Non reusable disposable capsule containing an individual vaccine dose to be hypodermically injected with a pressure needleless injection apparatus

A disposable capsule, for a needleless hypodermic injection device, comprising:

• a hollow body having a front end closed by a top wall, and a open rear end said top wall is attached to the body and has a center portion having a smaller thickness than the remaining portion of the top wall so that it can be easily ruptured, and said body is connectable to said hypodermic injection device so that a piston in the injection device can move within the body;
• a nozzle, attached to the front end of the body, having a minute front orifice through which a liquid to be injected can be expelled in the form of a jet;
• and
• a sealing disc positioned within the body at the rear end so as to prevent a liquid within the body from leaking out the rear end, said disc is moveable from a first position at the rear end of the body to a second position at the front end of the body so that the top wall can be ruptured and the liquid to be injected expelled out said orifice, said disc moves when engaged by the piston as the piston moves through the body towards the front end.

A disposable capsule, for needleless hypodermic injection device, comprising:

• a hollow body having a front end closed by a top wall, and a rear end that is closed by a bottom wall that is attached to the body by an outwardly extending flange having a smaller thickness than a remaining portion of the bottom wall, said top wall is attached to the body and has a center portion having a smaller thickness than the remaining portion of the top wall so that it can be easily ruptured, and said body is connectable to said hypodermic injection device so that a piston in the injection device can engage the bottom wall and detach said flange from the body;
• a nozzle, attached to the front end of the body, having a minute front orifice through which a liquid to be injected can be expelled in the form of a jet;
• and
• a sealing disc positioned within the body at the rear end so as to prevent a liquid within the body from leaking out the rear end, said disc is movable from a first position at the rear end of the body to a second position at the front end of the body so that the top wall can be ruptured and the liquid to be injected expelled out said orifice, said disc moves when said piston detaches the flange and moves the bottom wall toward the front end.