# US 10,869,969 B2 · Injection device with protective cap allowing electromagnetic field induction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,869,969 B2 - Document ID: US10869969B2 - Status: Granted - Kind: B2 - Application number: 15/779,010 - Filed: 2016-11-21 - Published: 2018-11-29 - Granted: 2020-12-22 - Earliest claimed: 2015-11-27 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GmbH - Inventors: Stefan Wendland; Michael Harms - Web page: https://patentgrep.com/patent/US10869969B2 ## CPC - A61M 5/3202: {Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; protectors for sharps A61B50/3001)} - A61M 5/3213: {Caps placed axially onto the needle, e.g. equipped with finger protection guards (axially-extensible protective sleeves A61M5/3243)} - A61M 5/20: Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 takes precedence) - A61M 2005/3104: {Caps for syringes without needle} - A61M 2005/3254: {Shielding of proximal needles, e.g. for pen needles} - A61M 2205/8243: by induction - A61M 2205/8293: Solar - 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 injection device comprising: a housing arranged to contain a liquid medicament or a medicament cartridge; an electrical coil arranged at the housing; a removable cap arranged to be removably engaged with an end of the housing; and a magnet arranged within the removable cap; wherein when the removable cap is disengaged from the housing, the magnet moves with respect to the electrical coil such that electrical voltage is induced in the electrical coil and a current is generated. ## Claims ### Claim 1 An injection device comprising: a housing arranged to contain a liquid medicament or a medicament cartridge, the housing comprising a proximal end and a distal end; an electrical coil arranged at the housing, the electrical coil comprising a first end and a second end, the first end of the electrical coil being closer to the distal end of the housing than the second end of the electrical coil; a removable cap arranged to be removably engaged with an end of the housing; and a magnet arranged within the removable cap, wherein when the removable cap is engaged with the housing, the magnet is positioned within the electrical coil; wherein when the removable cap is disengaged from the housing, the magnet moves within the electrical coil from the first end of the electrical coil to the second end of the electrical coil such that electrical voltage is induced in the electrical coil and a current is generated, and wherein operation of the injection device is prevented when the removable cap is engaged with the housing. ### Claim 2 (depends on 1) The injection device of claim 1, further comprising an energy storage apparatus electrically connected to the electrical coil, wherein the current is generated to charge the energy storage apparatus. ### Claim 3 (depends on 2) The injection device of claim 2, wherein the energy storage apparatus comprises a capacitor. ### Claim 4 (depends on 2) The injection device of claim 2, further comprising a solar cell arranged on an outer surface of the injection device, wherein electrical current generated by the solar cell is stored in at least one of the energy storage apparatus and/or an additional energy storage apparatus. ### Claim 5 (depends on 1) The injection device of claim 1, wherein the electrical coil is arranged around an inner surface of the housing. ### Claim 6 (depends on 1) The injection device of claim 1, wherein the electrical coil is arranged around an outer surface of the housing. ### Claim 7 (depends on 1) The injection device of claim 1, wherein the electrical coil is arranged at the distal end of the housing. ### Claim 8 (depends on 1) The injection device of claim 1, further comprising at least one light source arranged on an outer surface of the injection device, the at least one light source being configured to be powered by the generated current. ### Claim 9 (depends on 8) The injection device of claim 8, wherein the at least one light source is illuminated to indicate an operational state of the injection device. ### Claim 10 (depends on 1) The injection device of claim 1, further comprising a RFID transducer configured to be powered by the generated current. ### Claim 11 (depends on 10) The injection device of claim 10, wherein the RFID transducer is configured to communicate information related to a quantity of medicament contained within the housing. ### Claim 12 (depends on 1) An injection device as claimed in claim 1, wherein the housing contains liquid medicament or a medicament cartridge. ### Claim 13 (depends on 12) The injection device of claim 12, wherein the injection device further comprises an injection needle arranged for discharging liquid medicament. ### Claim 14 (depends on 13) The injection device of claim 13, wherein the removable cap is arranged such that removal of the removable cap from the housing exposes the injection needle for injection. ### Claim 15 (depends on 1) An injection device as claimed in claim 1, wherein the injection device includes a medicament. ### Claim 16 (depends on 15) The injection device of claim 15, wherein the medicament comprises injectable insulin. ### Claim 17 A method comprising: disengaging a removable cap from an injection device such that a magnet disposed within the removable cap moves with respect to an electrical coil comprising a first end and a second end and arranged at a housing of the injection device, inducing an electrical voltage in the electrical coil and generating a current, wherein when the removable cap is engaged with the housing, the magnet is positioned within the electrical coil and upon disengaging the removable cap from the housing, the magnet moves within the electrical coil from the first end of the electrical coil to the second end of the electrical coil to induce the electrical voltage in the electrical coil and generate the current, wherein operation of the injection device is prevented when the removable cap is engaged with the injection device, and operation of the injection device is permitted when the removable cap is disengaged from the housing. ### Claim 18 (depends on 17) The method of claim 17, further comprising using the current to charge an electrical storage apparatus electrically connected to the electrical coil. ### Claim 19 (depends on 17) The method of claim 17, further comprising using the current to illuminate at least one light source. ### Claim 20 (depends on 17) The method of claim 17, further comprising exposing an injection needle for injection.