Drive mechanism and drug delivery device herewith
US10918799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2015 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Nov 14, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2207/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure is generally directed to a drive mechanism for use in a drug delivery device having a cylindrical cartridge, i.e. a handheld injection device for selecting and dispensing a number of user variable doses of a medicament. The drive mechanism includes a base element, a toothed piston rod, which is guided within and movable relative to the base element, and a drive gear having a pinion, which is rotatably held in the base element and in meshed engagement with the toothed piston rod. The toothed piston rod includes multiple rigid rod pieces which are connected by hinges. The rigid rod pieces comprise a flat plate provided with a straight toothed rack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.