EP0245895A1 — Automatic injector

USPTO Abstract

The invention relates to an automatic injector for injecting one or more injection liquids, comprising an assembly of a discharge mechanism, a cartridge (12) in a cartridge holder (13), and an outer sleeve (11) which is telescopically slidable around the cartridge holder (13), which cartridge comprises a barrel (14), in the barrel a piston (15) and a number of separating stoppers (30-32) equal to one less than the number of injection liquids, a needle holder (16) with injection needle (17) 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 (31) between solid and solvent and a solvent by-pass (47) 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.