Patent ID: 8870821

Claim:
A system for delivering an injection into tissue, the system comprising: a body having an exterior surface, the body containing a first chamber and a second chamber; the first chamber comprising a needle affixed to a first piston, where the needle and first piston are slidably located in the first chamber where the needle is configured to be slidable upon movement by the piston; the second chamber containing a therapeutic substance, where the therapeutic substance is in fluid communication with the needle; a first port in fluid communication with the first chamber and second chamber, where a body of the first piston blocks the first port; a pressure generating compound located within at least the first chamber, such that upon generating pressure, the pressure drives the first piston to cause movement of the needle so that the needle is advanced out of the body and into tissue and subsequently causes movement of the therapeutic substance through the needle; and an adhesive located on the exterior surface.