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

Claim 14:
15. A method of delivering a drug to a user, the method comprising:
providing a drug delivery device comprising a housing having an opening, a drug storage container having a delivery member having an insertion end, 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 coupled with the housing, a guard biasing member positioned at least partially distal to a proximal end 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, the arrangement including a first member and a second member coupled with the guard to move jointly with the guard when the guard moves between an extended position and a retracted position, the first member being disposed entirely within the guard, 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, 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;
positioning the guard in contact with a user at an injection site; and
applying the force to the guard in the proximal direction sufficient to exceed the threshold of resistance and permit relative movement between the guard and the housing,
wherein the first member contacts at least the protrusion and rotates as a result of the force being applied to the guard in the proximal direction.