Andreas Geipel,Joerg Dogwiler,Ulrich Haueter,Simon Scheurer,Rudolf Zihlmann,David Teutsch,Florian Kuehni,Reto Schaltegger
申请号：
US14049528
公开号：
US20140039396A1
申请日:
2013.10.09
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A dosing unit for an ambulatory infusion pump device is presented. The dosing unit comprises a cylinder pump with a cylinder and a piston arranged in the cylinder. The piston has a shaft with a first threaded segment interacting with a threaded portion of the cylinder and can be displaced along a longitudinal axis of the cylinder by rotating the piston in regard to the cylinder around the axis. Furthermore, the piston allows for the relative or absolute determination of the longitudinal and/or rotational displacement of the piston in regard to the cylinder. In one embodiment, the piston shaft comprises a second segment provided with optically detectable markings that allow the monitoring of the longitudinal and/or rotational displacement of the piston in regard to the cylinder.
