US 12,329,948 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. 19/028,654.
Application 19/028,654 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 2025/0161577 A1, May 22, 2025
Int. Cl. A61M 5/20 (2006.01); A61M 5/315 (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)] 26 Claims
OG exemplary drawing
 
1. An autoinjector comprising:
a plunger movable along a longitudinal axis of the autoinjector between an initial position and a drug delivery position to deliver a medicament from a syringe of the autoinjector;
a needle coupled to a distal end of the syringe, wherein the needle is movable between a (i) retracted position in which a distal tip of the needle is proximal to a distal end of the autoinjector, and (ii) an injection position in which the distal tip is distal to the distal end 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 a relaxed position and an inwardly deflected position, wherein a portion of the flexible arm extends outwardly relative to the inner sleeve body in the relaxed position;
an outer sleeve comprising an outer sleeve body having a proximal portion, a distal portion, and an opening at the distal portion, wherein the opening is sized to receive the portion of the flexible arm when the flexible arm is in the relaxed position; and
a control spring configured to move the inner sleeve (a) within the outer sleeve and (b) into a post-delivery position,
wherein the autoinjector is configured such that when the inner sleeve moves within the outer sleeve to the post-delivery position, the portion of the flexible arm is configured to engage the outer sleeve, and the flexible arm is configured to
(I) inwardly deflect from the relaxed position into the inwardly deflected position, and
(II) 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 flexible arm impacts the outer sleeve,
wherein the inner sleeve is configured to hold the needle in the retracted position when the inner sleeve is in the post-delivery position; and
wherein the autoinjector is configured such that the outer sleeve and the plunger rotate relative to each other before the plunger is in the drug delivery position.