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2. 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 ...

3. Westfalia-Werke - Wikipedia

   en.wikipedia.org/wiki/Westfalia-Werke

   Before 1932, trailers used only jaw or hook couplings with an eyelet for trailer towing. In 1932, Franz Knöbel developed the trailer hitch with a ball head and socket joint. Franz Knöbel patented the ball head-socket joint trailer hitch invention on March 14, 1934. Westfalia hold a number of towing patents. [5] [3] [6]

4. 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 ...

5. Curtiss Aerocar - Wikipedia

   en.wikipedia.org/wiki/Curtiss_Aerocar

   A similar hitch was used in The Brighton Trailer and may have been the hitch referred to (but not patented) in the Curtiss Camp Car patent of 1921. It consisted of a pneumatic aircraft wheel mounted horizontally within a square wooden (later aluminum) frame that was bolted to the rear of the tow vehicle (usually a modified coupe to accommodate ...

6. 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).

7. Trailer (vehicle) - Wikipedia

   en.wikipedia.org/wiki/Trailer_(vehicle)

   A full trailer is a term used in the United States and New Zealand [4] for a freight trailer supported by front and rear axles and pulled by a drawbar. In Europe this is known as an A-frame drawbar trailer, and in Australia it is known as a dog trailer. Commercial freight trailers are produced to length and width specifications defined by the ...