Patent ID: 8652100
Filing Date: 2014-02-18
Classification: A61M

Abstract:
1. An injector device comprising: (a) a first housing assembly configured to hold a syringe; (b) a second housing assembly including an outer housing and an inner housing, the inner housing being configured to be axially fixed relative to the first housing assembly, the outer housing being configured to move axially relative to the first housing assembly between an extended position and a retracted position, the second housing assembly including an injection assembly configured to operate the syringe to inject medicament from the syringe, the second housing assembly including a trigger member configured to fire the injection assembly only when the outer housing is in the retracted position, and the second housing assembly including a biasing member that biases the outer housing into the extended position; (c) a locking member that fixedly holds the outer housing in the extended position; and (d) an interlock assembly configured to rotatably attach the first housing assembly to the second housing assembly in a particular rotational position, the interlock assembly also being configured to release the locking member when the first and second housing assemblies are in the particular rotational position, the outer housing being movable relative to the first housing assembly to the retracted position against the bias of the biasing member when the locking member is released.