Drive mechanisms suitable for use in drug delivery devices
US7918832B2 · kind B2 · utility
60Cited by
124References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Apr 8, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31575
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drive mechanism for use in a drug delivery device comprising an epicyclic gearbox. This drive mechanism includes a housing having a helical thread; a piston rod having a non-circular cross section and an external helical thread; a dose dial sleeve, which is threadedly engaged with the housing and being rotatable with respect to the housing; and a drive sleeve, located between the housing and the piston rod, which is threadedly engaged with the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.