Needless syringe provided with a piezoelectric triggering system
US6610028B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2002 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Feb 4, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2013
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns the technical field of needleless syringes for injecting an active principle through the skin. More particularly, the invention concerns a needleless syringe provided with a piezoelectric crystal and a triggering device comprising a triggering member and impacting means and, on a triggering device particularly adapted to needleless syringes. The invention is mainly characterized in that the impacting means comprises a latch maintained under elastic stress by being blocked against a stop element and the triggering member is capable of moving the latch to release it, so that it is urged to strike the piezoelectric crystal. Then, the crystal produces an electric arc designed to initiate a pyrotechnic charge whereof the combustion gases will help to expel the active principle contained in the syringe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.