Working platform

Details Working platform Working platform

1977-05-05

1981-06-23

Oresky, Lawrence J.

Material or article handling

Elevator or hoist and loading or unloading means therefor

Convertible attachment

212251, 182 2, 182 63, B66F 906

Patent

active

042747937

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-and-piston unit, and the column is movable lengthwise with respect to the second bearing by the crane cable.

REFERENCES:
patent: 1337487 (1920-04-01), Schlatter
patent: 2632530 (1953-03-01), Wagner
patent: 2821312 (1958-01-01), Wiegel
patent: 3504461 (1970-04-01), Copeland et al.
patent: 3608669 (1971-09-01), Lindsay, Jr.
patent: 3647099 (1972-03-01), Carriere
patent: 3907142 (1975-09-01), Welch
patent: 3966070 (1976-06-01), Barth

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