Patent ID: 7416540

Claim:
An apparatus, comprising: a housing having an inner surface; a medicament container disposed within the housing, the medicament container configured to contain a medicament; and an actuator configured to be disposed within the housing and to move the medicament container within the housing, the actuator including: an energy storage member having a surface, a portion of the surface being in contact with a portion of the inner surface of the housing, the energy storage member having a first position and a second position, in the first position the energy storage member has a first potential energy, in the second position the energy storage member has a second potential energy less than the first potential energy, the energy storage member configured to convert a portion of the first potential energy into a kinetic energy when moving between the first position and the second position to move the medicament container within the housing, the portion of the surface of the energy storage member configured to move relative to the portion of the inner surface of the housing when the energy storage member moves between the first position and the second position, the energy storage member having a longitudinal axis offset from a longitudinal axis of the medicament container; and a release member configured to selectively deploy the energy storage member from the first position to the second position.