Wet/dry automatic injector assembly
US6770052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2001 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Dec 18, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention is directed to an automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof. The automatic injection device includes a housing assembly having an interior chamber, a filter assembly, an activation assembly and a needle assembly. In accordance with the present invention, the interior chamber may include a dry compartment for storing a predetermined dry charge of dry medicament therein, and a wet compartment for storing a predetermined amount of liquid injection solution therein. The filter assembly enhances the laminar flow of fluid between the wet compartment to the dry compartment prior to the pressurization of the liquid injection solution within the wet compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.