Patent attributes
A medication delivery device is equipped with a sensing system to determine the amount of a dose set and/or delivered by operation of the device. Such amount is determined based on the sensing of relative rotational and/or axial movements during dose setting or delivery between members of the medication delivery device, where the sensed movements are correlated as applicable to the amount of the dose set. The device includes one or more wiper assemblies coupled to one or more rotatable device members. Sensing bands are coupled to another device member, and arranged in contacting relationship with wipers. During relative rotation and/or axial movement between the device members, each sensing band is operable to generate an output associated with the relative angular and/or linear position of the wiper along an operational angular length of the sensing bands indicative of relative rotational positions of the device members.
