Feedback Mechanism for an Injection Device
AssigneeSanofi-Aventis Deutschland GmbH
InventorsMarc Schader, Michael Kneip, Matthias Rau
Life of this patent
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Abstract
A feedback mechanism for an injection device that is configured to deliver a medicament to a user is described. The feedback mechanism comprises a piston and a fluid chamber, and the piston is adapted to move into the fluid chamber during use of the injection device. The feedback mechanism also has a damper that is arranged to damp movement of the piston, and an indicator that is arranged to provide feedback to the user after the piston has moved a pre-determined distance into the fluid chamber.
Claims21
1-19. (canceled)
A feedback mechanism for an injection device, the injection device configured to deliver a medicament to a user, the feedback mechanism comprising:
- a piston;
- a fluid chamber, wherein the piston is configured to move into the fluid chamber during use of the injection device;
- a damper configured to damp movement of the piston;
- and
- an indicator configured to provide feedback to the user after the piston has moved a predetermined distance into the fluid chamber.
An injection device comprising:
- a medicament delivery mechanism comprising:
- a reservoir;
- and
- a plunger that moves to displace medicament from the reservoir for delivery to a user during use of the injection device;
- and
- a feedback mechanism comprising:
- a piston;
- a fluid chamber, wherein the piston is configured to move into the fluid chamber during use of the injection device;
- a damper configured to damp movement of the piston;
- and
- an indicator configured to provide feedback to the user after the piston has moved a predetermined distance into the fluid chamber.
A method of using an injection device, the method comprising:
- delivering a medicament to a user;
- moving a piston into a fluid chamber;
- damping the movement of the piston;
- and
- providing feedback to the user after the piston has moved a predetermined distance into the fluid chamber.
Dependencies are inferred from the claim text.