Disposable infusion device with medicament level indicator

1 . A wearable infusion device comprising:

a base that contacts a patient's skin;

a reservoir arranged to contain a liquid medicament to be delivered to beneath a patient's skin;

a pump that causes the medicament to flow from the reservoir; and

a level indicator that provides an indication of medicament level.

2 . The device of claim 1 , wherein the indication of medicament level is indicative of the volume of medicament remaining in the reservoir.

3 . The device of claim 1 , wherein the level indicator includes a display.

4 . The device of claim 3 , wherein the display is an analog display.

5 . The device of claim 4 , wherein the analog display includes a mechanical indicator.

6 . The device of claim 5 , wherein the mechanical indicator comprises a display needle.

7 . The device of claim 1 , wherein the reservoir is formed of flexible material, wherein the reservoir changes shape responsive to the volume of medicament therein, and wherein the level indicator is responsive to the change in shape of the reservoir to indicate the medicament level.

8 . The device of claim 7 , further comprising a follower that follows the changes in shape of the reservoir and a linkage the couples the follower to the level indicator.

9 . The device of claim 8 , wherein the level indicator includes a mechanical indicator and wherein the linkage couples the follower to the mechanical indicator.

10 . The device of claim 1 , further comprising a housing covering the base and enclosing the reservoir and the pump, and wherein the housing includes a window through which the level indicator is viewable.

11 . The device of claim 10 , wherein the level indicator includes a display needle.