Plunger of a syringe

Details Plunger of a syringe Plunger of a syringe

2008-05-13

2008-05-13

Mendez, Manuel (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

Reexamination Certificate

active

07371226

ABSTRACT:
A plunger of a syringe characterized by a hook unit formed integrally at the front end of the stopper of thereof. The hook unit comprises a central rod and a push wing extended outwardly from a lateral wall of the central rod. The push wing can be attached to the central rod by a lateral force, which is urged during an insertion process, so that the hook unit will be inserted into a receptacle formed at the rear end of the needle hub in the axial direction. The receptacle has an entrance hole and a cavity lager then the hole, whereby the flexible push wing will be extended again after the unit is in the cavity, forming a locked configuration. As the plunger is pulled back, the needle mount will be pulled into the needle barrel accordingly, achieving a function of self destruction.

REFERENCES:
patent: 5242400 (1993-09-01), Blake et al.
patent: 5575774 (1996-11-01), Chen
patent: 6488656 (2002-12-01), Wu
patent: 6921382 (2005-07-01), Lee et al.

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