Drive mechanism of a drug delivery device

US9861758B2 · kind B2 · utility

Assignee

• Sanofi · FR

Inventors

• Stefan Bayer · Würselen, DE
• Daniel Berning · Baesweiler, DE
• Philippe Blank · Düsseldorf, DE
• Wolfgang Pelzer · Kreuzau, DE
• Michael Pfoser · Würselen, DE
• Björn Wilden · Simmerath, DE

Key dates

• Filing date: Apr 8, 2014
• Grant date: Jan 9, 2018
• Expiry date: Sep 5, 2034

Classification

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

Abstract

A drug delivery device for dispensing a dose of a medicament includes an elongated housing extending in an axial direction, and a piston rod to operably engage with a piston of a cartridge to displace the piston in a distal axial direction. The drug delivery device further includes a drive sleeve extending in an axial direction and being rotatable against the action of a spring during a dose setting procedure and a dispensing sleeve rotatably engaged with the piston rod and being displaceable in an axial direction relative to the drive sleeve to engage with the drive sleeve in a torque transmissive way during a dose dispensing procedure.