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A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [1] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. [1] [2] An archaic spelling is gib. [3] Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom.
The "hammerhead", or giant cantilever, crane is a fixed-jib crane consisting of a steel-braced tower on which revolves a large, horizontal, double cantilever; the forward part of this cantilever or jib carries the lifting trolley, the jib is extended backwards in order to form a support for the machinery and counterbalancing weight. In addition ...
KONE Cranes Division remained an integral component of Kone until the year 1994. In February of that year, Kone made a strategic decision to refocus its efforts on the elevator business, leading to the divestiture of the crane division into an independent entity. This newly established company was named KCI Konecranes, with ownership ...
Heikki H. Herlin took over as Kone’s president in 1932. Kone’s first foreign subsidiary, AB Kone Hissar of Sweden, was established in 1957. After World War II, Kone was called upon by the Finnish government to contribute elevators, electric hoists, and cranes to the war reparations being paid to the Soviet Union. This program forced Kone to ...
The crane was powered by a semi-portable steam engine in a small cabin at the rear of the jib, also helping as a counterweight. 1871 timber queen post truss jib, for the North Sea Canal Construction of the Dutch Noordzeekanaal from 1865 to 1876 used a variety of cranes, including two significant examples of the Hercules type.