US 11,724,039 B2
Injection device
Stefan Blancke, Frankfurt am Main (DE)
Assigned to Sanofi, Paris (FR)
Appl. No. 16/976,202
Filed by SANOFI, Paris (FR)
PCT Filed Mar. 25, 2019, PCT No. PCT/EP2019/057392
§ 371(c)(1), (2) Date Aug. 27, 2020,
PCT Pub. No. WO2019/185517, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 18305345 (EP), filed on Mar. 28, 2018.
Prior Publication US 2021/0038821 A1, Feb. 11, 2021
Int. Cl. A61M 5/315 (2006.01); A61M 5/24 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/3155 (2013.01) [A61M 5/24 (2013.01); A61M 5/31583 (2013.01); A61M 2005/3126 (2013.01); A61M 2205/0227 (2013.01); A61M 2205/0233 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/50 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An injection device comprising:
a housing with a receptacle for a product;
a dosing mechanism for setting a product dosage to be administered and for displaying the product dosage that has been set, the dosing mechanism comprising:
a dosing sleeve that is rotatable relative to the housing in a first direction for setting the product dosage and that is rotatable relative to the housing in a second direction that is opposite to the first direction for correcting or dispensing the product dosage,
a dispensing mechanism for dispensing the product, the dispensing mechanism comprising a piston rod that is moveable relative to the housing in a dispensing direction in order to eject the product dosage in a dispensing stroke,
at least one sleeve that is rotatable together with the dosing sleeve relative to the housing in the second direction in order to eject the product dosage, and
a clutch interposed between the dosing sleeve and the at least one sleeve and rotatable with the dosing sleeve and/or with the at least one sleeve;
a first detector for detecting movement of the clutch relative to the dosing sleeve and/or to the housing and/or to the at least one sleeve; and
a data processing unit connected to the first detector for reading, storing, processing, transmitting, and/or displaying signals received from the first detector,
wherein the clutch comprises first ratchet teeth for engaging corresponding first teeth of the dosing sleeve such that relative incremental rotation of the dosing sleeve with respect to the clutch in the first direction is permitted while prevented in the second direction and second ratchet teeth for engaging corresponding second teeth of the at least one sleeve such that relative incremental rotation of the clutch with respect to the at least one sleeve in the second direction is permitted while prevented in the first direction.