Assembly for a drug delivery device and drug delivery device

US10065000B2 · kind B2 · utility

Assignee

• Sanofi-Aventis Deutschland GMBH · DE

Inventors

• Michael Helmer · Frankfurt am Main, DE
• Christian Dexheimer · Gerolzhofen, DE
• Winfried Huthmacher · Frankfurt am Main, DE
• Christoph Eissengarthen · Nackenheim, DE
• Carsten Mosebach · Frankfurt am Main, DE

Key dates

• Filing date: Apr 17, 2013
• Grant date: Sep 4, 2018
• Expiry date: Dec 28, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/581
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An assembly for a drug delivery device is provided, the assembly including a blocking element and a piston rod having an interaction feature adapted and arranged to mechanically cooperate with the blocking element. For delivering a dose of a drug, the piston rod is configured to be moved from an initial position to an end position with respect to the blocking element, wherein the interaction feature is provided along the path between the initial position and the end position. An operating noise is provided to the user when the interaction feature mechanically cooperates with the blocking element while moving the piston rod for dose delivery. The interaction feature is adapted for homogenizing the operating noise so as to prevent the operating noise from being interpreted by the user as signalling the end of the dose delivery operation. Furthermore, a drug delivery device is provided.