US 12,447,287 B2
Autoinjector
Thomas Kemp, Ashwell (GB)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by Sanofi-Aventis Deutschland GmbH, Frankfurt am Main (DE)
Filed on Jan. 16, 2025, as Appl. No. 19/025,432.
Application 19/025,432 is a continuation of application No. 18/671,353, filed on May 22, 2024.
Application 18/671,353 is a continuation of application No. 17/391,104, filed on Aug. 2, 2021, granted, now 12,011,576, issued on Jun. 18, 2024.
Application 17/391,104 is a continuation of application No. 16/355,691, filed on Mar. 15, 2019, granted, now 11,077,257, issued on Aug. 3, 2021.
Application 16/355,691 is a continuation of application No. 14/903,383, granted, now 10,232,125, issued on Mar. 19, 2019, previously published as PCT/EP2014/064422, filed on Jul. 7, 2014.
Claims priority of application No. 13175659 (EP), filed on Jul. 9, 2013.
Prior Publication US 2025/0152850 A1, May 15, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/20 (2006.01); A61M 5/32 (2006.01); A61M 5/50 (2006.01)
CPC A61M 5/3204 (2013.01) [A61M 5/2033 (2013.01); A61M 2005/206 (2013.01); A61M 2005/208 (2013.01); A61M 2005/3247 (2013.01); A61M 5/326 (2013.01); A61M 5/5086 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An auto-injector comprising:
a case comprising a transparent portion for allowing a medicament within a syringe to be viewed from an exterior of the case when the syringe containing the medicament is disposed in the case;
a cap removably attached to a distal end of the case, the cap configured to engage a protective needle sheath covering a needle of the syringe when the syringe is in the auto-injector such that the protective needle sheath is removed from the needle of the syringe when the cap is removed from the case, the auto-injector being configured to hold the syringe stationary in the case as the cap is removed from the case;
a carrier disposed in the case, the carrier comprising a proximal part and a distal part, the distal part of the carrier being configured to surround a barrel of the syringe when the syringe is disposed in the case;
a plunger disposed in the proximal part of the carrier and releasably held by the proximal part of the carrier to hold the plunger in a proximal position within the auto-injector, the case configured to allow a portion of the plunger to be viewed from the exterior of the case through the transparent portion of the case;
a trigger button disposed at a proximal end of the auto-injector, the trigger button configured to be depressed in a distal direction relative to the case to radially deflect respective ramped portions of two axially-extending beams to release the plunger from being held in the proximal position by the proximal part of the carrier such that the plunger moves in the distal direction relative to the carrier and the case by a distally-directed biasing force of a compression drive spring to displace a stopper within the syringe to dispense the medicament from the syringe through the needle for injection into an injection site, and generate an audible or tactile feedback to indicate a status of the auto-injector, the two axially-extending beams being disposed between two axial ends of the compression drive spring; and
a cylindrical collar configured to rotate relative to the case about a longitudinal axis of the case after the trigger button has been depressed relative to the case, the cylindrical collar comprising a boss extending in a radially outward direction from the cylindrical collar that rotates with the cylindrical collar as the cylindrical collar rotates relative to the case,
wherein the auto-injector is configured such that after dispensing the medicament from the syringe, a movement of the cylindrical collar relative to the case is limited by an engagement between the distal part of the carrier and the cylindrical collar to limit a re-use of the auto-injector.