Needleless injection device with a curved membrane
US11738151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2018 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Jan 15, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31513
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A needleless injection device is provided that includes a body forming a housing, a gas generator, a tubular reservoir that contains an active ingredient, and a T-shaped elastically deformable membrane having a tubular portion. The reservoir extends axially in the housing from an upper end to a lower end and the tubular portion is configured to extend and lie axially in the reservoir under an effect of a pressure generated by the gas generator. An injection nozzle is arranged at the lower end of the reservoir. The tubular portion is funnel shaped and includes at least an upper segment that decreases along an axial elongation direction of the member and a lower segment that increases along the axial elongation direction. The axial length of the upper segment is greater than that of the lower segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.