# US 11,077,257 B2 · Autoinjector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,257 B2 - Document ID: US11077257B2 - Status: Granted - Kind: B2 - Application number: 16/355,691 - Filed: 2019-03-15 - Published: 2019-07-11 - Granted: 2021-08-03 - Earliest claimed: 2013-07-09 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GMBH - Inventors: Thomas Kemp - Web page: https://patentgrep.com/patent/US11077257B2 ## CPC - A61M 5/3204: {Needle cap removers, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices} - A61M 5/2033: {Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287)} - A61M 5/206: {with automatic needle insertion} - A61M 5/326: {Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user} - A61M 5/5086: {for indicating if defective, used, tampered with or unsterile} - A61M 2005/208: {Release is possible only when device is pushed against the skin, e.g. using a trigger which is blocked or inactive when the device is not pushed against the skin} - A61M 2005/3247: {Means to impede repositioning of protection sleeve from needle covering to needle uncovering position} - 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 autoinjector includes a case, a needle shroud telescopically coupled to the case, a carrier slidably arranged in the case, a collar rotatably and slidably disposed in the case and coupled to the needle shroud and the carrier, and a trigger button operably coupled to the carrier. The case includes a rib. The needle shroud is movable between a first extended position, a retracted position, and a locked second extended position. The carrier is adapted to hold a medicament container and movable from a first axial position to a second axial position relative to the case. The carrier abuts the rib in the first axial position and the needle shroud is in the first extended position and disengages the rib when the needle shroud is in the retracted position and the trigger button is pressed to advance the carrier to the second axial position. ## Claims ### Claim 1 An autoinjector comprising: a case including a rib; a needle shroud telescopically coupled to the case and movable between a first extended position, a retracted position and a locked second extended position; a carrier arranged in the case and adapted to hold a medicament container; a plunger slidably coupled to the carrier; a drive spring arranged in the plunger, the drive spring biasing the plunger relative to the carrier, wherein the plunger is movable from a first axial position to a second axial position relative to the case; and a collar slidably disposed in the case, the collar coupled to the needle shroud, wherein the needle shroud is configured to move to the first extended position when the needle shroud is moved to the retracted position to advance the plunger to the second axial position, wherein, in the second axial position, a portion of the plunger is arranged within the medicament container. ### Claim 2 (depends on 1) The autoinjector according to claim 1, wherein the carrier includes a compliant beam having a boss adapted to engage an opening in the plunger when the carrier is in a first axial position. ### Claim 3 (depends on 2) The autoinjector according to claim 2, wherein the boss is adapted to engage the case when the carrier is in a second axial position. ### Claim 4 (depends on 1) The autoinjector according to claim 1, wherein the collar includes a first boss adapted to engage a slot in the case and a second boss adapted to engage a plunger boss on the plunger. ### Claim 5 (depends on 1) The autoinjector according to claim 1, wherein the collar is in a first angular position relative to the case when the needle shroud is in the first extended position and the carrier is in a first axial position. ### Claim 6 (depends on 5) The autoinjector according to claim 5, wherein the collar is configured to rotate to a second angular position relative to the case when the needle shroud moves from the first extended position to the retracted position. ### Claim 7 (depends on 1) The autoinjector according to claim 1, wherein the collar is configured to translate proximally relative to the case when the needle shroud moves from the first extended position to the retracted position. ### Claim 8 (depends on 7) The autoinjector according to claim 7, wherein the collar is configured to translate distally relative to the case when the needle shroud is in the retracted position and the carrier moves from a first axial position to a second axial position. ### Claim 9 (depends on 8) The autoinjector according to claim 8, wherein the carrier includes a compliant beam having a boss adapted to engage an opening in the plunger when the carrier is in the first axial position, and wherein the boss is configured to disengage from the opening and abut the case when the carrier is in the second axial position. ### Claim 10 (depends on 8) The autoinjector according to claim 8, wherein the plunger is configured to translate axially relative to the carrier under a force of the drive spring advancing the plunger from the first axial position to the second axial position relative to the case. ### Claim 11 (depends on 10) The autoinjector according to claim 10, wherein the collar rotates to a third angular position relative to the case and translates with the needle shroud distally relative to the case when the carrier is moved to a third axial position. ### Claim 12 (depends on 10) The autoinjector according to claim 10, wherein the collar is configured to rotate to a fourth angular position relative to the case when the needle shroud is moved to the locked second extended position. ### Claim 13 (depends on 12) The autoinjector according to claim 12, wherein the collar includes a first boss adapted to engage a slot in the case and a second boss adapted to engage a plunger boss on the plunger, and wherein the first boss is adapted to abut a surface in a carrier slot of the carrier when the collar is in the fourth angular position and the needle shroud is in the locked second extended position. ### Claim 14 (depends on 13) The autoinjector according to claim 13, wherein engagement of the second boss and the plunger boss substantially fixes the collar in an axial position relative to the case. ### Claim 15 (depends on 1) The autoinjector according to claim 1, further comprising: a control spring biasing the collar relative to the case. ### Claim 16 (depends on 1) The autoinjector according to claim 1, wherein the carrier includes a compliant beam adapted to engage the rib when the carrier is in first and second axial positions. ### Claim 17 (depends on 16) The autoinjector according to claim 16, wherein the needle shroud includes a ramp adapted to engage and deflect a plunger boss of the collar as the needle shroud translates from the first extended position to the retracted position. ### Claim 18 A drive mechanism for a medicament delivery device, the drive mechanism comprising: a needle shroud movable between a first extended position, a retracted position and a locked second extended position; a plunger movable from a first axial position to a second axial position; a drive spring arranged in the plunger, the drive spring configured to bias the plunger toward the second axial position; and a collar coupled to the needle shroud, wherein the needle shroud is configured to move to the first extended position when the needle shroud is moved to the retracted position to advance the plunger to the second axial position, wherein, in the second axial position, a portion of the plunger is arranged within the medicament container. ### Claim 19 (depends on 18) The drive mechanism according to claim 18, further comprising a carrier adapted to hold a medicament container, wherein the plunger is slidably coupled to the carrier, and wherein the carrier includes a compliant beam having a boss adapted to engage an opening in the plunger when the carrier is in a first axial position. ### Claim 20 An autoinjector comprising: a case including a rib; a needle shroud telescopically coupled to the case and movable between a first extended position, a retracted position and a locked second extended position; a carrier arranged in the case and adapted to hold a medicament container; a plunger slidably coupled to the carrier, wherein the plunger is arranged to abut a stopper within the medicament container; a drive spring arranged in the plunger, the drive spring biasing the plunger relative to the carrier, wherein the plunger is movable from a first axial position to a second axial position relative to the case; and a collar slidably disposed in the case, the collar coupled to the needle shroud, wherein the needle shroud is configured to move to the first extended position when the needle shroud is moved to the retracted position to advance the plunger to the second axial position.