Single-use syringe

Details Single-use syringe Single-use syringe

1993-09-10

1994-09-06

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604198, 604218, A61M 500

Patent

active

053444051

ABSTRACT:
A single-use syringe having a needle which retracts upon a full depression of its plunger and thus, renders the syringe non-reusable. The plunger selectively engages the barrel of the syringe so as to limit the withdraw of the plunger relative to the barrel. The barrel has formations extending therefrom which selectively and matingly engage formations extending from the plunger so as to selectively limit the travel of the plunger relative to the needle and retract the needle into a concealed position. The nose of the barrel carries a split ring which is contractible to permit a rearward displacement of the barrel and the needle attached thereto relative to the stationary housing upon a full depression of the plunger. The travel of the barrel relative to the stationary body is terminated by dogs located proximate the forward end of the nose which are engageable with the notches in the stationary housing upon the rearward displacement of the barrel relative to the stationary housing. A cap may be provided for sheathing the needle prior to use.

REFERENCES:
patent: 2571653 (1951-10-01), Bastien
patent: 3306290 (1967-02-01), Weltman
patent: 3672368 (1972-06-01), Schwarz
patent: 3890971 (1975-06-01), Leeson et al.
patent: 4631057 (1986-12-01), Mitchell
patent: 4804372 (1989-02-01), Laico et al.
patent: 5049133 (1991-09-01), Villen Pascual
patent: 5061251 (1991-10-01), Juhasz
patent: 5084029 (1992-01-01), Nacci nee Tagliafferi et al.
patent: 5135510 (1992-08-01), Maszkiewicz et al.
patent: 5201708 (1993-04-01), Martin
patent: 5201720 (1993-04-01), Borgia et al.

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