Abstract: A drug delivery device may include a housing defining a longitudinal axis and having an opening and a drug storage container including a delivery member having an insertion end configured to extend at least partially through the opening during a delivery state. The device may also include plunger moveable toward the distal end of the drug storage container to expel a drug from the drug storage container through the delivery member, the plunger including a body portion having an inner wall defining an axial chamber and an outer wall cooperating with the inner wall to define a body thickness. The device may further include a plunger biasing member disposed at least partially within the axial chamber, the plunger biasing member configured to urge the plunger toward the distal end of the drug storage container.

Abstract: A drug delivery device may include a housing defining a longitudinal axis and having an opening and a drug storage container including a delivery member having an insertion end configured to extend at least partially through the opening during a delivery state. The device may also include plunger moveable toward the distal end of the drug storage container to expel a drug from the drug storage container through the delivery member, the plunger including a body portion having an inner wall defining an axial chamber and an outer wall cooperating with the inner wall to define a body thickness. The device may further include a plunger biasing member disposed at least partially within the axial chamber, the plunger biasing member configured to urge the plunger toward the distal end of the drug storage container.

Abstract: A drug delivery device and method of using the same may include a housing having an opening and a drug storage container including a delivery member with an insertion end configured to extend at least partially through the opening. The drug storage container may be coupled with the housing such as to substantially prevent relative movement therebetween. A guard may be positioned adjacent to the opening and operably coupled with the plunger biasing member such that a relative movement between the guard and the housing permits release of a plunger biasing member to urge a plunger in to expel a drug from the drug storage container. A lock component may be configured to resist the relative movement between the guard and the housing until the lock component is released by a user force, whereafter the user force drives the housing and the drug storage container toward an injection site.

Abstract: A drug delivery device may include a housing having an opening and a drug storage container including a delivery member with an insertion end configured to extend at least partially through the opening. A biasing member may initially be retained in an energized state, and may be released to drive a plunger to expel a drug from the drug storage container. The plunger may be configured to selectively rotate from an initial rotational position to a second rotational position under a biasing force exerted by the biasing member, and translate linearly in a distal direction to drive the stopper through the drug storage container after rotating from the initial rotational position to the second rotational position. A releaser member may have an initial position wherein the releaser member retains the biasing member in the energized state, and a second position wherein the releaser member generates an audible end-of-dose signal.

Abstract: A drug delivery device may include a housing defining a longitudinal axis and having an opening and a drug storage container including a delivery member having an insertion end configured to extend at least partially through the opening during a delivery state. The device may also include plunger moveable toward the distal end of the drug storage container to expel a drug from the drug storage container through the delivery member, the plunger including a body portion having an inner wall defining an axial chamber and an outer wall cooperating with the inner wall to define a body thickness. The device may further include a plunger biasing member disposed at least partially within the axial chamber, the plunger biasing member configured to urge the plunger toward the distal end of the drug storage container.