Safety syringe with needle retracting mechanism

Details Safety syringe with needle retracting mechanism Safety syringe with needle retracting mechanism

2004-01-02

2008-08-12

Lucchesi, Nicholas D. (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

C604S195000

Reexamination Certificate

active

07410478

ABSTRACT:
A safety syringe includes a flexible holder-supporting seat that is sleeved around and that clamps a needle holder within a front end portion of a syringe barrel. A flexible sealing member seals an open front end of a plunger so as to define a vacuuming chamber in the plunger. When the plunger moves within the barrel to a front limit position, a holder-retaining front portion of the sealing member engages and retains the needle holder thereon. The plunger pushes the holder-supporting seat to separate from the needle holder such that the sealing member and the needle holder mover rearward within the syringe barrel due to negative pressure produced in the plunger, thereby retracting a needle into the syringe barrel.

REFERENCES:
patent: 4828548 (1989-05-01), Walter
patent: 5114410 (1992-05-01), Caralt Batlle
patent: 5997512 (1999-12-01), Shaw
patent: 7074207 (2006-07-01), Yang
patent: WO 95/31236 (1995-11-01), None

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