Patent ID: 7648482

Claim:
An apparatus, comprising: a housing; a medicament injector disposed within the housing, the medicament injector configured to inject a medicament contained therein into a body, the medicament injector including a needle, the needle defining a longitudinal axis; and an actuator configured to be disposed within the housing and to move the medicament injector between a first medicament injector position and a second medicament injector position, in the first medicament injector position a second end of the needle is within the housing, in the second medicament injector position the second end of the needle is outside the housing, the actuator including: an 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 moved in a first direction from the first position to the second position, wherein the kinetic energy directly moves the medicament injector in a second direction between the first medicament injector position and the second medicament injector position, the second direction opposite the first direction the energy storage member having a longitudinal axis offset from the longitudinal axis of the needle; and a release member configured to selectively deploy the energy storage member from the first position to the second position.