CPC A61M 5/31513 (2013.01) [A61M 2005/3152 (2013.01)] | 9 Claims |
1. A gas-driven drug delivery device comprising:
a drug container having a drug outlet and configured to contain a drug;
a plunger slidably coupled with the drug container;
a gas chamber configured to contain a pressurized gas; and
a piston assembly including:
a flexible pushrod workingly coupled with the plunger,
a non-linear guide including a non-linear guide pathway at least partially surrounding the flexible pushrod,
a cylinder having a gas inlet and a bore at least partially surrounding the flexible pushrod, the gas inlet configured to be at least selectively in fluid communication with the gas chamber, and
a piston in operable communication with the flexible pushrod and movable within the bore of the cylinder in response to the pressurized gas entering the cylinder through the gas inlet.
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