Hypodermic syringe with sliding cap

Details Hypodermic syringe with sliding cap Hypodermic syringe with sliding cap

1989-09-29

1990-10-09

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

049617303

ABSTRACT:
A needle and cap assembly for attaching to a hypodermic syringe body includes a needle mounting structure, a needle, and a cap slideably mounted on the needle mounting structure. The needle mounting structure includes a hub, arcuate bands making a sliding fit with an interior surface of the cap, and spokes connecting the bands to the hub. Each band has a profiled tail end including an indent, which cooperates with an axial guide rail on the interior surface of the cap, to allow the cap to be selectively rotated between a first position, in which the cap is retained in an extended position covering the needle, and a second position, in which the cap may be moved in guided axial motion to a retracted position exposing the needle.

REFERENCES:
patent: 4816022 (1989-03-01), Poncy
patent: 4842587 (1989-06-01), Poncy

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