Amgen Inc.
DRUG DELIVERY DEVICE HAVING A NEEDLE GUARD MECHANISM WITH A TUNABLE THRESHOLD OF RESISTANCE TO NEEDLE GUARD MOVEMENT

Abstract:

A device, method, and system for drug delivery includes a casing for housing a drug storage container, the drug storage container including a dose delivery member, at least a portion of the dose delivery member extending through an opening in the casing; a guard movable relative to the casing between extended and retracted positions, the portion of the dose delivery member being surrounded by the guard in the extended position and the portion of the dose delivery member being at least partially exposed when the guard is in the retracted position; an interference arrangement for providing selected threshold of resistance to movement of the guard from the extended position to the retracted position during insertion of the dose delivery member into body tissue at an injection site, the detent arrangement having a first member associated with a surface within the casing, and a second member extending from the guard, the first and second members engaging one another to retain the guard in the extended position, one of the first and second members moving if the selected threshold of resistance is exceeded to allow the members to slide past one another to allow the guard to move into the retracted position when the device is pressed toward the injection site during insertion of the dose delivery member.