

1992-10-29

1993-12-07

Hirsch, Paul J.

Surgery

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

Treating material introduced into or removed from body...

604263, A61M 532

Patent

active

052679772

ABSTRACT:
A syringe assembly for reducing the risk of an accidental needle prick. The syringe assembly includes a barrel, a needle lock and hub assembly, and a sheath. The sheath slidably engages the needle lock and hub assembly to selectively conceal or expose the needle. The needle lock and hub assembly is provided with alignment rail buttons which matingly engage alignment rails longitudinally disposed interiorly of the sheath, permitting a limited axial travel of the sheath. A locking chamber and an restrictive passage communicate with the alignment rails which are engagable with a respective adjustment rail button guide to enable the sheath to be locked in a protective posture. The engagement and disengagement of the alignment rail buttons and the locking chambers each produce an audible indication as to whether the sheath is locked to conceal the needle or unlocked to expose the needle. Further, the sheath is transparent so as to provide a visual indication that the alignment rail buttons are engaged with the locking chambers. The transparent sheath also enables the user to observe the orientation of the needle through the sheath.

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