Abbvie Inc.

Patrick A Harrell

Jeremy Hemingway

Christoph L Gillum

David Andrew Parrott

Ji Zhou

Rajkumar V Conjeevaram

Sean E Mackey

Martin J Gibler

Mark A Bennett

Kenneth E Hogue

Thomas Rebne

Kenneth R Waeber

Bradley A Clark

Raj Conjeevaram

Bradley Clark

A syringe containing a high water content product and for use in a drug infusion system is provided. The syringe includes a plunger carrying front and rear o-rings made of a diene rubber compound such as chlorobutyl rubber or bromobutyl rubber to impart very low gas permeability characteristics to the o-rings. The plunger may be molded as a single part or in two parts. If molded as one part with radially-engaging mold portions, the seal glands in the plunger may include parting lines from the mold. If molded as two parts with axially-engaging mold portions, the front seal gland may include a sealing surface and under cut that has no parting line. The o-rings may be surface treated with a lubricant to improve sealing where the molding process gives rise to parting lines in the seal glands.

Sealing arrangement for syringe

Growing community of inventors

Loveland, OH, United States of America

Patrick A Harrell