Safety syringe cap minimizing needle-stick probability

Details Safety syringe cap minimizing needle-stick probability Safety syringe cap minimizing needle-stick probability

1990-02-23

1991-03-12

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

049989227

ABSTRACT:
This invention is a lockable and retractable safety cap for covering the needle of a hypodermic syringe to prevent accidental needle-stick. There is a unitary cap assembly of a resiliently flexible plastic material including a hub portion disposed concentrically about a base portion of the needle and attached to the barrel, a sliding safety hub portion having a bore therethrough slidably disposed with the needle passing through the bore and extending over a point end of the needle, and a plurality of slats extending between the hub portion and the sliding safety hub portion. The slats are parallel to the needle whereby a longitudinal compressive force against the sliding safety hub portion is resisted by a longitudinal compressive resistance of the slats which must be overcome before the slats will deform and flex outward from the needle to expose the needle for use. A releasable safety latch assembly can be disposed over the slats for preventing deforming and outward flexing thereof. The preferred assembly comprises a coil spring disposed over the slats, a sliding collar carried by an outer end of the coil spring, a retaining button located on one of the slats adjacent the inner end for holding the sliding collar to retain the coil spring in a compressed state, and a release for releasing a hold on the sliding collar when the slats bends outward whereby following use of the syringe the coil spring is released and returns to an extended state.

REFERENCES:
patent: 3134380 (1964-05-01), Armao
patent: 4139009 (1979-02-01), Alvarez
patent: 4790828 (1988-12-01), Dombrowski et al.
patent: 4867172 (1989-09-01), Haber et al.

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