Fluid handling – With casing – support – protector or static constructional... – Static constructional installations
Patent
1982-09-01
1985-01-01
Chambers, A. Michael
Fluid handling
With casing, support, protector or static constructional...
Static constructional installations
137381, 220 37, 220 38, 220 18, F16L 500
Patent
active
044911475
ABSTRACT:
A fillbox system to prevent water from entering the below ground level inlet of an input stand pipe for an underground fuel storage tank. The system includes a fillbox about the inlet stand pipe which extends upwardly therein and a fillbox cover having a downwardly extending skirt which extends almost to the bottom of the fillbox. The skirt, generally has the same outer shape as the inner sides of the fillbox but a slightly smaller dimension than that of the fillbox adjacent the cover. The skirt has a small inward draft angle as it extends downwardly about the stand pipe so that when placed on the fillbox, the cover is guided by the skirt into a proper seating relationship. At the same time, the skirt and cover trap enough air therewithin so that the level of water seeping in the fillbox can never exceed a volume that would produce a water height above the inlet with the cover removed to leak into the underground storage tank when the inlet is opened.
REFERENCES:
patent: 3263853 (1966-08-01), Smith
patent: 3561470 (1971-02-01), Hawle
patent: 3611889 (1971-10-01), Levinson
patent: 3952908 (1976-04-01), Carson
patent: 4065020 (1977-12-01), Carson
patent: 4153176 (1979-05-01), Carson
patent: 4163503 (1979-08-01), McKinnon
patent: 4350177 (1982-09-01), Firchau et al.
Brown Boniard I.
Chambers A. Michael
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