Hydraulically operated cranes

Details Hydraulically operated cranes Hydraulically operated cranes

1985-06-21

1987-05-26

Peters, Jr., Joseph F.

Traversing hoists

Having boom shiftable vertically along a linear path

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

2121421, B66C 1700

Patent

active

046678352

ABSTRACT:
A crane has a hollow substantially cylindrical load trolley supporting a girder and a support arrangement for the girder. A trolley track device is positioned on the outside of the hollow cylindrical girder for traversing a load along the girder means. A load trolley is supported upon the trolley track with the trolley track being arranged so that a line of action of a load force is applied tangentially to the hollow cylindrical girder. A hogging arrangement is mounted towards the base of the hollow cylindrical girder. The hogging arrangement includes a tensioning member extending the length of the girder.

REFERENCES:
patent: 484437 (1892-10-01), Kennedy
patent: 3113681 (1963-12-01), Crile
patent: 3294252 (1966-12-01), Hosoi et al.
patent: 3844417 (1974-10-01), Holm
patent: 4132040 (1979-01-01), Grove

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