# US 11,298,464 B2 · Assembly for a drug delivery device and drug delivery device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,464 B2 - Document ID: US11298464B2 - Status: Granted - Kind: B2 - Application number: 15/958,268 - Filed: 2018-04-20 - Published: 2018-08-23 - Granted: 2022-04-12 - Earliest claimed: 2009-11-03 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GmbH - Inventors: Philippe Nzike; Steffen Raab; Uwe Dasbach; Uwe Boeser; Ulrich Bruggemann - Web page: https://patentgrep.com/patent/US11298464B2 ## CPC - A61M 5/31535: {Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose} - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 5/31555: {by purely axial movement of dose setting member, e.g. during setting or filling of a syringe} - A61M 5/31556: {Accuracy improving means} - 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 2005/2407: {from the rear} - A61M 2205/581: by audible feedback - A61M 2205/582: by tactile feedback - 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 An assembly for a drug delivery device includes a housing, a rotation member, a drive member and at least one correction member. In a delivery mode, the drive member and the rotation member are coupled such that the drive member follows rotational movement of the rotation member in a first rotational direction. In a correction mode, the rotation member and the drive member are decoupled such that the rotation member is rotatable in the first rotational direction with respect to the drive member. For switching from the delivery mode into the correction mode, the correction member is moveable with respect to the housing, wherein the assembly is configured such that movement of the correction member with respect to the housing is converted into a relative movement between the drive member and the rotation member for decoupling the drive member and the rotation member. ## Claims ### Claim 1 An assembly for a drug delivery device, the assembly comprising: a housing; a rotation member rotatable with respect to the housing, the rotation member having first teeth; and a drive member rotatable with respect to the housing, the drive member having second teeth; wherein the first teeth and the second teeth are configured to couple the drive member and the rotation member, wherein in a dose setting mode, the rotation member is configured to be rotated to set a dose of a drug, wherein in a dose correction mode different from the dose setting mode, the first teeth and the second teeth uncouple the rotation member and the drive member such that the rotation member rotates in a first rotational direction independently from the drive member to correct the set dose of the drug, and wherein in a dose delivery mode different from the dose correction mode and dose setting mode, the first teeth and the second teeth rotationally couple the rotation member and the drive member such that a rotational movement of the rotation member in the first rotational direction causes a rotational movement of the drive member in the first rotational direction to deliver the corrected dose of the drug. ### Claim 2 (depends on 1) The assembly of claim 1, further comprising a correction member movable with respect to the housing between the dose delivery mode and the dose correction mode. ### Claim 3 (depends on 2) The assembly of claim 2, wherein a movement of the correction member from the dose delivery mode to the dose correction mode is a radially inward movement with respect to the housing. ### Claim 4 (depends on 3) The assembly of claim 3, wherein the radially inward movement of the correction member with respect to the housing causes a relative axial movement between the rotation member and the drive member. ### Claim 5 (depends on 4) The assembly of claim 4, wherein either the rotation member or the drive member comprises an interaction element configured to convert the radially inward movement of the correction member with respect to the housing into the relative axial movement between the rotation member and the drive member. ### Claim 6 (depends on 5) The assembly of claim 5, wherein the interaction element comprises an oblique outer face with respect to a longitudinal axis of the housing, wherein a mechanical cooperation of the correction member and the oblique outer face causes the relative axial movement between the rotation member and the drive member. ### Claim 7 (depends on 2) The assembly of claim 2, wherein the correction member is secured against rotational movement with respect to the housing. ### Claim 8 (depends on 2) The assembly of claim 2, wherein the correction member is secured against movement along a longitudinal axis of the housing. ### Claim 9 (depends on 1) The assembly of claim 1, further comprising a stop member that is rotationally locked with respect to the housing. ### Claim 10 (depends on 9) The assembly of claim 9, wherein the first teeth and the second teeth are configured to permit relative rotational movement between the stop member and the drive member in the first rotational direction. ### Claim 11 (depends on 1) The assembly of claim 1, wherein the first teeth and the second teeth are part of a friction clutch mechanism. ### Claim 12 (depends on 11) The assembly of claim 11, wherein the friction clutch mechanism comprises a slipping clutch. ### Claim 13 (depends on 1) The assembly of claim 1, further comprising a dose member coupled to the rotation member and axially movable with respect to the housing, wherein the rotation member is configured to rotate in the first rotational direction in response to an axial movement of the dose member with respect to the housing in a first axial direction. ### Claim 14 (depends on 13) The assembly of claim 13, wherein, in the dose setting mode, axial movement of the dose member with respect to the housing in a second axial direction, opposite the first axial direction, causes rotational movement of the rotation member in a second rotational direction different from the first rotational direction without causing rotational movement of the drive member. ### Claim 15 (depends on 1) The assembly of claim 1, wherein the first teeth and the second teeth are ramp-shaped. ### Claim 16 (depends on 1) The assembly of claim 1, wherein in the dose setting mode, the rotation member is configured to be rotated in a second rotational direction, opposite the first rotational direction, with respect to the drive member for setting the dose of the drug. ### Claim 17 A drug delivery device comprising: a cartridge carrying a drug; and an assembly configured to interact with the cartridge, the assembly comprising: a housing; a rotation member rotatable with respect to the housing, the rotation member having first teeth; and a drive member rotatable with respect to the housing, the drive member having second teeth; wherein the first teeth and the second teeth are configured to couple the drive member and the rotation member, wherein in a dose setting mode, the rotation member is configured to be rotated to set a dose of a drug, wherein in a dose correction mode different from the dose setting mode, the first teeth and the second teeth uncouple the rotation member and the drive member such that the rotation member rotates in a first rotational direction independently from the drive member to correct the set dose of the drug, and wherein in a dose delivery mode different from the dose correction mode and dose setting mode, the first teeth and the second teeth rotationally couple the rotation member and the drive member such that a rotational movement of the rotation member in the first rotational direction causes a rotational movement of the drive member in the first rotational direction to deliver the corrected dose of the drug. ### Claim 18 (depends on 17) The device of claim 17, further comprising a stop member that is rotationally locked with respect to the housing, wherein the first teeth and the second teeth are configured to permit relative rotational movement between the stop member and the drive member in the first rotational direction. ### Claim 19 (depends on 17) The device of claim 17, wherein the assembly further comprises a correction member movable with respect to the housing between the dose delivery mode and the dose correction mode. ### Claim 20 (depends on 19) The device of claim 19, wherein a movement of the correction member from the dose delivery mode to the dose correction mode is a radially inward movement with respect to the housing. ### Claim 21 (depends on 17) The device of claim 17, wherein the first teeth and the second teeth are ramp-shaped. ### Claim 22 (depends on 17) The device of claim 17, wherein in the dose setting mode, the rotation member is configured to be rotated in a second rotational direction, opposite the first rotational direction, with respect to the drive member for setting the dose of the drug.