Controlled dropper tip closure

Claim 1

A unitary closure assembly comprising: (a) a cap body having upper and lower portions, said upper portion comprising a circular peripheral base surface and a substantially conical drop dispensing tip projecting from said base and having an apex, said drop dispensing tip having an opening at the apex thereof and a ringed protrusion disposed around the base of said tip; said lower portion of said cap body adapted to be secured to an opening in a container; (b) a lid secured to said cap body by a hinge, said lid having an inner side and an outer side, and comprising a circular peripheral base portion and a substantially conical raised portion projecting from said base portion and having an apex, said raised portion adapted to enclose and cover said drop dispensing tip on said cap body; said lid having a raised ring disposed on said inner side around the apex of said raised portion, said raised ring adapted to surround and seal said drop dispensing tip opening; and said lid having a ringed depression in said inner side of said raised portion, proximate said base portion, adapted to mate with said ringed protrusion on said drop dispensing tip and to retain said raised ring in sealing engagement with said tip; (C) said hinge comprising two side connectors, each secured to said cap body and lid, and a central resilient member also secured to said cap body and lid having a predetermined shape, and being deformed when said lid is in a position intermediate a fully opened or fully closed position.