초록 ▼

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

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.

대표청구항 ▼

An automatic injector for injecting one or more injection liquids, in which, prior to use, different substances which are not allowed to be in contact with each other for a long period of time can be stored separately comprising an assembly of a discharge mechanism, a cartridge in a cartridge holder

An automatic injector for injecting one or more injection liquids, in which, prior to use, different substances which are not allowed to be in contact with each other for a long period of time can be stored separately 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, the cartridge comprising: a hollow, substantially cylindrical barrel which is open at its rear end, a piston which is movable in the barrel and seals same, a number of separating stoppers equal to one less than the number of injection liquids, said separating stoppers being movable in the barrel and having circumferences that adjoin the inner wall of the barrel in a sealing manner, thereby keeping the injection liquids in the barrel separated from each other prior to use of the injector, a needle holder connected to the front end of the barrel in a sealing manner and comprising a neck for sealingly gripping a needle, which injector is characterized in that one of the substances in the injector is solid and can be injected as an injection liquid after dissolving in a solvent, the discharge mechanism is in operative relationship with the piston via a plunger and its capable of telescoping movement relative to the cartridge holder, permitting the injector to be made ready for use by a single or repeated forward movement of the piston in the barrel, prior to using the injector, the cartridge at its front end is provided with a sealing means to prevent injection liquid from leaving the injector via the needle during making the injector ready for use, a passable stopper, movably provided in the barrel in front of the piston and which, prior to making the injector ready for use, adjoins the inner wall of the barrel in a circumferentially sealing manner and keeps the solid separated from the solvent, and a solvent by-pass for liquid is situated in the barrel wall over a length slightly exceeding the length of the passable stopper, said solvent by-pass permitting the solvent to pass the passable stopper and reach the solid in front of said stopper and dissolve same upon making the injector ready for use.