Non-reusable syringe

Details Non-reusable syringe Non-reusable syringe

1991-04-02

1992-07-07

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, A61M 500

Patent

active

051279061

ABSTRACT:
A single use syringe in the form of a cylindrical barrel with a port end attached to a hypodermic needle. A plunger and piston in the barrel transfer liquid into or from the syringe through a port end. The plunger includes a locking structure formed at a predetermined position. An insert at a remote end of the barrel includes at least one cantilevered, longitudinally extending resilient arm with a radially acting, inwardly extending follower at a free end thereof that rides over the plunger. When the plunger moves to a locking position, the follower engages the plunger locking structure to block any further longitudinal motion of the plunger and piston preventing any subsequent use of the syringe.

REFERENCES:
patent: 4687467 (1987-08-01), Cygielski
patent: 4699614 (1987-10-01), Glazier
patent: 4713056 (1987-12-01), Butterfield
patent: 4731068 (1988-03-01), Hesse
patent: 4878899 (1989-11-01), Plouff
patent: 4915692 (1990-04-01), Verlier
patent: 5021047 (1991-06-01), Movern

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