US 12,268,853 B2
Drug delivery device with drive sub-assembly
Marc Schader, Frankfurt am Main (DE); Michael Mayer, Frankfurt am Main (DE); Jim Bradford, Cambridgeshire (GB); William Timmis, Cambridgeshire (GB); Thomas Mark Kemp, Cambridgeshire (GB); and Hugo Revellat, Cambridgeshire (GB)
Assigned to Sanofi, Paris (FR)
Appl. No. 16/960,249
Filed by Sanofi, Paris (FR)
PCT Filed Nov. 1, 2018, PCT No. PCT/EP2018/079938
§ 371(c)(1), (2) Date Jul. 6, 2020,
PCT Pub. No. WO2019/086576, PCT Pub. Date May 9, 2019.
Claims priority of application No. 17306524 (EP), filed on Nov. 3, 2017.
Prior Publication US 2021/0069420 A1, Mar. 11, 2021
Int. Cl. A61M 5/315 (2006.01); A61M 5/20 (2006.01); A61M 5/31 (2006.01); A61M 5/32 (2006.01)
CPC A61M 5/3157 (2013.01) [A61M 5/2033 (2013.01); A61M 5/3146 (2013.01); A61M 5/31511 (2013.01); A61M 5/31583 (2013.01); A61M 5/3202 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A drug delivery device comprising:
a drive subassembly comprising a housing and a plunger, wherein the plunger is adapted to be rotated between a locked position, in which the plunger is prevented from advancing, and a released position, in which the plunger is advanceable,
at least one restraining component adapted to restrain rotation of the plunger from the locked position towards the released position, and
a control subassembly comprising a distal region of the housing adapted to receive a syringe and a sleeve coupled to the housing to permit movement of the sleeve relative to the housing to release the plunger;
wherein the at least one restraining component comprises a plunger boss on the plunger and an indent in the housing, the plunger boss having a proximal boss protruding in a proximal direction adapted to be received within the indent to restrain rotation of the plunger from the locked position towards the released position.