Two-way extendable crane trolley

Details Two-way extendable crane trolley Two-way extendable crane trolley

1980-09-26

1982-11-23

Sheridan, Robert G.

Traversing hoists

Having boom shiftable vertically along a linear path

Length of hoisting cable between boom and load decreases...

105163R, 105393, 212210, 212221, 254285, 254399, B66C 902

Patent

active

043601120

ABSTRACT:
A two-way horizontally extendable trolley 22 comprising a trolley frame 51 and wheels 52 for supporting trolley frame 51, a first horizontally elongated trailer frame 54 slidably mounted on frame 51, and a second horizontally elongated trailer frame 55 slidably mounted on trolley frame 51, said trailer frames 54 and 55 each having a first end extending beyond an end of frame 51, and auxiliary wheels 56 and 57, respectively, for supporting said first ends. Trolley 22 includes: means for horizontally extending trailer frames 54 and 55 outwardly from the trolley frame 51 and retracting trailer frames 54 and 55 inwardly toward trolley frame 51; hoisting means mounted on trolley frame 51; auxiliary hoisting means mounted on trailer frames 54 and 55; and means for driving wheels 52. Crane 10 for use with trolley 22 is also disclosed.

REFERENCES:
patent: 3009583 (1961-11-01), Pierson
patent: 3297170 (1967-01-01), McCready et al.
patent: 3458229 (1969-07-01), Nagy et al.
patent: 3727778 (1973-04-01), Hollenback
patent: 3784028 (1974-01-01), Stewart
patent: 3854592 (1974-12-01), Mordre
patent: 3895818 (1975-07-01), Fearon

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