Fire escape – ladder – or scaffold – Scaffold supported internally on shaft
Patent
1975-11-17
1978-01-17
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Scaffold supported internally on shaft
182150, E04G 310
Patent
active
040687384
ABSTRACT:
This invention is staging or scaffolding for use within a tank for example a storage tank in chemical plant or in a marine oil tanker, and an assembly of staging comprises a number of platforms each coupled to at least three flexible chains adapted for connection at top and bottom to a side wall or the roof or floor of the tank with the chains extending vertically between the top and bottom fixing points and the platforms extending horizontally and spaced vertically from one another. The assembly can be collapsed and lowered through a hatch in the roof of the tank or can be built up within the tank and the connection at the top may be to a releaseable shackle which remains engaged so long as the chains are supporting substantial weight, but which automatically release when weight is removed so that removal of the staging after it is no longer required can be done quite safely without an operator standing on the staging.
REFERENCES:
patent: 295592 (1884-03-01), Suber
patent: 763274 (1904-06-01), Foster
patent: 1484480 (1924-02-01), Donaggio
patent: 1506114 (1924-08-01), Donaggio
patent: 1750269 (1930-03-01), Johnston
patent: 3454131 (1969-07-01), Johnson
patent: 3454133 (1969-07-01), Gregord
patent: 3462945 (1969-08-01), Barber
patent: 3747706 (1973-07-01), Paine
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