Single use hypodermic syringe

Details Single use hypodermic syringe Single use hypodermic syringe

1991-03-22

1992-06-09

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604220, A61M 500

Patent

active

051203146

ABSTRACT:
A single use hypodermic syringe uses a generally cylindrical elongated syringe body defining a center bore and supporting a hollow needle in communication with the center bore through the inlet/output channel. A movable piston formed of an elastic material is sealingly supported within the syringe bore. A piston driver member extends into the syringe bore and is coupled to the piston. An annulus ring is fixed within the center bore near the inlet/outlet channel. The annulus permits the piston to pass over it when delivering an injection but locks onto the piston at the completion of the injection, precluding any further use of the syringe.

REFERENCES:
patent: 4713056 (1987-12-01), Butterfield
patent: 4986812 (1991-01-01), Perler
patent: 5000737 (1991-03-01), Free et al.
patent: 5021047 (1991-06-01), Movern

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