US 12,420,023 B2
Drug delivery device with feedback mechanism
Thomas Mark Kemp, Ashwell (GB); and Hugo Revellat, Royston (GB)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by SANOFI-AVENTIS DEUTSCHLAND GMBH, Frankfurt am Main (DE)
Filed on Jan. 17, 2025, as Appl. No. 19/028,589.
Application 19/028,589 is a continuation of application No. 18/968,712, filed on Dec. 4, 2024.
Application 18/968,712 is a continuation of application No. 17/172,602, filed on Feb. 10, 2021, granted, now 12,186,540, issued on Jan. 7, 2025.
Application 17/172,602 is a continuation of application No. 15/578,668, granted, now 10,940,270, issued on Mar. 9, 2021, previously published as PCT/EP2016/062455, filed on Jun. 2, 2016.
Claims priority of application No. 15170590 (EP), filed on Jun. 3, 2015.
Prior Publication US 2025/0170338 A1, May 29, 2025
Int. Cl. A61M 5/315 (2006.01); A61M 5/20 (2006.01); A61M 5/32 (2006.01)
CPC A61M 5/3157 (2013.01) [A61M 5/2033 (2013.01); A61M 5/3245 (2013.01); A61M 2005/208 (2013.01); A61M 2005/3247 (2013.01); A61M 2005/3267 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An autoinjector comprising:
a case adapted to receive at least a portion of a medicament container;
a plunger movable relative to the case along a longitudinal axis of the autoinjector between an initial position and a drug delivery position for delivering a medicament from the medicament container;
an inner sleeve configured to engage a proximal end of the plunger when the plunger is in the initial position, the inner sleeve comprising a tubular body and a flexible arm movable relative to the tubular body, the flexible arm comprising a first end coupled to the tubular body, a second end spaced from the tubular body, and a projection extending from the second end, wherein the flexible arm is movable between an inwardly deflected position and a relaxed position; and
an outer sleeve comprising a body having a first end, a second end, and an interior surface defining a cylindrical cavity, the body of the outer sleeve comprising an opening radially extending through the body of the outer sleeve and longitudinally extending between the first end and the second end, wherein the opening is sized to receive the projection of the flexible arm,
wherein the autoinjector is configured such that after the plunger moves into the drug delivery position, the inner sleeve moves axially relative to the outer sleeve and into the cylindrical cavity of the outer sleeve, allowing the projection of the flexible arm to engage the interior surface of the outer sleeve and deflecting the flexible arm inwardly, and
wherein the autoinjector is configured such that an audible signal or a tactile signal is generated by the inner sleeve to indicate completion of dispensing of the medicament.