Device for conditioning liquids or liquid and solid substances
US4941876A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1987 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Dec 10, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M11/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The device comprises a cylindrical ampoule which is closed at one end and opened at the other end. The ampoule has a relatively large circular cylindrical zone adjacent the closed end and a relatively small cylindrical zone disposed between the relatively large cylindrical zone and the open end of the ampoule. A piston valve engages the open end of the ampoule to provide sealing engagement and dispensing of the liquid contents when desired. An intermediary stopper engages the relatively small cylindrical zone, when the stopper is in a storage position, to divide the ampoule into first and second storage compartments. The stopper is shaped to provide tight sealing engagement with the relatively small circular cylindrical zone while providing at least one opening, between its lateral surface and the interior wall of the ampoule, for allowing passage and mixing the substances contained in the compartments, when it is positioned in the relatively large circular cylindrical zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.