An apparatus includes a housing, a medicament container, an actuator, and a biasing member. The actuator is configured to move the medicament container within the housing when the actuator is moved from a first configuration to a second configuration. The actuator includes a gas container and a puncturer....http://www.google.com/patents/US7731690?utm_source=gb-gplus-sharePatent US7731690 - Devices, systems and methods for medicament delivery
