Assembly for a drug delivery device

US10537684B2 · kind B2 · utility

Assignee

• Sanofi-Aventis Deutschland GMBH · DE

Inventors

• Stefan Blancke · Frankfurt am Main, DE
• Axel Teucher · Frankfurt am Main, DE
• Michael Jugl · Frankfurt am Main, DE
• Christiane Schneider · Frankfurt am Main, DE

Key dates

• Filing date: Nov 17, 2014
• Grant date: Jan 21, 2020
• Expiry date: Jun 27, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2005/3126
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An assembly for a drug delivery device is presented. The assembly comprises a housing and a piston rod having a longitudinal axis, a distal end and a proximal end. The piston rod further comprises a piston rod interaction feature, and a piston rod guide being movable with respect to the piston rod, the piston rod guide further comprising a guide interaction feature corresponding to the piston rod interaction feature, the piston rod guide being movable with respect to the piston rod to switch between a first state and a second state of the assembly, the second state being different from the first state. The assembly is configured such that, in a first state of the assembly, the piston rod guide is in a first axial position relative to the piston rod in which the piston rod interaction feature is arranged to interact with the guide interaction feature to prevent proximal movement of the piston rod with respect to the housing, and wherein, in a second state of the assembly being different from the first state, the piston rod guide is in a second axial position relative to the piston rod, the second axial position being different from the first axial position, wherein, in the second ax…