Traversing hoists – Having vertically swinging boom – Extensible by movement of boom or boom segment along...
Patent
1981-08-17
1985-01-08
Blix, Trygve M.
Traversing hoists
Having vertically swinging boom
Extensible by movement of boom or boom segment along...
212227, 212231, 212239, 212261, 212262, 212268, 212186, B66C 700, B66C 2356, B66C 2304
Patent
active
044923112
ABSTRACT:
A coupling and latching mechanism for a multisection extensible boom that includes a manual section and is operable from a remote location such as the cab of a crane. The mechanism includes pairs of spaced jaw type couplings secured to adjacent boom sections and adapted to be selectively coupled to the piston rod or the like of an extensible power means for operating the boom either with the manual section extended or retracted. Remotely controlled latch means are provided to latch the manual section in a plurality of extended positions, or in a retracted position.
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Blix Trygve M.
FMC Corporation
Johnson R. B.
Kamp R. C.
Megley R. B.
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