Patent ID: 9724478
Date: 2017-08-08
CPC Classifications: A61M

Claim:
1. An injection device for delivering a predetermined fixed dose of liquid drug, the injection device comprising: a base member, a piston rod defining a longitudinal axis and being adapted to cooperate with a piston in causing the predetermined fixed dose to be delivered from the device, a first tubular member operatively coupled with the base member and movable to set the predetermined fixed dose, a second tubular member operatively coupled with the first tubular member and the piston rod, wherein during each setting of the predetermined fixed dose the first tubular member is rotated with respect to the base member from a zero dose position to a predefined dose setting stop and during injection the first tubular member is allowed to advance non-rotationally along the longitudinal axis while the second tubular member is allowed to rotate with respect to the base member; and wherein the predetermined fixed dose is not variable and settable by the user.