Patent ID: 8491536

Claim:
A dose setting mechanism for a medicament delivery device comprising, a housing having a longitudinal axis; a locking member rotational and slidably fixed to the housing and releasably engaged with a lead screw; a pinion connected to the locking member and having an axis of rotation offset and parallel to the longitudinal axis; a primary dose member having a gear segment configured to engage the pinion; a secondary dose member having teeth engaged with the pinion; the lead screw configured to slidably engage the primary dose member when the locking member is disengaged; a plunger rod rotationally fixed to the lead screw; a nut threadedly connected to the plunger rod and slidably locked to the lead screw; and a dose knob in clutched engagement with a clutch plate that is rotatably fixed to the primary dose member and to lead screw when the locking member is disengaged.