MARTIN J. GIBLER,MARK A. BENNETT,KENNETH R. WAEBER,KENNETH E. HOGUE,CHRISTOPH L. GILLUM,PATRICK A. HARRELL,DAVID A. PARROTT,SEAN E. MACKEY,RAJKUMAR V. CONJEEVARAM,THOMAS REBNE,BRADLEY A. CLARK,JEREMY
申请号：
US16267318
公开号：
US20190240416A1
申请日:
2019.02.04
申请国别(地区):
US
年份:
2019
代理人:
摘要：
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 orings may be surface treated with a lubricant to improve sealing where the molding process gives rise to parting lines in the seal glands.
