Closure lid assembly for protective housings

Details Closure lid assembly for protective housings Closure lid assembly for protective housings

1975-09-04

1977-09-20

Braun, Leslie

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

49465, 137364, 220 74, 220328, E02D 2910

Patent

active

040487660

ABSTRACT:
Disclosed is a lid assembly having a lid support and cooperating lid constructed of structural foam molded synthetic polymeric material, the lid support including a base portion adapted for nontranslatable removable engagement with various diameter protective housings and having an upstanding wall portion defining a surface access opening, the closure lid having a construction adapted to fit within and close off the surface access opening. The lid support includes a plurality of circumferentially extending reinforcing ribs, selected ones of which are flat and thus define stacking ledges; and the lid includes a network of transversely intersecting ribs providing the principal structural support for the lid.

REFERENCES:
patent: 314781 (1885-03-01), Beckwith
patent: 689224 (1901-12-01), Pillsbury
patent: 1131327 (1915-03-01), Caldwell
patent: 1177850 (1916-04-01), Dougherty
patent: 1277373 (1918-09-01), Bugbie
patent: 1447256 (1923-03-01), Lincoln
patent: 2113713 (1938-04-01), Slocum
patent: 3392867 (1968-07-01), Morris
patent: 3611889 (1971-10-01), Levinson
patent: 3717963 (1973-02-01), Sauriol
patent: 3920347 (1975-11-01), Sauriol et al.
patent: 3921449 (1975-11-01), Hauffe et al.

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