Syringe plunger jacket with expandable seal

Details Syringe plunger jacket with expandable seal Syringe plunger jacket with expandable seal

2007-06-08

2010-10-26

Lucchesi, Nicholas D (Department: 3763)

Surgery

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

Treating material introduced into or removed from body...

C604S187000, C604S151000, C604S152000, C604S153000, C604S154000, C604S155000, C604S212000, C604S213000, C604S214000, C604S215000, C604S216000, C604S217000, C604S128000, C600S432000

Reexamination Certificate

active

07819845

ABSTRACT:
A syringe plunger/jacket assembly may comprise a flexible jacket attached to a rigid plunger. The jacket may comprise at least two sealing rings (front and rear) that prevent fluid from leaking out of the rear of the barrel during injection of fluid from the syringe. The rear sealing ring may or may not contact or seal the interior surface of the syringe barrel in an unloaded state. In the loaded state, when force is applied in the direction of the forward discharge end of the syringe, pressure is created on the jacket. This condition causes the rear seal to expand and contact and/or seal the interior surface of the syringe barrel.

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Office Action from U.S. Appl. No. 11/279,644—Aug. 12, 2008—13 pages.
Office Action from U.S. Appl. No. 11/279,644—May 4, 2009—21 pages.

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