Patent ID: 9186465
Filing Date: 2015-11-17
Classification: A61M

Abstract:
1. A drug delivery device for setting and injecting set doses of a drug from a drug-filled reservoir comprising a Gray code type detector for detecting relative movement between a first element and a second element during dose setting and/or during injection, said Gray code type detector comprising: a plurality of alternating first and second areas disposed on said first element, wherein said first and second areas are configured to first and second states, respectively, and wherein each of said first areas comprise width X wherein a plurality of detectors comprises m detectors, wherein m is at least three wherein each of the m detectors is disposed on said second element and is configured to sense said first and second states wherein said detectors are arranged in a direction respective to said first and second areas' longitude so as to sense said first and second states and provide a reading sequence of a Gray code scheme when said detectors are moved relatively to said first and second areas.