High-capacity crane with counter-weight device

Details High-capacity crane with counter-weight device High-capacity crane with counter-weight device

1978-04-27

1980-05-27

Sheridan, Robert G.

Traversing hoists

Overhead

Cable

180118, B66C 2376

Patent

active

042046033

ABSTRACT:
A high capacity crane comprises a structure which is rotatable about a vertical axis on a corner frame supported on the ground and which supports a jib for raising a load and a counter-jib from which is suspended a counter-weight, the counter-weight being connected to the structure, wherein the counter-weight has a mass such that it cannot be raised from the ground by the load but is movable along the ground by means of an air cushion located beneath the counter-weight and connected to a compressed air supply and apparatus for regulating the pressure of the air supplied thereto.

REFERENCES:
patent: 3757699 (1973-09-01), Wirth
patent: 3842984 (1974-10-01), Brown et al.

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