Method and device for dismounting or mounting jib sections on a

Details Method and device for dismounting or mounting jib sections on a Method and device for dismounting or mounting jib sections on a

1976-10-28

1977-12-27

Larson, Lowell A.

Metal working

Method of mechanical manufacture

Disassembling

29431, 212 46R, 212144, 52122, B23P 1900, B23P 1100

Patent

active

040646157

ABSTRACT:
The invention relates to a method of dismounting or mounting jib sections on a tower crane, at which a carrying cradle with counterweight and having the form of a three-armed lever is used for lowering or hoisting jib sections to be dismounted and mounted, respectively, and the cradle is so designed as to during the lowering and hoisting operations, respectively, to assume suitable balanced positions.

REFERENCES:
patent: 3426914 (1969-02-01), Waleson et al.
patent: 3438160 (1969-04-01), Gostling
patent: 3450280 (1969-06-01), Colnot
patent: 3793702 (1974-02-01), Ahlgren
patent: 3888356 (1975-06-01), Redelfs

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