Thomas Nagel,Rene Richter,Robert Witt,Richard Guenther,Martin Graefe
申请号：
US14405989
公开号：
US09737658B2
申请日:
2013.06.25
申请国别(地区):
US
年份:
2017
代理人:
摘要：
The invention relates to a stopper arrangement for a drug delivery device, comprising a stopper, a linear actor coupled with one end to the stopper and with an opposite end to a coupling arrangement, wherein the stopper arrangement is configured to be disposed within a container of a drug delivery device, wherein a shape and/or material of the stopper and the coupling arrangement are configured such that a first frictional force between the coupling arrangement and the container is lower than a frictional force between the stopper and the container when the linear actor is contracting and that second frictional force between the coupling arrangement and the container is greater than the frictional force between the stopper and the container when the linear actor is expanding.
