Needleless syringe with prefilled cartridge
US6383168B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In accordance with an embodiment of the invention, a needleless injection apparatus includes a cartridge having a plunger disposed at a rearward end. The cartridge includes an inner portion with a throat at a forward portion and a displaceable outlet valve initially disposed within the cartridge throat. The cartridge further includes a generally outwardly facing surface and a system for selectively providing driving force to drive the plunger in a forward direction. The apparatus also includes a nozzle for receiving the cartridge, the nozzle defining a rearward, cartridge-receiving portion, and having a forward portion terminating in and defining a valve abutment surface with a plurality of channels and an injection orifice. The forward portion of the nozzle being configured to receive the valve when the valve is displaced to a forwardly disposed position such that the valve is disposed against the valve abutment surface, and so that the inner portion of the cartridge has fluid access to the orifice via the channels. The nozzle further includes a generally inwardly facing surface that abuts the cartridge surface, and a seal disposed between the outwardly facing surface of the cartr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.