Crane having a readily removable outer boom section

Traversing hoists – Having means facilitating assembly or disassembly – Of boom sections

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Details

212349, B66C 23693

Patent

active

056950829

ABSTRACT:
A crane apparatus includes an upstanding mainframe and a boom unit supported for pivoting movement on the mainframe about a horizontal axis. The boom unit includes a base boom, an outer boom section of one or more outer booms, and a fluid-actuated piston-and-cylinder assembly. A pair of space mounting walls are presented by the base boom in which a hole is defined, and the piston-and-cylinder assembly includes a proximal transverse sleeve sized for receipt between the spaced walls of the base boom in alignment with the hole. A pin is provided that is sized for receipt in the hole and the tubular sleeve for securing the piston-and-cylinder assembly to the base boom. Removal of the pin enables the outer boom section and piston-and-cylinder assembly to be removed from the base boom.

REFERENCES:
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patent: 3523336 (1970-08-01), Kimber
patent: 3736710 (1973-06-01), Sterner
patent: 3804262 (1974-04-01), Wiencek et al.
patent: 4011699 (1977-03-01), Mickelson
patent: 4125974 (1978-11-01), Kay et al.
patent: 4514939 (1985-05-01), Rathe et al.
patent: 4588347 (1986-05-01), Murta
patent: 5494396 (1996-02-01), Wilson

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