US Patent 9616178 Dose setting mechanism and method of using the same

The present invention relates to a dose setting mechanism for a drug delivery device and a method of using same. The mechanism comprises a drug delivery device housing, a dose dial component positioned in the housing and rotatable during dose setting and dose delivery, a clutch rotatable during dose setting and non-rotatable during dose delivery having, preferably located at a distal end, clutch teeth, and a clutch ring engaged with the housing in a first rotatable configuration and in a second non-rotatable configuration.