Needleless syringe provided with an ejection tube with a constant cross-section
US6837866B1 · kind B1 · utility
15Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2000 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Mar 11, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/3145
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a needless syringe (1), comprising in succession, a gas generator (2), a gas expansion chamber (3) and a means for retaining the particles of an active agent, comprising at least one lid (8) which breaks under the influence of the gas coming from the generator (2). The main characteristic of the inventive syringe (1) is that the tube (6) has a cylindrical upstream part in which the means retaining the particles are fixed, said upstream part having a substantially constant cross-section over a length that is more than twice its inner diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.