Single-use pneumatic safety syringe providing gas-driven...

Details Single-use pneumatic safety syringe providing gas-driven... Single-use pneumatic safety syringe providing gas-driven...

2005-09-02

2010-10-12

Sirmons, Kevin C (Department: 3767)

Surgery

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

Treating material introduced into or removed from body...

C604S110000, C604S195000

Reexamination Certificate

active

07811259

ABSTRACT:
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.

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