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2. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin , a 2-or- 3 + 1 ⁄ 2 -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a ...

3. Tow hitch - Wikipedia

   en.wikipedia.org/wiki/Tow_hitch

   A tow hitch (or tow bar or trailer hitch in North America [1]) is a device attached to the chassis of a vehicle for towing, or a towbar to an aircraft nose gear. It can take the form of a tow ball to allow swiveling and articulation of a trailer , or a tow pin, or a tow hook with a trailer loop, often used for large or agricultural vehicles ...

4. Two-wheel tractor - Wikipedia

   en.wikipedia.org/wiki/Two-wheel_tractor

   Two-wheel tractor or walking tractor (French: motoculteur, Russian: мотоблок (motoblok), German: Einachsschlepper) are generic terms understood in the US and in parts of Europe to represent a single-axle tractor, which is a tractor with one axle, self-powered and self-propelled, which can pull and power various farm implements such as a ...

5. Janney coupler - Wikipedia

   en.wikipedia.org/wiki/Janney_coupler

   The diagram from Beard's 1897 coupler patent [1]. Janney couplers were first patented in 1873 by Eli H. Janney (U.S. patent 138,405). [2] [3] Andrew Jackson Beard was amongst various inventors that made a multitude of improvements to the knuckle coupler; [1] Beard's patents were U.S. patent 594,059 granted 23 November 1897, which then sold for approximately $50,000, and U.S. patent 624,901 ...

6. Round turn and two half-hitches - Wikipedia

   en.wikipedia.org/.../Round_turn_and_two_half-hitches

   The round turn and two half hitches is a hitch used to secure the end of a rope to a fixed object. The name refers to the components used to form the knot: a round turn wraps the rope around the object (completely encircling it) and the two half hitches secure the end around the standing part. Variations of this hitch can be made with differing ...

7. Hitch (knot) - Wikipedia

   en.wikipedia.org/wiki/Hitch_(knot)

   Reverse half hitches: Round turn and two half-hitches: Sailor's hitch: A secure, jam-proof hitch. Siberian hitch: A knot used to attach a rope to an object. Slippery hitch: A knot used to attach a line to a rod or bar. Snell knot: A hitch knot used to attach an eyed fishing hook to fishing line. Snuggle hitch: A modification of the clove hitch ...