Drug delivery device with slim drive mechanism
US11458251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2016 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Oct 7, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2411
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery device comprises a housing (201) and an expelling assembly with a piston rod (220), a drive tube (260) with an outer surface and a scale drum (270) arranged between the drive tube and the housing, the scale drum being coupled to the housing and the drive tube outer surface. The device further comprises a drive spring (255) arranged between the housing and the drive tube, and setting means (280) allowing a user to simultaneously set a dose amount to be expelled and strain the drive spring correspondingly by rotation of the drive tube. The scale drum is coupled to the drive tube via a spline connection, wherein the drive spring is arranged proximally of the spline connection when the spline connection is in its proximal-most position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.