Retractable and destructible safety syringe

Details Retractable and destructible safety syringe Retractable and destructible safety syringe

1997-12-26

1999-08-03

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, 604220, A61M 500

Patent

active

059318139

ABSTRACT:
A retractable and destructible safety syringe including a syringe barrel, a plunger, a needle holder, a needle, capture elements formed on the needle holder or the plunger and a one-way movable detent formed on the plunger or the needle holder. When a piston of the plunger is fully depressed within the syringe barrel, the detent can be easily firmly engaged with the capture elements, whereby the needle holder and the needle can be together pulled back into the barrel. In addition, when the fully retracted plunger is depressed again, the tip of the needle is pressed against a shoulder section of the barrel, being bent and destroyed thereby. Sealing fixing rings are formed on outer wall of the needle holder and inner wall of the needle holder cavity, serving to sealably and separably engage the needle holder with the needle holder cavity. A latch plate is disposed between the barrel and the plunger to prevent the plunger from being pushed to latch the capture elements to the detent by mistake.

REFERENCES:
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patent: 4950241 (1990-08-01), Ranford
patent: 5205824 (1993-04-01), Mazur
patent: 5242402 (1993-09-01), Chen
patent: 5364359 (1994-11-01), Van den Haak
patent: 5370619 (1994-12-01), Rossi
patent: 5378240 (1995-01-01), Curie et al.
patent: 5395346 (1995-03-01), Maggioni
patent: 5415638 (1995-05-01), Novacek et al.
patent: 5533975 (1996-07-01), Lu

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