MEDICATION DELIVERY PEN HAVING AN IMPROVED CLUTCH ASSEMBLY

摘要

An improved medication delivery pen is provided for injecting fluids such as insulin within body tissue. The medication delivery pen includes a mechanism that prevents the removal of a cartridge unless an injector button on the medicat ion pen is in a predefined position, a bayonet attachment and an improved clutch assembly in a dose setting mechanism that provides improved control over the torque necessary t o rotate units counter ring in the medication delivery pen using a dose setting knob.