Telescopic cranes

Details Telescopic cranes Telescopic cranes

1980-12-19

1983-07-26

Love, John J.

Traversing hoists

Having boom shiftable vertically along a linear path

Fluid actuated

212222, 212184, 414144, 52118, B66C 2300

Patent

active

043949142

ABSTRACT:
In a telescopic crane comprising a telescopic shaft and a variable length boom pivotally mounted on the end of the shaft, the position of the boom relative to the shaft is controlled by a jack pivotally connected at one end to the shaft and at the other end to one end of a mast, the other end of the mast being connected to the boom, and ties connect the one end of the mast to the boom outwardly of the connection of the boom to the other end of the mask.

REFERENCES:
patent: 3198345 (1965-08-01), Brekelbaum et al.
patent: 3462023 (1969-08-01), Grove
patent: 3664516 (1972-05-01), Goudy
patent: 3872977 (1975-03-01), Noly
patent: 3968884 (1976-07-01), Johnson et al.
patent: 4036372 (1977-07-01), Ros et al.
patent: 4039085 (1977-08-01), Livengood
patent: 4169535 (1979-10-01), Bryan, Jr.

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