Dose setting mechanism for priming a drug delivery device

摘要

A method and system for priming a drug delivery device are provided. The drug delivery device includes a dose dial sleeve and an internal housing portion. The dose dial sleeve is coupled to the internal housing. The dose dial sleeve rotates on a substantially circumferential rotational path during priming of the drug delivery device. Further, the dose dial sleeve rotates on a helical path during dose setting of the drug delivery device.

主权项

1. A drug delivery device comprising,
a dose setting mechanism comprising, a dial sleeve; and an internal housing portion having an outer surface comprising a threaded rotational path that is separate from a threaded helical path, wherein the dial sleeve surrounds and is coupled to the outer surface of the internal housing portion such that the dial sleeve rotates relative to the internal housing during priming and dose setting, wherein the dial sleeve is threadedly engaged with and configured to first rotate on the rotational path portion without axial translation along the internal housing during priming of the drug delivery device and then to threadedly engaged with and translate along the helical path during dose setting of the drug delivery device, wherein the dose setting mechanism is further configured to force a user to prime the drug delivery device before dialing a first dose for injection such that the drug delivery device is primed before a first dose can be set.