Working platform

Details Working platform Working platform

1980-11-19

1984-05-22

Machado, R. P.

Fire escape, ladder, or scaffold

Having transpositioning base and erecting means

182 2, 182142, 182150, E04G 122, E04G 136

Patent

active

044496117

ABSTRACT:
The boom of a crane carries a pivot bearing for a second bearing which guides an elongated column. The upper or the lower end of the column supports a gallery which is turnable about its axis. The second bearing is pivotable about the horizontal axis of the pivot bearing by a cylinder-piston unit and the column is movable lengthwise with respect to the second bearing by means of the crane cable.

REFERENCES:
patent: 1337487 (1920-04-01), Schlatter
patent: 2632530 (1953-03-01), Wagner
patent: 2821312 (1958-01-01), Wiegel
patent: 3039233 (1962-06-01), Holmes
patent: 3504461 (1970-04-01), Copeland
patent: 3608669 (1971-09-01), Lindsay
patent: 3647099 (1972-03-01), Carriere
patent: 3907142 (1975-09-01), Welch
patent: 3966070 (1976-06-01), Barth
patent: 4074790 (1978-02-01), Colbachini

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