# US 11,439,766 B2 · Dose detection module for a medication delivery device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,766 B2 - Document ID: US11439766B2 - Status: Granted - Kind: B2 - Application number: 16/633,630 - Filed: 2018-02-22 - Published: 2020-07-02 - Granted: 2022-09-13 - Earliest claimed: 2017-08-21 - Assignees: Eli Lilly and Company - Applicants: Eli Lilly and Company - Inventors: Matthew Thomas Antonelli; William Churchill Taliaferro Burke; Roy Howard Byerly; Russell Wayne Perkins; Kenneth Alan Ritsher; Elias Raad Samia - Web page: https://patentgrep.com/patent/US11439766B2 ## CPC - A61M 5/31568: {Means keeping track of the total dose administered, e.g. since the cartridge was inserted} - A61M 5/0091: {Rotatable add-on modules} - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 5/3155: {by rotational movement of dose setting member, e.g. during setting or filling of a syringe} - A61M 5/31551: {including axial movement of dose setting member} - A61M 5/31585: {the component being manually operated or triggered by an axially moving actuator operated by user, e.g. an axially movable injection button} - A61M 2205/3584: using modem, internet or Bluetooth® - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract The present disclosure relates to a dose detection system for use with a medication delivery device in which a dose setting member rotates relative to an actuator during dose delivery. The dose detection system comprises a module including a rotation sensor attached to the actuator during dose delivery. A sensed element is attached to the dose setting member and includes first gear teeth. The rotation sensor comprises a driven gear including second gear teeth. The second gear teeth are operatively received by the first gear teeth and are driven in rotation as the first gear teeth rotate during dose delivery. The rotation sensor is responsive to the rotation of the second gear teeth to detect the rotation of the dose setting member. ## Claims ### Claim 1 A medication delivery device comprising: a device body; a dose setting member attached to said device body and rotatable relative to said device body about a first axis of rotation during dose delivery; a sensed element attached to and rotationally fixed with said dose setting member, said sensed element including first gear teeth radially-spaced about the first axis of rotation of said dose setting member; an actuator attached to said device body, said actuator being axially and rotationally fixed with said dose setting member and rotatable about the first axis of rotation in a first operating mode during dose setting, said actuator being non-rotatable relative to said device body in a second operating mode during dose delivery, said sensed element and said dose setting member rotating relative to said actuator during dose delivery in relation to the amount of dose delivered; a dose detection module attached to said actuator and located proximal to said actuator, said module defining an internal compartment comprising a rotation sensor attached to said actuator during dose delivery, said rotation sensor including second gear teeth radially-spaced and rotational about a second axis of rotation, the second gear teeth being operatively received by the first gear teeth of said sensed element such that the second gear teeth are driven in rotation about the second axis of rotation as the first gear teeth rotate about the first axis of rotation during rotation of said sensed element relative to said actuator during dose delivery, said rotation sensor being responsive to the rotation of the second gear teeth to detect the rotation of the dose setting member; and a controller responsive to said rotation sensor to determine the amount of dose delivery based on the detected rotation of said dose setting member relative to said actuator during dose delivery. ### Claim 2 (depends on 1) The medication delivery device of claim 1 in which the first gear teeth extend radially outward. ### Claim 3 (depends on 1) The medication delivery device of claim 1 in which said rotation sensor comprises an encoder including a drive gear comprising the second gear teeth. ### Claim 4 (depends on 3) The medication delivery device of claim 3 in which the encoder includes a body positioned proximally of the first gear teeth, and in which the drive gear is axially-aligned with the first gear teeth. ### Claim 5 (depends on 1) The medication delivery device of claim 1 in which said dose setting member extends proximally of said actuator. ### Claim 6 (depends on 5) The medication delivery device of claim 5 in which the first gear teeth extend radially inward. ### Claim 7 (depends on 6) The medication delivery device of claim 6 in which the second gear teeth are positioned proximally of said actuator and extend radially outward. ### Claim 8 (depends on 1) The medication delivery device of claim 1 in which said dose detection module is removably attached to said actuator. ### Claim 9 (depends on 8) The medication delivery device of claim 8 in which said dose setting member comprises an exterior surface exposed outside of said device body, said sensed element being attached to the exposed exterior surface. ### Claim 10 (depends on 9) The medication delivery device of claim 9 in which said sensed element is removably attached to the exposed exterior surface. ### Claim 11 (depends on 9) The medication delivery device of claim 9 in which the second gear teeth are axially-aligned with the first gear teeth and with the exposed exterior surface, and in which the module includes an outer wall extending distally to axially cover the first and second gear teeth. ### Claim 12 (depends on 11) The medication delivery device of claim 11 in which said rotation sensor comprises an encoder including a drive gear comprising the second gear teeth. ### Claim 13 (depends on 12) The medication delivery device of claim 12 in which the encoder is attached to the outer wall of said module. ### Claim 14 (depends on 10) The medication delivery device of claim 10 in which said module includes an inner wall defining said internal compartment and an outer wall surrounding the inner wall. ### Claim 15 (depends on 14) The medication delivery device of claim 14 in which said rotation sensor comprises an encoder including a drive gear comprising the second gear teeth, in which the encoder is attached to the inner wall of said module. ### Claim 16 (depends on 14) The medication delivery device of claim 14 in which said sensed element extends between the inner wall and the outer wall from said dose setting member to proximally of said actuator. ### Claim 17 (depends on 16) The medication delivery device of claim 16 in which the first gear teeth extend radially inward. ### Claim 18 (depends on 17) The medication delivery device of claim 17 in which the second gear teeth are positioned proximally of said actuator and extend radially outward, in which said dose setting member comprises an exterior surface exposed outside of said device body, said sensed element being attached to the exposed exterior surface and extending proximally of the exposed exterior surface, the first gear teeth being positioned proximally of said actuator and the second gear teeth being axially-aligned with the first gear teeth. ### Claim 19 (depends on 1) The medication delivery device of claim 1 in which the second axis of rotation is different than the first axis of rotation or in parallel to the first axis of rotation. ### Claim 20 (depends on 1) The medication delivery device of claim 1, comprising a reservoir of a medication disposed within the device body.