Vehicle mounted crane

Details Vehicle mounted crane Vehicle mounted crane

1989-04-14

1991-05-14

Spar, Robert J.

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

212189, 212261, 212264, 414543, 414546, 414550, B66C 2300

Patent

active

050148630

ABSTRACT:
The possibility of the end 26 of a boom 20 of a vehicle mounted crane being moved downwardly into engagement with part of the crane or the vehicle on which it is mounted and causing damage thereto during elevation of a mast 18 for the crane from a stowed position (FIG. 2) to an elevated position (FIG. 1) is avoided in a construction wherein the mast 18 is formed of a parallelogram linkage including rigid links 60 and cylinders 72 which assure that the attitude of the boom 20 relative to a base 10 for the crane will not change during elevation of the mast 18.

REFERENCES:
patent: 2911111 (1959-11-01), Grove
patent: 3174630 (1965-03-01), Tantlinger et al.
patent: 3285445 (1966-11-01), Broziat
patent: 3513997 (1970-05-01), Heyer et al.
patent: 3718221 (1973-02-01), Visser
patent: 3952890 (1976-04-01), Armstrong
patent: 4218171 (1980-08-01), Guinot
patent: 4659276 (1987-04-01), Billett

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