Patent ID: 11872374
Assignee: AMGEN INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A drug delivery device comprising:
a housing having an opening;
a drug storage container including a body portion having a proximal end and a distal end and a delivery member positioned at the distal end of the body portion, the delivery member having an insertion end configured to extend at least partially through the opening during drug delivery;
a plunger moveable in a distal direction with respect to the drug storage container to expel a drug from the drug storage container through the delivery member;
a drive positioned at least partially within the housing and storing energy for moving the plunger in the distal direction;
a guard positioned adjacent to the opening and movable relative to the housing between an extended position and a retracted position, the delivery member, prior to operation of the drug delivery device when the guard is in the extended position, extending through the opening in the housing such that at least a first portion of the delivery member is inside of the housing and at least a second portion of the delivery member including the insertion end of the delivery member is outside of the housing;
a guard biasing member configured to urge the guard in the distal direction, wherein at least a portion of the guard biasing member is distal to the proximal end of the body portion of the drug storage container; and
an arrangement configured to resist relative movement between the guard and the housing until a threshold of resistance is exceeded by a force applied to the guard in a proximal direction, wherein the arrangement includes a first member and a second member coupled with the guard to move jointly with the guard when the guard moves between the extended position and the retracted position, the first member being disposed entirely within the guard and configured to rotate as a result of the force applied to the guard in the proximal direction, the second member comprising a protrusion protruding at least partially in a radially inward direction with respect to at least a portion of the guard that is distal to the protrusion, wherein the radially inward direction is at least substantially perpendicular to a longitudinal axis of the drug delivery device, and wherein the first member contacts at least the protrusion to resist relative movement between the guard and the housing until the threshold of resistance is exceeded by the force applied to the guard in the proximal direction.