Protective needle assembly for hypodermic syringe

Details Protective needle assembly for hypodermic syringe Protective needle assembly for hypodermic syringe

1991-06-06

1992-04-14

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604263, A61M 532

Patent

active

051043858

ABSTRACT:
A protective needle assembly adapted to be mounted upon the discharge extremity of the barrel of a conventional hypodermic syringe has a cylindrical hub that holds an axially aligned cannula needle. A transparent cylindrical sheath slidingly engages the hub. The sheath has a longitudinal slot and communicating detent, and a locking aperture. A tab radially emergent from the hub can be caused to engage the detent, slot or locking aperture, achieving respectively, a storage state where the sheath extends forwardly of the tip of the needle, a use state where the tip of the needle extends forwardly of the sheath, and an irreversibly locked disposal state wherein the sheath is forward of the tip of the needle.

REFERENCES:
patent: 4737144 (1988-04-01), Choksi
patent: 4911693 (1990-03-01), Paris
patent: 4923447 (1990-05-01), Morgan
patent: 4935016 (1990-06-01), Deleo
patent: 4994045 (1991-02-01), Ranford

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