# US 11,439,770 B2 · Injection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,770 B2 - Document ID: US11439770B2 - Status: Granted - Kind: B2 - Application number: 15/778,120 - Filed: 2016-11-21 - Published: 2019-01-03 - Granted: 2022-09-13 - Earliest claimed: 2015-11-27 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GmbH - Inventors: Stefan Wendland; Michael Harms; Uwe Dasbach; Jan Torben Eickriede - Web page: https://patentgrep.com/patent/US11439770B2 ## CPC - A61M 5/3204: {Needle cap removers, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices} - A61M 5/3202: {Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; protectors for sharps A61B50/3001)} - 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 5/20: Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 takes precedence) - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 2005/3267: {Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body} - 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 an injection device. The injection device comprises a body for holding a syringe having a needle extending from one end thereof and a cap that is removably attached to the body. The cap has a needle shield to cover said needle. The injection device further comprises a biasing member and a lock. The biasing member is configured to urge at least a part of the cap away from the body. The lock is moveable between a locked state, wherein the lock holds the cap and body together, and an unlocked state, wherein the cap and body are able to move apart. ## Claims ### Claim 1 An injection device comprising: a body for holding a syringe having a needle at one end thereof; a cap that is removably attached to the body and has an outer cap and a needle shield configured to frictionally engage with the syringe to cover the needle; a biasing member that is configured to urge the cap away from the body; and, a lock comprising a latch or bayonet connection that is moveable between a locked state, wherein the lock holds the cap and body together, and an unlocked state, wherein the cap and body are able to move apart, wherein the outer cap is rotatable relative to the body to move the lock to the unlocked state, and wherein a biasing force of the biasing member is configured to overcome friction between the cap and the body to separate the needle shield from the syringe in the unlocked state. ### Claim 2 (depends on 1) The injection device according to claim 1, wherein the biasing member is configured to bias the entire cap away from the body when the lock is in the unlocked state. ### Claim 3 (depends on 1) The injection device according to claim 1, wherein the biasing member is a helical spring. ### Claim 4 (depends on 1) The injection device according to claim 1, wherein the cap is moveable relative to the body in a first direction to move the lock from the locked state to an intermediate state, and wherein the cap is moveable relative to the body in a second direction distinct from the first direction to move the lock from the intermediate state to the unlocked state. ### Claim 5 (depends on 1) The injection device according to claim 1, wherein the lock comprises a track on one of the body and cap and a pin on the other one of the body and cap, wherein the track extends non-linearly and the pin is configured to be received in the track. ### Claim 6 (depends on 5) The injection device according to claim 5, comprising a projection in the track that is configured to resist movement of the pin in the track. ### Claim 7 (depends on 1) The injection device according to claim 1, further comprising a needle sleeve, wherein the needle sleeve is moveable relative to the body between an extended position, to shield the needle when a syringe is held within the body, and a retracted position, wherein the needle extends axially past an end of the needle sleeve, wherein the needle sleeve moves to the extended position when the lock is in the unlocked state and the cap is removed from the body. ### Claim 8 (depends on 7) The injection device according to claim 7, wherein the lock is configured such that when the cap is attached to the body the needle sleeve is urged into the body. ### Claim 9 (depends on 1) The injection device according to claim 1, comprising the syringe, wherein the syringe is received by the body, wherein the needle shield is in frictional engagement with the syringe when the cap is attached to the body. ### Claim 10 (depends on 1) The injection device according to claim 1, further comprising the syringe, wherein the syringe contains a medicament. ### Claim 11 (depends on 1) The injection device according to claim 1, wherein the injection device is an auto-injector. ### Claim 12 (depends on 1) The injection device according to claim 1, wherein the cap comprises the biasing member. ### Claim 13 A method of removing a cap from an end of a body of an injection device, the cap comprising an outer cap and a needle shield to frictionally engage with a syringe, comprising the steps of: rotating the outer cap about a longitudinal axis of the body to move a lock of the injection device to a unlocked state, wherein the cap is held in place with the body against a force of a biasing member by the lock in a locked state prior to rotation of the outer cap, the lock comprising a latch or bayonet connection; and removing the cap from the end of the body, wherein the cap is urged away from the body by the force of the biasing member, and wherein the biasing force of the biasing member is configured to overcome friction between the cap and the body to separate the needle shield from the syringe in the unlocked state. ### Claim 14 (depends on 13) The method according to claim 13, wherein the biasing member is configured to bias the entire cap away from the body when the lock is in the unlocked state. ### Claim 15 (depends on 13) The method according to claim 13, wherein the biasing member is a helical spring. ### Claim 16 (depends on 13) The method according to claim 13, wherein the cap is moveable relative to the body in a first direction to move the lock from the locked state to an intermediate state, and wherein the cap is moveable relative to the body in a second direction distinct from the first direction to move the lock from the intermediate state to the unlocked state. ### Claim 17 (depends on 13) The method according to claim 13, wherein the lock comprises a track on one of the body and cap and a pin on the other one of the body and cap, wherein the track extends non-linearly and the pin is configured to be received in the track. ### Claim 18 (depends on 17) The method according to claim 17, wherein the injection device comprises a projection in the track that is configured to resist movement of the pin in the track. ### Claim 19 (depends on 13) The method according to claim 13, wherein the injection device comprises a needle sleeve, wherein the needle sleeve is moveable relative to the body between an extended position, to shield a needle when a syringe is held within the body, and a retracted position, wherein the needle extends axially past an end of the needle sleeve, wherein the needle sleeve moves to the extended position when the lock is in the unlocked state and the cap is removed from the body. ### Claim 20 (depends on 19) The method according to claim 19, wherein the lock is configured such that when the cap is attached to the body the needle sleeve is urged into the body.