Automatic injector
US4820286A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | May 12, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3132
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to an automatic injector for injecting one or more injection liquids, comprising an assembly of a discharge mechanism, a cartridge in a cartridge holder, and an outer sleeve which is telescopically slidable around the cartridge holder, which cartridge comprises a barrel, in the barrel a piston and a number of separating stoppers equal to one less than the number of injection liquids, a needle holder with injection needle and optionally a by-pass for injection liquid. The injector is suitable for accommodating a solid and a solvent therefor, and for that purpose comprises a passable stopper between solid and solvent and a solvent by-pass in the barrel wall or in the passable stopper, in which, by a single or repeated operation of telescoping external parts of the injector solvent can pass the passable stopper and can reach the solid, as a result of which the injector can be made ready for use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.