enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Level luffing crane - Wikipedia

   en.wikipedia.org/wiki/Level_luffing_crane

   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.

3. Jib (crane) - Wikipedia

   en.wikipedia.org/wiki/Jib_(crane)

   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.

4. Hercules crane - Wikipedia

   en.wikipedia.org/wiki/Hercules_crane

   A crane was needed which could set larger and heavier blocks, up to 30 tons. The Hercules design combined aspects of both the earlier fixed-jib gantry cranes built for works at Manora and that would later be used for a slewing jib crane at Port Alfred. A horizontal jib was added, with the ability to slew sideways.

5. Ring crane - Wikipedia

   en.wikipedia.org/wiki/Ring_crane

   A ring crane is a form of large construction crane with a luffing jib. It is distinguished by its slew pivot [i] being in the form of a ring-shaped track, rather than a narrow central spindle. The broad base this gives to the slewing section above allows it to slew whilst carrying extremely heavy loads. Ring cranes are rare.

6. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   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 ...

7. Fairbairn steam crane - Wikipedia

   en.wikipedia.org/wiki/Fairbairn_steam_crane

   The jib has a radius (reach) of 35 feet (11 m) and a height of 40 feet (12 m). The crane weighs 120 tons. A vertical boiler inside the cab operates at 100 psi and supplies two twin-cylinder steam engines: one for slewing (turning) the crane, a larger one for winding the lifting chain. The winding drums can be driven by their gearing at four ...