Patent ID: 8820591

Claim:
A closure assembly for a container comprising: a housing having a first annular wall and a second annular wall disposed within the first annular wall defining an annular chamber therebetween, an inner surface of the second annular wall defining a fluid passage having a fluid inlet and a fluid outlet, the inner surface of the second annular wall having a retaining ring receiving surface, and a first valve receiving surface spaced axially from the retaining ring receiving surface; a retaining ring having an opening in fluid communication with the fluid passage and having a body engaging tab positioned along an outer peripheral surface and positioned in the retaining ring receiving surface, the retaining ring is fabricated from a material that is more rigid than a material of the housing and bites into the housing to mechanically bond the retaining ring in the housing, an annular surface of the retaining ring extends circumjacent the opening and having an axially inwardly tapering surface from radially outwardly to radially inwardly to define a centering flange, and a second valve receiving surface axially spaced from the centering flange; and a valve disposed in the fluid passage and sealing the fluid passage, the valve having opposed surfaces having a retaining ring mating surface extending from a first surface and in cooperative engagement with the second valve receiving surface and a housing mating surface extending from a second surface opposed to the first surface and cooperatively engaging the first valve receiving surface, the valve having a general concave piercing area adapted to be displaced axially away from the retaining ring opening to open the valve.