Drive mechanism for a medicament delivery device
US10420892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Oct 19, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3267
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure relates to a drive mechanism for a medicament delivery device according to the disclosure comprises a compression member comprising a first cavity containing a first volume of fluid, said compression member also comprising a second cavity containing a second volume of fluid; a passage for fluid communication between the first cavity and the second cavity; a first movable piston arranged to seal the first cavity; a second movable piston arranged to seal the second cavity; wherein movement of the first movable piston or of the second movable piston, by an applied force, causes a relative change of volume between the first volume of fluid and the second volume of fluid, via a fluid flow through said passage, such that the respective second movable piston or the first movable piston is also moved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.