Patent · US Active

Drive mechanism of a drug delivery device

US10478562B2 · kind B2 · utility

0Cited by

4References

20Claims

0Family size

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	Nov 19, 2019
Priority date	—
Expiry date	Feb 27, 2036

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2005/3126
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A drive mechanism of a drug delivery device for setting and dispensing of a dose of a medicament includes a housing, a piston rod, a dose indicating member with a dose size information thereon, and a drive wheel. The piston rod engages with a piston of a cartridge for displacing the piston in a distal direction. The dose indicating member is connected to a spring element and is rotatable in a dose incrementing direction against the action of the spring element for setting a dose. The drive wheel is operably engaged with the piston rod for displacing the piston rod in the distal direction for dose dispensing. The dose indicating member is engageable with the drive wheel during dose dispensing to transfer a force to the drive wheel when driven by the relaxing spring element in a dose decrementing direction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.