| abstract |
A drug delivery device comprising: a drug container comprising at least one bellow, wherein in the at least one bellow comprises a first surface and an opposing second surface, wherein the first surface is comprised of a first Belleville spring and the opposing second surface is comprised of a second Belleville spring, wherein the second Belleville spring has a higher spring rate than the first Belleville spring, wherein the drug container is positioned adjacent to a duct and within a body, wherein a duct cover, having a nozzle and a nozzle hole, is movably attached to the body, and wherein the drug container contains a drug. |