Patent ID: 8414541
Filing Date: 2013-04-09
Classification: A61M

Abstract:
1. An actuating mechanism for a hypodermic syringe of a cartridge type, which actuating mechanism includes axially extending chamber to receive a cartridge containing injectant, a plunger operable at a rearward end of the actuating mechanism to drive a slidable bung of said cartridge in the chamber axially forwards into the cartridge and dispel the injectant therefrom, a hub at a forward end of the actuating mechanism to mount a hypodermic needle and a socket extending rearwardly from the hub to receive a forward end of the cartridge in use, wherein: the cartridge is rigid relative to the chamber; the chamber is at least in part flexible relative to the cartridge so that it can be deformed to admit the cartridge; the cartridge and the chamber are relatively configured and arranged so that in use the cartridge cannot move in the chamber and therein its being rigid relative to the chamber resists flexing of the chamber; and wherein the chamber includes at least one tongue extending axially along a side of the chamber, which tongue is flexible relative to the cartridge and resiliently deformable sideways to admit the cartridge into the chamber and thereafter engages the cartridge so as to position the cartridge in the chamber in use.