Methods and apparatus for inspecting and/or working inside of a

Details Methods and apparatus for inspecting and/or working inside of a Methods and apparatus for inspecting and/or working inside of a

1975-11-21

1977-03-08

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Scaffold supported internally on shaft

182142, 182150, E04G 136

Patent

active

040108236

ABSTRACT:
Methods and one apparatus are disclosed for inspecting or working on the internal wall surface of a large drum, as a five story high coke drum for use in a delayed coking unit for restoring petroleum fractions. The apparatus or assembly comprises a triangular spider hanging bracket hoisted up to and connected to one end of a crosshead secured across the top of an opening in the top of the drum, and an inspector's or workman's cage having a hoist hooked to one end of the triangular bracket for traversing the full height of one sector of the drum internal wall before the cage is lowered to a temporary deck, the crosshead rotated through a predetermined angle on the drum top, and the cage raised again for covering another sector of the internal wall surface. This assembly forms a fast, thorough, safe, economical, and efficient system for inspecting and/or working on the internal wall surface of a large drum.

REFERENCES:
patent: 3420332 (1969-01-01), Textor
patent: 3491851 (1970-01-01), Dutcher
patent: 3556252 (1971-01-01), Atkins

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