US 12,447,279 B2
Drug delivery device and method for determining a dose
Michael Jugl, Frankfurt am Main (DE); and Stefan Blancke, Frankfurt am Main (DE)
Assigned to Sanofi, Paris (FR)
Appl. No. 17/928,107
Filed by Sanofi, Paris (FR)
PCT Filed Jun. 8, 2021, PCT No. PCT/EP2021/065202
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2021/249962, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 20315298 (EP), filed on Jun. 9, 2020.
Prior Publication US 2023/0293822 A1, Sep. 21, 2023
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/31551 (2013.01) [A61M 2205/50 (2013.01); A61M 2205/587 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A drug delivery device comprising,
a dose setting and/or drive mechanism comprising a stationary housing having at least one internal groove on an inner surface;
a driver positioned within the housing which is moveable relative to the housing during dose dialing and which is moveable relative to the housing during dose dispensing;
at least one flexible tab that is biased to engage the at least one internal groove such that the at least one flexible tab repeatedly engages and disengages the at least one internal groove during dose dialing, thereby performing an oscillating movement between two positions comprising a first position in which the at least one flexible tab engages the at least one internal groove and a second position in which the at least one flexible tab is disengaged from the at least one internal groove;
a blocking member slidably positioned inside the driver that locks the at least one flexible tab into the at least one internal groove during dose dispensing such that the driver follows the path of the at least one internal groove; and
at least one micro-electro-mechanical system comprising at least one sensor configured and arranged to detect the oscillating movement of the at least one flexible tab during dose dialing.