A drug delivery device having a housing containing a gas generator controlled by an electronic controller. The gas generator generates gas into a reciprocable chamber, whereby reciprocation of the chamber causes a lever to reciprocate a pawl, and this action causes a ratchet to The device may also be...http://www.google.fr/patents/US7384413?utm_source=gb-gplus-shareBrevet US7384413 - Drug delivery device
