Single use disposable jet injector
US6682504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2001 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/778
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A jet injector having cartridge and power pack assemblies is disclosed. In one embodiment, the cartridge assembly includes a tube containing the medicament with a plunger at one end and a stopper at the other end. The plunger is movable within the tube lumen to force the stopper against a needle, thereby creating a fluid pathway through the stopper. In another embodiment, only the plunger is movable within the tube lumen and the stopper, which can be integral to the rest of the cartridge assembly or a separate component, already has a pathway for ejection of the medicament. The present invention also relates to an energy mechanism for the power pack assembly that is a gas spring containing a charging material existing in liquid and gaseous phase equilibrium within the gas spring to maintain a substantially constant pressure prior to activation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.