US 11,813,436 B2
Auto-injector
Matthew Ekman, Cheshire (GB); Yannick Hourmand, Haslingfield (GB); and Timothy Donald Barrow-Williams, St. Albans Herts (GB)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed on May 8, 2023, as Appl. No. 18/144,555.
Application 18/144,555 is a continuation of application No. 17/719,441, filed on Apr. 13, 2022.
Application 17/719,441 is a continuation of application No. 16/809,669, filed on Mar. 5, 2020, granted, now 11,311,671, issued on Apr. 26, 2022.
Application 16/809,669 is a continuation of application No. 15/880,251, filed on Jan. 25, 2018, granted, now 10,603,436, issued on Mar. 31, 2020.
Application 15/880,251 is a continuation of application No. 15/165,720, filed on May 26, 2016, granted, now 9,931,471, issued on Apr. 3, 2018.
Application 15/165,720 is a continuation of application No. 13/806,324, granted, now 9,352,088, issued on May 31, 2016, previously published as PCT/EP2011/060726, filed on Jun. 27, 2011.
Claims priority of application No. 10167506 (EP), filed on Jun. 28, 2010.
Prior Publication US 2023/0270944 A1, Aug. 31, 2023
Int. Cl. A61M 5/20 (2006.01); A61M 5/32 (2006.01)
CPC A61M 5/2033 (2013.01) [A61M 5/3202 (2013.01); A61M 5/3257 (2013.01); A61M 2005/206 (2013.01); A61M 2005/208 (2013.01)] 30 Claims
OG exemplary drawing
 
16. An auto-injector comprising:
a housing having at least one viewing window for viewing a syringe disposed within the housing; and
a first part movably disposed relative to the housing and comprising a first surface and a second surface axially spaced apart from each other;
a second part slidably disposed relative to the first part and comprising
a first proximally-extending resilient arm with an outward protrusion configured to engage the first surface of the first part such that movement of the first part causes movement of the second part,
a first ramped portion configured to engage the second surface of the first part to cause inward deflection of the first proximally-extending resilient arm when the first ramped portion and the second surface move axially relative to each other, and
a second portion configured to engage a second resilient arm of the auto-injector such that the second resilient arm outwardly deflects relative to the second part to release a plunger rod of the auto-injector from being held in a distal position within the housing such that the plunger rod moves proximally relative to the housing under a proximally-directed biasing force of a drive spring of the auto-injector to dispense the medicament from the syringe.