Method of converting existing tank access ways

Details Method of converting existing tank access ways Method of converting existing tank access ways

1998-11-20

2000-08-29

Lillis, Eileen D.

Road structure, process, or apparatus

Pavement

Vault cover-closure

220323, 2922565, E02D 2914

Patent

active

06109823&

ABSTRACT:
A method of replacing an outwardly opening manhole cover that provides access to the interior of a tank or the like with an inwardly opening cover that includes the steps of removing the outwardly opening cover from the bolting flange of a tank installed manway and attaching a mounting flange to the manway bolting flange. A pair of hinges are connected to the mounting flange and an inwardly opening cover assembly is rotatably mounted on the hinges. The cover of the assembly is arranged to close and seal against either the mounting flange or the inner rim of the existing manway.

REFERENCES:
patent: 2551750 (1951-05-01), Liskey, Jr.
patent: 2744654 (1956-05-01), Swerdlow
patent: 2900104 (1959-08-01), Schmidt, Jr.
patent: 3045861 (1962-07-01), Dieter et al.
patent: 3077360 (1963-02-01), Israel
patent: 3721363 (1973-03-01), Bressler et al.
patent: 3744670 (1973-07-01), De Frees
patent: 4393756 (1983-07-01), van der Schoot
patent: 4566375 (1986-01-01), van der Schoot
patent: 5625655 (1997-04-01), McDonald et al.
patent: 5660295 (1997-08-01), Hroma et al.
Chemipulp Process, Inc. "Manway Fabrication Details" Jun. 29, 1998.

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