US 12,303,672 B1
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. 19/028,890.
Application 19/028,890 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.
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 plunger movable along a longitudinal axis of the autoinjector in a distal direction between a first plunger position and a drug delivery position to deliver a medicament from a syringe of the autoinjector;
an inner sleeve comprising an inner sleeve body;
a flexible arm extending from the inner sleeve body, wherein the flexible arm is movable relative to the inner sleeve body between an inwardly deflected position and a relaxed position, wherein a portion of the flexible arm extends outwardly relative to the inner sleeve body in the relaxed position;
an outer sleeve disposed at a proximal portion of the autoinjector, the outer sleeve comprising an outer sleeve body having an opening radially extending through the outer sleeve body, wherein the opening is sized to receive the portion of the flexible arm when the flexible arm is in the relaxed position;
a release member configured to move from (a) a first position in which a proximal end of the inner sleeve engages a latch on a proximal end of the plunger to hold the plunger in the first plunger position, toward the outer sleeve to (b) a second position in which the inner sleeve has disengaged from the latch of the plunger to allow the plunger to move in the distal direction from a second position to the drug delivery position; and
a control spring movable between a compressed state and an expanded state, wherein the control spring is configured to transition to the expanded state after the plunger moves to the drug delivery position,
wherein the autoinjector is configured such that as the control spring transitions to the expanded state, the inner sleeve is configured to move within the outer sleeve to allow the flexible arm to
(i) engage the outer sleeve with the portion of the flexible arm,
(ii) inwardly deflect from the relaxed position to the inwardly deflected position, and
(iii) remain in the inwardly deflected position until the portion of the flexible arm disengages from the outer sleeve and the flexible arm moves into the relaxed position,
wherein the inner sleeve is configured to generate an audible signal or a tactile signal to indicate completion of dispensing of the medicament when the flexible arm meets the outer sleeve.