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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.
Kirow Ardelt GmbH Eberswalde, referred to as Ardelt, is a German crane manufacturer. The company specialises in manufacturing double jib level luffing cranes which are based on the patented double jib principle. Ardelt has produced more than 4,700 harbour cranes. [1] Ardelt also makes single jib-level luffing cranes and balancer cranes.
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Chebyshev linkages did not receive widespread usage in steam engines, [citation needed] but are commonly used as the 'Horse head' design of level luffing crane.In this application the approximate straight movement is translated away from the line's midpoint, but it is still essentially the same mechanism.
Doughton Park (Doughton Recreational Area) is the largest recreation area the National Park Service manages on the Blue Ridge Parkway.It is located between mile markers 238.5 - 244.7 [1] on the border between Wilkes and Alleghany Counties in North Carolina.
en:Stothert & Pitt electric dockside crane with Toplis level luffing gear. Bristol Industrial Museum: Date: Photo June 2004. Source: Cropped from Image:Bristol pw from ms.jpg so as to show a better close-up of a single crane. Author: Joe D (original photographer) Permission (Reusing this file)
Pettigrew State Park is a North Carolina State Park in Tyrrell and Washington Counties, North Carolina in the United States. It covers 5,951 acres (24.08 km 2) [2] around the shore lines of Lake Phelps and the Scuppernong River. The park's developed facilities are south of U.S. Route 64 near Roper and Creswell, North Carolina.
This specific example uses a level luffing mechanism to maintain the load at approximately the same vertical height as the jib moves through its range of travel. 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]