Manifold for a two barrel syringe

Manifold for a two-barrel pen syringe for administering two different kinds of medicine, said syringe having two parallel cartridges each containing a different kind of medicine and each sealed at their outlet end with a rubber membrane, said manifold comprising:

• a molded plastic body;
• a mixing chamber being formed as a cavity within said plastic body;
• a first, second and third needle each having two ends, a first sharp end and a second end opening into said mixing chamber;
• said mixing chamber being open at one end thereof for one end of said first and second needles, the other end of the mixing chamber being closed by a membrane through which one end of said third needle must pass to open into said cavity;
• said first and second needles being embedded in said molded plastic body and having said first sharp ends project from one side of said molded plastic body with a spacing bringing them in a position to pierce rubber membranes of cartridges in a syringe when the manifold is mounted thereon;
• and
• said third needle having its first sharp end project outside of said molded plastic body from a side opposite the sharp ends of said first and second needles.