Joseph Butler,Matthew Jones,David Aubrey Plumptre,William Marsh,Robert Veasey
申请号：
US14783483
公开号：
US10130772B2
申请日:
2014.04.08
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A handheld injection device includes a housing, a rotatable dose setting member and a power reservoir coupled to the dose setting member. Energy is stored in the power reservoir during rotation of the dose setting member. The injection device also includes a release member for receiving a force from a user and a rotatably arranged drive member engaging with a drive track of a piston rod. The device further includes a release clutch rotationally constrained to the housing and releasably engaging the drive member. The release clutch is positionable in a first axial position when the release member is in a dose setting position and in a second axial position when the release member is in a dose injection position. The axial position of the drive member within the housing remains constant when the release member is in its dose setting position and in its dose injection position.
