A medication delivery pen is provided having a medication cartridge assembly, a pen body assembly and a cap. The pen body assembly includes a dose setting mechanism and a dose delivery mechanism that are selectively disconnected and connected by attaching and removing, respectively, the cap of the...http://www.google.es/patents/US5674204?utm_source=gb-gplus-sharePatente US5674204 - Medication delivery pen cap actuated dose delivery clutch
Medication delivery pen cap actuated dose delivery clutch
