Hydraulically operated cranes

Details Hydraulically operated cranes Hydraulically operated cranes

1982-11-24

1985-11-19

Blix, Trygve M.

Traversing hoists

Having boom shiftable vertically along a linear path

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

212213, 212217, B66C 1116

Patent

active

045536759

ABSTRACT:
A hydraulically operated crane of either the jib or bridge type with the hoist block supported from a trolley movable along the support structure provided by the jib or bridge. The rope and sheave system to control the lifting and lowering of the hoist block provides a balanced fleet through system and the actuating power for the system is provided by a special hydraulic multiplying linear motor mounted in the jib or bridge. The arrangement of the sheaves is such that movement of the multiplying linear motor causes travel of the hoist rope to be balanced about the hoist block with the rope taken in or let out evenly over the trolley sheaves.

REFERENCES:
patent: 435164 (1890-08-01), Wood
patent: 2983390 (1961-05-01), Lang et al.
patent: 2984191 (1961-05-01), Smith
patent: 3113681 (1963-12-01), Crile
patent: 3294252 (1966-12-01), Hosoi et al.
patent: 3575300 (1971-04-01), Durand
patent: 3588049 (1971-06-01), Nectoux
patent: 3907120 (1975-09-01), Johnston et al.
patent: 4343406 (1982-08-01), Noly
patent: 4411070 (1983-10-01), Boyum et al.

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