Medical needle unit

Details Medical needle unit Medical needle unit

1994-04-29

1996-08-27

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

055495702

ABSTRACT:
A medical needle unit has a needle having a tip insertable in as well as withdrawable from the body of a patient and a protective element for preventing accidental puncture by the tip of the needle after the withdrawal the tip of the needle from. The body, the protective element includes a hood moveable between an exposing position in which the tip of the needle is exposed and an enclosing position in which the tip of the needle is enclosed, a spring member connecting the hood with the needle so that when the spring member or members is compressed the hood is in the exposed position, and when the spring is relaxed the hood is in the enclosed position, and pivotal retaining element which in one position extends substantially parallel or perpendicular to the needle and retains the spring in the compressed position and therefore the hood in the exposed position before an injection by the needle and after the injection is pivotal to another position so as release the spring so that the spring relaxes and moves the hood to the enclosing position.

REFERENCES:
patent: 4863435 (1989-09-01), Sturnan et al.
patent: 4911706 (1990-03-01), Levitz
patent: 4955866 (1990-09-01), Corey
patent: 5015242 (1991-05-01), Heifetz
patent: 5059180 (1991-10-01), McLees
patent: 5059184 (1991-10-01), Pyke
patent: 5368568 (1994-11-01), Pitts et al.

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