Method and device of reblocking to an increased or reduced numbe

Details Method and device of reblocking to an increased or reduced numbe Method and device of reblocking to an increased or reduced numbe

1974-01-29

1976-11-23

Spar, Robert J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

212102, B66D 304

Patent

active

039932877

ABSTRACT:
In a lifting gear comprising a lifting cable and two blocks, e.g. the upper trolley block and the lower hook block, respectively, of a hoisting crane, the number of cable parts, in which the lower block is hanging, is changed, in order to increase or decrease the lifting capacity, by means of a cable catching means being arranged on the lower block, which catching means is capable of catching (or disengaging) a cable part running horizontally in the upper block, which cable part is pulled down as two further parts with the catching means and at ground level laid under a further rope pulley of the lower block. Reblocking to fewer cable parts is carried out in the reverse order.

REFERENCES:
patent: 308275 (1884-11-01), Oborn
patent: 466090 (1891-12-01), Brown
patent: 3306469 (1967-02-01), Durand
patent: 3620504 (1971-11-01), Morrison

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