Patent ID: 11865315
Assignee: SANOFI-AVENTIS DEUTSCHLAND GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A feedback mechanism for an injection device, the injection device configured to deliver a medicament to a user, the feedback mechanism comprising:
an actuator;
a fluid chamber having a restricted outlet, wherein the actuator is configured to urge fluid from the fluid chamber through the restricted outlet, and wherein the actuator is moveable relative to the fluid chamber between a first position and a second position, and wherein the restricted outlet comprises a restriction that slows fluid passage through the restricted outlet such that the fluid flows within the restricted outlet at a reduced flow rate; and
an indicator configured to provide feedback to the user after a predetermined volume of fluid has passed from the fluid chamber through the restricted outlet during use of the injection device;
wherein the indicator comprises a membrane configured to be inflated by fluid passing through the restricted outlet.