Disposable safety syringe

Details Disposable safety syringe Disposable safety syringe

2005-01-25

2005-01-25

Kennedy, Sharon (Department: 3762)

Surgery

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

Treating material introduced into or removed from body...

C604S236000

Reexamination Certificate

active

06846301

ABSTRACT:
A safety syringe10includes a generally tubular body14having a needle end18and plunger end22, needle38and retractable needle seat30, two-way valve36, plunger42, stopper62, piston52, and rear plunger seal44. During use, the plunger may be moved to create a vacuum in the plunger. The user then moves the plunger toward the needle end, pressurizing a vial, then pulls backward to a selected position corresponding to the desired volume of fluid to be withdrawn. At the conclusion of the injection stroke, the piston is disengaged from the plunger. The vacuum within the plunger retracts the needle safely into the tubular body.

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patent: 6193695 (2001-02-01), Rippstein, Jr.
patent: 6458105 (2002-10-01), Rippstein et al.
patent: 20030212371 (2003-11-01), Smith et al.

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