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2. Quick coupler - Wikipedia

   en.wikipedia.org/wiki/Quick_coupler

   Many Original Equipment Manufacturers (OEMs) of construction equipment market a range of quick couplers. Some of these are designed and manufactured by the OEM but more often they are the products of one of the quick coupler manufacturers branded by the OEM and sold through the OEM's distribution chain or installed by the OEM in their factory.

3. File:Chain hoist.svg - Wikipedia

   en.wikipedia.org/wiki/File:Chain_hoist.svg

   This diagram was created with an unknown SVG tool. ... Principle of operation of a differential pulley or chain hoist, drawn by CMG Lee. Width: 100%: Height: 100%

4. Differential pulley - Wikipedia

   en.wikipedia.org/wiki/Differential_pulley

   He claimed that many engineering firms conceded on the difficulty of efficiently disengaging the chain from the teeth as the pulleys turned, but his firm developed a "pitch" chain which solved the issue. Marketed as "Weston Differential Pulley Blocks with Patent Chain Guides", the pulley had good sales, namely, 3000 sets in 9 months.

5. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   The three-point hitch (British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [ 1 ] [ 2 ] The three points resemble either a triangle, or the letter A.

6. 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.

7. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   Diagram 3 shows three rope parts supporting the load W, which means the tension in the rope is W/3. Thus, the mechanical advantage is three-to-one. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff tackle.

8. Hoist (mining) - Wikipedia

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

   A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), however modern large hoists use alternating current drives that ...

9. Trencher (machine) - Wikipedia

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

   A chain trencher cuts with a digging chain or belt that is driven around a rounded metal frame, or boom. It resembles a giant chainsaw. This type of trencher can cut ground that is too hard to cut with a bucket-type excavator, and can also cut narrow and deep trenches. The angle of the boom can be adjusted to control the depth of the cut.