Double-seal stopper for parenteral bottle

Claim 1

An infusion closure for use with a parenteral liquid-containing vial to hermetically seal said vial and to provide access for infusion of the liquid to a patient, said vial having a neck terminating in a transverse end surface, said infusion closure comprising the combination of an elastomeric stopper and an infusion spike inserted into said stopper, said stopper having a disk-shaped head and an annular skirt integral with said disk-shaped head, said annular skirt projecting into said liquid-containing vial, said disk-shaped head having a flange extending laterally outward from said skirt covering said transverse end surface of said vial neck, a target area centrally located in said disk-shaped head through which said infusion spike is inserted into said vial forming a first seal with said infusion spike and having ruptured edges oriented toward said liquid, said skirt having a generally cylindrical opening defined by a transverse web on the top of said opening corresponding to said target area, an annular protuberance, spaced downward from said transverse web and integral therewith, laterally extending into said opening and being elongated longitudinally toward said liquid in said vial and forming a second seal with said infusion spike, an annular recess between said transverse web and said annular protuberance designed to serve as space to accommodate said ruptured edges formed by said infusion spike upon its insertion through said target area, a cylindrical wall surface, having a top edge, spaced downward from said annular protuberance and integral therewith, to guide and grip said infusion spike, an annular recess, between said annular protuberance and said top edge of said cylindrical wall surface, designed to serve as space into which said annular protuberance extends upon insertion of the infusion spike, said infusion spike having a cylindrical shaft having a tapered end terminating in a sharp tip, an upper body having two parts both integral with said cylindrical shaft, a first channel, extending from said tip upward through said shaft and through one part of said upper body, adapted to remove said liquid from said vial, and a second channel extending from said tip upward through said shaft and through the other part of said upper body to allow air to enter into said vial to equilibrate pressure within said vial when said liquid is being removed from said vial by infusion to a patient.