Patent ID: 9089652
Filing Date: 2015-07-28
Classification: A61M,F16H,Y10T

Abstract:
1. A drive mechanism for a medication delivery device, comprising: a housing having a proximal end and a distal end, a rotation member rotating in a first direction with respect to the housing during setting of a dose of a medication and rotating 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 rotating and displaced in a distal direction with respect to the housing for delivering the dose, a drive member following rotational movement of the rotation member in the second direction during delivery of the dose, and a stop member preventing rotational movement of the drive member with respect to the housing in the first direction during setting of the dose, wherein 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.