US 12,434,007 B2
Injection device
Michael Jugl, Frankfurt am Main (DE); Michael Helmer, Frankfurt am Main (DE); Steffen Raab, Frankfurt am Main (DE); and Martin Vitt, Frankfurt am Main (DE)
Assigned to Sanofi, Paris (FR)
Appl. No. 17/421,661
Filed by Sanofi, Paris (FR)
PCT Filed Jan. 17, 2020, PCT No. PCT/EP2020/051122
§ 371(c)(1), (2) Date Jul. 8, 2021,
PCT Pub. No. WO2020/148426, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 19305066 (EP), filed on Jan. 18, 2019.
Prior Publication US 2022/0088313 A1, Mar. 24, 2022
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/3157 (2013.01) [A61M 5/31551 (2013.01); A61M 5/31553 (2013.01); A61M 5/31558 (2013.01); A61M 5/31585 (2013.01); A61M 2205/582 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An injection device for selecting and dispensing a number of user variable doses of a liquid drug or medicament formulation, the injection device comprising:
a housing defining an internal space with an inner surface, the inner surface being provided with a thread feature and multiple distinct ratchet features spread along a helical path;
a dose indicator positioned within the internal space of the housing, the dose indicator having an external surface configured to mesh or engage with the thread feature for restricting a motional freedom of the dose indicator within the housing to follow a helical or screwing movement during a dose dialing and a dose dispensing, the dose indicator further comprising a number of engaging members, at least one of the engaging members being configured to contact the multiple distinct ratchet features in distinct positions during the helical or screwing movement, wherein the distinct positions correspond to a plurality of dosage amounts and the contact is configured to provide a user with a tactile feedback by increasing or decreasing a dwelling torque at each of the distinct positions, and wherein the engaging members are resiliently biased towards a distant position; and
a release mechanism connected to the dose indicator, the release mechanism being configured to, when activated during the dose dispensing, urge the engaging members away from the distant position and against a force of the resilient bias thereby suspending the tactile feedback at least for a subset of the multiple distinct positions.