An implantable delivery device for delivering a fluid in a controlled manner, including a body having a chamber, a tube having an inlet and an outlet, at least a portion of the tube passing through the chamber, a drive pinion operatively connected to a motor for rotation, a wheel engaging with the drive pinion, and a ring operatively attached to the wheel, wherein the ring presses against the tube in a pressing zone and is driven by a rotation of the wheel relative to the body such that the pressing zone moves along the tube resulting from the rotation of the wheel to generate a movement of fluid present in the tube from the inlet to the outlet.