Medical needle unit

Details Medical needle unit Medical needle unit

1993-01-27

1995-06-20

Weiss, John G.

Surgery

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

Treating material introduced into or removed from body...

604192, A61M 532

Patent

active

054257204

ABSTRACT:
A medical needle unit has a front end with a tip and a rear end and insertable with a tip in as well as withdrawal from the body of a patient, a protective element for preventing accidental puncture by the tip of the needle after the withdrawal of the needle from the body, the protective element including a hood movable between an exposing position in which the tip of the needle is exposed and an enclosed position in which the tip of the needle is enclosed, a spring connecting with the hood so that when the spring is compressed the hood is in the exposed position and when the spring is relaxed the hood is in the enclosed position, and a retaining element which retain the spring in the compressed position and therefore the hood in the exposing position before an injection by the needle and is releasable during the injection so as to relax the spring and to move the hood to the enclosing position.

REFERENCES:
patent: 4139009 (1979-02-01), Alvarez
patent: 4804371 (1989-02-01), Vaillancourt
patent: 4892521 (1990-01-01), Laico et al.
patent: 4911706 (1990-03-01), Levitt
patent: 4955866 (1990-09-01), Corey
patent: 5059180 (1991-10-01), McLees
patent: 5120321 (1992-06-01), Oksman et al.
patent: 5183468 (1993-02-01), McLees

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