Prefilled ampoule-syringe of unitary dose
US4610669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1985 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Jan 15, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/5086
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prefilled ampoule-syringe of unitary dose comprises an ampoule being closed at one of its ends, the other end being open. The ampoule further comprises a narrowed zone. A hollow capsule is arranged at top of the opening of the ampoule. This capsule is connected to a movable stopper means comprising a stopper head and a hollow cylindrical member having a radial channel and a peripheral rim. This rim acts as a retention member during the storage and as a piston ring during the injection. In order to avoid the loss of its elasticity, the rim is located within a belt of enlarged diameter downstream from the narrowed zone during the storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.