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Replacing an advertising poster in London using an aerial work platform. An aerial work platform (AWP), also an aerial device, aerial lift, boom lift, bucket truck, cherry picker, elevating work platform (EWP), mobile elevating work platform (MEWP), or scissor lift, is a mechanical device used to provide temporary access for people or equipment to inaccessible areas, usually at height.
The patent was titled "Aerial Ski Tramway,' U.S. patent 2,152,235. W. Averell Harriman, Sun Valley's creator and former governor of New York State, financed the project. [24] [25] Mont Tremblant, Quebec opens in February 1938 with the first Canadian chairlift, built by Joseph Ryan. [26] The ski lift had 4,200 feet of cable and took 250 skiers ...
A detachable chairlift or high-speed chairlift is a type of passenger aerial lift, which, like a fixed-grip chairlift, consists of numerous chairs attached to a constantly moving wire rope (called a haul rope) that is strung between two (or more) terminals over intermediate towers. In contrast to the fixed-grip version, the chairs of a ...
Hall Ski-Lift – United States, founded in 1954, [55] merged with Von Roll in 1982 WSO Städeli – Switzerland, manufactured ropeways from 1957, acquired by Garaventa in 1991 [ 67 ] Tebru – Switzerland, acquired by WSO Städeli [ 67 ] [ 68 ]
Stage lifts and orchestra lifts are specialized elevators, typically powered by hydraulics, that are used to raise and lower entire sections of a theater stage. For example, Radio City Music Hall has four such elevators: an orchestra lift that covers a large area of the stage, and three smaller lifts near the rear of the stage.
The most common lift table design incorporates hydraulic cylinders and an electrically powered pump to actuate the scissor lifting mechanism. Lift tables can also be driven by pneumatic sources, trapezoidal-threaded screw drives, push chains or by hydraulic foot pump when the load is not heavy. The choice of drive mechanism depends on factors ...