US Patent 11534543 Method for making patch-sized fluid delivery systems

A method for making a fluid delivery device including a reusable portion and a disposable portion. The disposable portion is adapted to be secured to a user and includes a conduit fluidly connecting a reservoir containing a fluid and a moveable pumping member. The moveable pumping member can expand an expandable structure with the fluid. The reusable portion is selectively engageable to the disposable portion and contains a drive device for engaging the moveable pumping member of the disposable portion. The drive device has a rotatable pumping actuation member with a plurality of projections for engaging the moveable pumping member and thereby moving the fluid to expand the expandable structure.