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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. Drawbar (haulage) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(haulage)

   On light vehicles, the most common coupling is an A-frame drawbar coupled to a 1 7/8 inch or 50 mm tow ball. These drawbars transmit around 10% of the gross trailer weight through the coupling. Heavy vehicles

4. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   At 2,500 pounds (1.1 t), the 9N could plow more than 12 acres (4.9 hectares) in a normal day pulling two 14-inch (360 mm) plows, [3] outperforming the tractive performance of the heavier and more expensive Farmall F-30 model. [3] The hitch's utility and simplicity have since made it an industry standard.

5. Motorcycle trailer - Wikipedia

   en.wikipedia.org/wiki/Motorcycle_trailer

   Ball and Socket Coupler. Most trailers are towed by joining a ball and a coupler (socket). [1] The coupler is attached to the trailer, and the ball hitch is attached to the tow vehicle. The coupler slides over the ball hitch. Then, pressure is applied to a clamp, usually with a toggle or lever, which secures the ball in the coupler.

6. 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]

7. Trailer connectors in North America - Wikipedia

   en.wikipedia.org/wiki/Trailer_connectors_in...

   7-pin trailer connector according to ISO 1185/SAE J560 (Towing vehicle side) Physical design according to standard ISO 1185 [4] / SAE J560. [5] [6]The plug for SAE J560 is physically identical to the connector ISO 1185.

8. 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 ...

9. Railway coupling by country - Wikipedia

   en.wikipedia.org/wiki/Railway_coupling_by_country

   English couplers on 1,676 mm (5 ft 6 in) and on 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge [7] AAR couplers on 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge [7] and some passenger (FIAT 7131 DMUs) and freight rolling stock on standard and broad gauge. Small knuckle coupler with slot in knuckle for link and pin couplers on 750 mm (2 ft 5 + 1 ...