# US 11,077,250 B2 · Medicament delivery device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,250 B2 - Document ID: US11077250B2 - Status: Granted - Kind: B2 - Application number: 15/739,967 - Filed: 2016-06-27 - Published: 2018-07-05 - Granted: 2021-08-03 - Earliest claimed: 2015-07-03 - Assignees: Shl Medical AG - Applicants: Carebay Europe Ltd. - Inventors: Stefan Hogdahl - Web page: https://patentgrep.com/patent/US11077250B2 ## CPC - 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 5/3157: {Means providing feedback signals when administration is completed (A61M5/20 takes precedence)} - 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 5/206: {with automatic needle insertion} - A61M 2005/2013: {triggering of discharging means by contact of injector with patient body} - 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 2205/581: by audible 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 The present invention relates to a medicament delivery device comprising a housing (16, 18), arranged to accommodate a medicament container (26); a power unit (64) arranged inside said housing, said power unit comprising a plunger rod (112), a drive spring (114) operably arranged to act on the plunger rod (112) and, which is, upon activation, operably arranged to act on said medicament container (26), an actuator (90) comprising holding elements (94, 100), capable of releasably holding said plunger rod (1112) with said drive spring (114) in a tensioned state, and an actuator sleeve (76) operably connected to said actuator (90) for releasably locking said holding elements (94, 100) in a holding state; said medicament delivery device further comprising a medicament delivery member guard (34) slidably movable in said housing (16, 18) and arranged to act on said actuator sleeve (76) for setting said holding elements (94, 100) with said actuator sleeve (76) in a first activation state; an activator unit (124) arranged to be manually operated and, which is, operably connected to said plunger rod (112) for setting said holding elements (94, 100) with said actuator sleeve (76) in a second activation state, wherein said plunger rod (112) is released when both activation states are set. ## Claims ### Claim 1 A medicament delivery device comprising: a housing, arranged to accommodate a medicament container; a power unit arranged inside said housing, said power unit comprising: a plunger rod, a drive spring operably arranged to act on the plunger rod and, which is, upon activation, operably arranged to act on said medicament container, an actuator comprising a plurality of holding elements, capable of releasably holding said plunger rod with said drive spring in a tensioned state, and an actuator sleeve operably connected to said actuator for releasably locking said plurality of holding elements in a holding state, wherein said plurality of holding elements comprise a plurality of tongues arranged with ledges arranged to engage recesses in said plunger rod; said medicament delivery device further comprising: a medicament delivery member guard slidably movable in a distal direction in said housing and arranged to act on said actuator sleeve for moving said actuator sleeve distally in relation to the actuator and for setting said holding elements with said actuator sleeve in a first activation state; an activator unit comprising push elements arranged to act on an end surface of said plunger rod, wherein said activator unit is slidably movable and arranged to be manually operated in a proximal direction to move said plunger rod and thereby said holding elements proximally for setting said holding elements with said actuator sleeve in a second activation state, and wherein said plunger rod is released when both activation states are set. ### Claim 2 (depends on 1) The medicament delivery device according to claim 1, further comprising: a medicament delivery member guard spring arranged to force said medicament delivery member guard in a proximal direction after removal of said medicament delivery device. ### Claim 3 (depends on 1) The medicament delivery device according to claim 1, wherein said plunger rod comprises a hollow plunger rod that defines an internal cavity. ### Claim 4 (depends on 3) The medicament delivery device according to claim 3, wherein said drive spring is arranged inside said internal cavity defined by said hollow plunger rod. ### Claim 5 (depends on 4) The medicament delivery device according to claim 4, further comprising: a guide rod that extends through the drive spring. ### Claim 6 (depends on 1) The medicament delivery device according to claim 1, further comprising: a medicament container holder arranged to accommodate the medicament container. ### Claim 7 (depends on 6) The medicament delivery device according to claim 6, wherein said medicament container holder is slidably and coaxially arranged inside said medicament delivery member guard. ### Claim 8 (depends on 7) The medicament delivery device according to claim 7, wherein the medicament container holder comprises a guide surface, wherein said guide surface is suitable to cooperate with a corresponding shape of an inner surface of the medicament delivery member guard in order to obtain a stop mechanism against rotation of the medicament container holder relative to the medicament delivery member guard. ### Claim 9 (depends on 1) The medicament delivery device according to claim 1, further comprising: an end-of-dose signal mechanism, and a plurality of lock/release elements arranged to releasably locking said actuator until said plunger rod has reached a proximal end position, wherein said plurality of lock/release elements release said actuator, whereby said actuator is urged in the distal direction by said drive spring so that said actuator produces an end-of-dose signal. ### Claim 10 (depends on 9) The medicament delivery device according to claim 9, wherein said plurality of lock/release elements comprise said holding elements. ### Claim 11 (depends on 10) The medicament delivery device according to claim 10, wherein said holding elements are arranged in a locking position by said plunger rod. ### Claim 12 (depends on 11) The medicament delivery device according to claim 11, further comprising: a medicament delivery member guard locking signal mechanism, wherein said medicament delivery member guard locking mechanism comprises said plurality of tongues interacting with a distally directed ledge on an inner surface of said actuator sleeve such that movement of said medicament delivery member guard in the proximal direction will cause said plurality of tongues to pass said ledge and flex in a generally radial direction, generating a medicament delivery member guard locking signal. ### Claim 13 (depends on 12) The medicament delivery device according to claim 12, whereby the engagement of said plurality of tongues with the ledge will lock movement of medicament delivery member guard in the distal direction. ### Claim 14 (depends on 12) The medicament delivery device according to claim 12, wherein the medicament delivery member guard locking signal comprises an audible signal. ### Claim 15 (depends on 10) The medicament delivery device according to claim 10, further comprising: a medicament delivery member guard locking mechanism, wherein said medicament delivery member guard locking mechanism comprises said plurality of tongues interacting with a distally directed ledge on an inner surface of said actuator sleeve such that movement of said medicament delivery member guard in the proximal direction will cause said plurality of tongues to pass said ledge and flex in a generally radial direction, whereby the engagement of said plurality of tongues with the ledge will lock movement of medicament delivery member guard. ### Claim 16 (depends on 9) The medicament delivery device according to claim 9, wherein said plurality of lock/release elements release said actuator, whereby said actuator is urged in the distal direction by said drive spring so that said actuator hits a surface of the housing, producing said end-of-dose signal. ### Claim 17 (depends on 9) The medicament delivery device according to claim 9, wherein said end-of-dose signal comprises an audible end-of-dose signal.