Throw-away syringe

Details Throw-away syringe Throw-away syringe

1993-04-15

1994-08-02

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

053341562

ABSTRACT:
Throw-away syringe, of the type constituted by a cylindrical tubular body in which a stopper can be displaced in the direction of its axis being the latter controlled by a manually actuated stem and in the above syringe, between the stopper associated to the stem and the discharge end of the tubular body, is fitted freely a second stopper carrying a blade placed in an adequate setting of said stopper, a blade inoperative during the backward movement of the stopper and operative to make a mark or incision in the advance direction, a mark through which the inner pressure of the cylindrical body is equalled to the atmospheric pressure to prevent sucking out and therefore re-using the syringe after its first use.

REFERENCES:
patent: 3951146 (1976-04-01), Arias
patent: 5034002 (1991-07-01), Duranzampa et al.
patent: 5257976 (1993-11-01), Fenet

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