A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/20 (2006.01) A61M 5/19 (2006.01)
Patent
CA 2092389
ABSTRACT The invention relates to an automatic injector, 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, one of said substances being a solid and another being or comprising a solvent for this solid, which solid can be injected as an injection liquid after dissolving it in said solvent; said injector comprising a discharge mechanism, a cartridge assembly, and a front cover, connected to a front portion of said cartridge assembly and provided at its front with a pierceable central area; said cartridge assembly comprising: - a hollow barrel having a backward portion with a cylindrical inner surface and a front portion, - a pierceable stopper sealingly connected to the front portion of the barrel and constituting a compartment in front of said stopper for accommodating the solid, - a piston slidably accommodated in the backward portion of the barrel and constituting a compartment for liquid in said barrel, - an injection needle longitudinally extending in said liquid compartment, and - a means for centering the distal end of the needle in order to position the needle tip towards the pierceable stopper; said front cover being capable of rotational movement relative to the outer sleeve, which movement causes a backward movement of the barrel in the cartridge container, the piston and the needle bearing thereon remaining in their places, as a result of which the injection needle pierces the pierceable stopper and allows the liquid in the barrel to reach the solid compartment through the needle.
Duphar International Research B.v.
Fetherstonhaugh & Co.
LandOfFree
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