Needleless injection device with sliding membrane
US10653839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2018 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Jan 18, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2073
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure concerns a needleless injection device including a body forming a housing, a gas generator, a tubular reservoir which contains an active ingredient to be injected, and a generally T-shaped elastically deformable membrane. The membrane includes a tubular portion which extends axially in the reservoir and is designed to lie axially in the reservoir under the effect of the pressure generated by the gas generator. A nozzle for injecting the active ingredient is arranged at the lower end of the reservoir. The device further includes a sock which wraps the tubular portion of the membrane, at least partially. The sock is adapted to limit the friction between the tubular portion of the membrane and the reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.