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2. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   Because there is a traveling pulley at the load, this doubles the mechanical advantage of the fixed (anchored) sprocket assembly, leading to a total mechanical advantage of 2 × ⁠ P 1 / P 1 − P 2 ⁠. For instance, a 1-ton differential chain fall might have a 15-pocket and a 14-pocket sprocket set.

3. Engine crane - Wikipedia

   en.wikipedia.org/wiki/Engine_crane

   The electric chain hoist, also known as the "electric hoist", is the least used type of engine crane. The operation is similar to the chain hoist in the way that chains are used to lift the engine. The electric chain hoist uses an electric motor operated by remote control to lift the engine, unlike the chain hoist where the operator has to ...

4. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

5. Crane (machine) - Wikipedia

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

   133 m (436 ft) tall, 120 m (394 ft) span, lift-height 80 m (262 ft) Kockums Crane. shipyard crane formerly at Kockums, Sweden. 138 m (453 ft) tall, 1,500 tonnes (1,500 long tons; 1,700 short tons) capacity, since moved to Ulsan, South Korea; Samson and Goliath (cranes) two gantry cranes at the Harland & Wolff shipyard in Belfast built by Krupp

6. 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 ...

7. Saipem 7000 - Wikipedia

   en.wikipedia.org/wiki/Saipem_7000

   The whip hook has a capacity of 120 tonnes at 150 m. The 2nd Auxiliary hook can be deployed to a water depth of 450 m. The two cranes are capable of a tandem lift of 14,000 tonnes. Each crane was fitted with 15,600 hp (11,630 kW) engines to power the boom and load hoists, 9 tugger lines and the crane slewing system.