Gunnar Monrad Sie,Carsten Lund,Niels Frederik Keiser-Nielsen
申请号：
US12297340
公开号：
US08551045B2
申请日:
2007.04.19
申请国别(地区):
US
年份:
2013
代理人:
摘要：
The present invention relates to methods and devices for providing a reduced risk of free flow from medical devices such as an infusion pump. A medicament containing reservoir is provided with a piston having a sealing portion formed by a material of a first stiffness. The piston further comprises a frictional enhancing member having one or more reservoir wall engaging portions and being at least partly made of a material having a stiffness greater than the first stiffness. By arranging the frictional enhancing member to exert a radially outwards directed force component against the cylindrical wall an increased friction is provided between the piston and the reservoir wall.
