Automatic drug injection device with sophisticated drive mechanism

US10149947B2 · kind B2 · utility

Assignee

• Sanofi · FR

Inventors

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

Key dates

• Filing date: Apr 8, 2014
• Grant date: Dec 11, 2018
• Expiry date: Dec 25, 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 setting and dispensing of a dose of a medicament includes a 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 spindle operably engageable with the piston rod during dose dispensing and a drive member axially displaceable relative to the drive spindle against the action of a spring element during dose setting and being threadedly engaged with the drive spindle to form a spindle gear.