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2. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   Modern fifth wheels allow the trailers to slide into the fifth wheel and lock into it very reliably when maintained and serviced properly. The engagement of the king pin into the fifth-wheel locking mechanism is the only means of connection between tractor and trailer; no other device or safety mechanism is used.

3. 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 ...

4. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...

5. Steering-wheel lock - Wikipedia

   en.wikipedia.org/wiki/Steering-wheel_lock

   A steering-wheel lock is a visible anti-theft device. A steering-wheel lock is a visible anti-theft device [1] [2] that immobilizes the steering wheel of a car.. Also known as a crook lock, [3] or club lock, [4] the first generation of steering-wheel locks, known as canes, [5] consisted of a lockable bar that connected the steering wheel to the brake pedal or clutch pedal.