Assembly with collapsible sheath and tip guard

Details Assembly with collapsible sheath and tip guard Assembly with collapsible sheath and tip guard

1995-04-11

1996-01-30

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604198, 604263, A61M 500

Patent

active

054877334

ABSTRACT:
A needle cannula is surrounded by a collapsible sheath and a spring that is expandable and retractable independent of the sheath. A tip guard is mounted to either the distal end of the sheath or the distal end of the spring. The tip guard is movable to protectively cover the tip of the needle cannula as the spring expands independently of the sheath. Proximally directed forces on the tip guard will merely urge the tip guard into tighter protective engagement with the distal tip of the needle cannula without exposing the needle cannula. However, the needle cannula can intentionally be re-exposed by merely collapsing the spring in a proximal direction.

REFERENCES:
patent: 4139009 (1979-02-01), Alvarez
patent: 4998922 (1991-03-01), Kuracina et al.
patent: 5304151 (1994-04-01), Kuracina
patent: 5328482 (1994-07-01), Sircom et al.
patent: 5334149 (1994-08-01), Nortman et al.

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