Needleless syringe with temporarily retained thrusting means
US6666843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jul 24, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/2425
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns the field of needless syringe for injecting liquid active principle for therapeutic purposes. It concerns a syringe wherein the active principle (1, 10) is initially placed between an injector (2, 22) comprising at least an injection duct (3, 23) contacted with the skin and a mobile wall (4, 24) separated from thrusting means (5, 25) displaced by gases of propellant generator (7, 27) pressurising and expelling the active principle. Said syringe aims at quickly providing a high expelling speed of the liquid to efficiently perforate the skin and improve bioavailability. Said syringe is characterised in that said thrusting means (5, 25) comprising temporary retention device (6, 26) deactivated by the operation of the propellant generator (7, 27).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.