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2. Tow hitch - Wikipedia

   en.wikipedia.org/wiki/Tow_hitch

   The trailer hitch ball attaches to a ball mount; with a diameter typically 1 ⁄ 16 inch (1.6 mm) larger than the ball bolt/shank diameter. [2] The ball mount must match the SAE hitch class. [3] The ballmount for a receiver-type hitch is a square bar that fits into a receiver attached to the vehicle.

3. American Crane Corporation - Wikipedia

   en.wikipedia.org/wiki/American_Crane_Corporation

   The first mobile crane, the Traveling Derrick, was invented in 1895. It consisted of a revolving derrick and steam hoist mounted on a rail-car like wheels. The ditcher, a flatcar-mounted crane designed to excavate soil on either side of a railroad, was invented by Oliver Crosby in 1904. [4]

4. Towing - Wikipedia

   en.wikipedia.org/wiki/Towing

   For cars and light trucks, towing is accomplished via a trailer hitch. In addition to the vehicle limits, the hitch assembly may have its own set of limits, including tongue weight (the amount of weight that presses downward on the hitch) and trailer weight (the full weight of the trailer, including contents).

5. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   The semi-trailer increased the capacity of trucks, but it was the fifth wheel that brought the flexibility for drivers to keep moving while receivers unloaded the loads they just delivered. The Fruehauf Trailer Corporation helped to make the Martin Rocking 5th Wheel a success by installing them on their popular new semi-trailer design.

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. Euclid Trucks - Wikipedia

   en.wikipedia.org/wiki/Euclid_Trucks

   Euclid truck in use at Chuquicamata copper mine in 1984 Euclid truck at a quarry in Poland (2013) The Euclid Company of Ohio was a manufacturer which specialized in heavy equipment for earthmoving, particularly dump trucks, loaders and wheel tractor-scrapers. It operated in the US from the 1920s to the 1950s, when it was purchased by General ...