Drive mechanism for a medication delivery device and medication delivery device

US9089652B2 · kind B2 · utility

Assignee

• Sanofi-Aventis Deutschland GMBH · DE

Inventors

• Philippe Nzike · Frankfurt am Main, DE
• Steffen Raab · Frankfurt am Main, DE
• Ulrich Bruggemann · Frankfurt am Main, DE
• Uwe Dasbach · Frankfurt am Main, DE
• Uwe Boeser · Frankfurt am Main, DE

Key dates

• Filing date: Dec 9, 2009
• Grant date: Jul 28, 2015
• Expiry date: Oct 18, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/18696
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A drive mechanism for a medication delivery device (1) is proposed, the drive mechanism comprising a housing (13, 17, 40) having a proximal end and a distal end, a rotation member (21) which is adapted to be rotated in a first direction with respect to the housing during setting of a dose of a medication and to be rotated in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction, a piston rod (12) which is adapted to be displaced in a distal direction with respect to the housing for delivering the dose, a drive member (20) which follows rotational movement of the rotation member in the second direction during delivery of the dose, and a stop member (26) which prevents rotational movement of the drive member with respect to the housing in the first direction during setting of the dose, wherein the rotational movement of the drive member in the second direction is converted into movement of the piston rod in the distal direction with respect to the housing. Furthermore, a medication delivery device is provided for.