US 12,453,824 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. 19/025,482.
Application 19/025,482 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 2025/0152851 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. A method comprising:
viewing a medicament of a syringe from an exterior of a case of an auto-injector while the syringe is inside the case by viewing the medicament through a transparent portion of the case;
removing a cap from a distal end of the case to remove a protective needle sheath covering a needle of the syringe while the auto-injector limits a distal movement of the syringe relative to the case;
after removing the cap from the distal end of the case, moving a first part of the auto-injector relative to the case from (i) a first position in which a depression of a trigger button relative to the case in a distal direction is prevented to (ii) a second position in which the depression of the trigger button relative to the case in the distal direction is allowed;
while the first part is in the second position, depressing the trigger button relative to the case in the distal direction to radially deflect two axially-extending beams to release a plunger of the auto-injector from being held by a proximal part of a carrier of the auto-injector such that the plunger moves in the distal direction relative to the carrier and the case under 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, the trigger button being disposed at a proximal end of the auto-injector, a distal part of the carrier surrounding a barrel of the syringe, the two axially-extending beams being disposed between two axial ends of the compression drive spring, and the two axially-extending beams having a ramped portion;
rotating a cylindrical collar relative to the case about a longitudinal axis of the case while a distal end of a second spring is in direct engagement with the cylindrical collar, a diameter of the second spring being larger than a diameter of the compression drive spring;
after rotating the cylindrical collar relative to the case, limiting a re-use of the auto-injector by limiting a movement of the first part relative to the carrier and the case;
generating an audible or tactile feedback to indicate a status of the auto-injector; and
viewing a portion of the plunger from the exterior of the case through the transparent portion of the case.