Patent ID: 9539396
Date: 2017-01-10
CPC Classifications: A61M,F16H,Y10T

Claim:
1. A medication delivery device, comprising: a housing having a proximal end and a distal end, a rotation member which is adapted to be rotated in a first direction with respect to the housing during setting of a dose of a medication and to be rotated in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction, a piston rod which is adapted to be displaced in a distal direction with respect to the housing for delivering the dose, a drive member which follows rotational movement of the rotation member in the second direction during delivery of the dose, and a stop member which prevents rotational movement of the drive member with respect to the housing in the first direction during setting of the dose, wherein: the rotation member comprises a plurality of teeth; the drive member comprises a plurality of teeth that releasably engage with the plurality of teeth of the rotation member; the rotational movement of the drive member in the second direction is converted into movement of the piston rod in the distal direction with respect to the housing; and the drive member abuts the rotation member during movement of the rotation member for setting and delivery of the dose.