Closure lid assembly for protective housings

Claim 1

A two part closure assembly for closing off the surface access opening to a plurality of cylindrically shaped housings having peripheral walls of respectively different radii, the housings being of the type disposed around, and employed to protect, underground installations, said two part closure assembly comprising: a. a closure support means of synthetic polymeric material construction and adapted for removable, but non-translatable, coupling with each of said cylindrically shaped housings, said closure support means comprising a circular, laterally extending base portion; an annular side wall integrally joined with, and inclined with respect to, said base portion; an annular ring portion integrally joined with said side wall and having a flange vertically recessed therefrom to define a support ledge, said annular side wall and ring portion displaced inwardly from the outer periphery of said base portion; a plurality of arcuately shaped ribs circumferentially disposed around the base portion and integrally formed with said base portion, side wall and ring portion; said ribs continuously extending from a location outside of, to a location inside, said annular side wall; a plurality of sets of circumferentially disposed lugs extending from the bottom surface of said base portion, each of said sets located at respectivey different radii along said base portion and corresponding to the radii of the peripheral walls of said cylindrically shaped housings, each of said lugs having surfaces adapted for non-translatable engagement with the peripheral wall of said housings; and a plurality of curcumferentially spaced notches in said flange; and b. closure means of synthetic polymeric material removably coupled with said closure support means and closing off said surface access opening, said closure means supported by said support ledge and comprising projection means retainably received within one of said spaced notches.