Portable and wearable injector of mini size

Claim 1

A portable and wearable medical injector of mini size, which comprises an injector syringe and a gas-impermeable flexible bag received in the syringe, said syringe having one open end for injection of an infusion liquid, the other end being sealed, said bag containing therein a gas generating means comprising a chemical substance which is non-toxic to human beings and reactive with hydrogen peroxide, said bag prior to administration of infusion liquid being provided with a predetermined amount of hydrogen peroxide for reaction with the said chemical substance in the bag to produce an oxygen gas in the flexible bag for expanding the bag in the syringe to force the infusion liquid in predetermined quantities and rates over predetermined periods of time out of said open end of the syringe, said syringe being provided with a slidable element which seals its said other end, said slidable element having an extension at its bottom engageable by a tool for pulling the sealing element downwardly for filling the syringe with infusion liquid after mixture of said chemical substance with said hydrogen peroxide.