Patent ID: 9555195
Date: 2017-01-31
CPC Classifications: A61M,F16H,Y10T

Claim:
1. A drive assembly for a drug delivery device, the drive assembly comprising: a housing having a proximal end and a distal end, a rotation member being configured a drive component being configured to follow rotational movement of the rotation member in the second direction during delivery of the dose, a stop member being configured to prevent rotational movement of the drive component in the first direction with respect to the housing and to permit rotational movement of the drive component in the second direction with respect to the housing, and a resilient member disposed at a distal end of the drive assembly, wherein the drive component comprises a first drive part and a second drive part, coupled to each other such that relative rotational movement of the first and second drive parts is prevented and relative axial movement is permitted, wherein the first drive part i) is configured to be coupled with the rotation member and ii) comprises a plurality of teeth near the proximal end, the teeth forming a part of a first uni-directional friction clutch mechanism, the first drive part and the rotation member being permanently coupled by the first uni-directional friction clutch mechanism, and the second drive part is configured for engagement with the stop member.