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2. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   The difference in radii can be made very small, making the mechanical advantage of this pulley system very large. [ 4 ] [ 5 ] In the extreme case of zero difference in radii, MA becomes infinite, thus no force (besides friction) is needed to move the chain, but moving the chain will no longer lift the load.

3. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   The mechanical advantage is 2, requiring a force of only 50 N to lift the load. A block and tackle is characterized by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load. Its mechanical advantage is the number of parts of the rope that act on the load. The mechanical advantage of a ...

4. Rigging (material handling) - Wikipedia

   en.wikipedia.org/wiki/Rigging_(material_handling)

   Rigging systems commonly include shackles, master links and slings, and lifting bags in underwater lifting. In the United States the Occupational Safety and Health Administration (OSHA) regulates workplace safety including rigging in CFR 1926.251. [2] The Health and Safety Executive is responsible for the matters in the United Kingdom.

5. Hydraulic hooklift hoist - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_hooklift_hoist

   Such systems operate between 4,000 to 5,800 psi (28,000 to 40,000 kPa). The North American market developed low pressure / high volume systems, which allowed operators to share the hoist's hydraulic system with other hydraulically powered devices. These systems typically operate with a larger gear pump and larger hydraulic reservoir. Operating ...

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