Disposable needle-free injection apparatus and method
US6641554B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Oct 29, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
One form of the invention provides a needle-free injection system including the following components: a nozzle portion having a glass wall defining a drug storage space, and an injection wall defining a drug injection space, the injection wall being aligned with the glass wall and defining a plurality of drug bypass conduits disposed adjacent a forward end of the drug injection space; an injection orifice defined at the forward end of the injection space; a drug plunger defining a rearward end of the storage space; a portion of dried drug initially disposed between the storage space and the injection space, and being displaceable into the injection space adjacent the bypass conduits; and a pierceable gas cartridge for providing injection power to the drug plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.