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2. Tow hitch - Wikipedia

   en.wikipedia.org/wiki/Tow_hitch

   Tow hitch. A tow ball mounted on the rear of a vehicle. A screw-on tow hook mounted at the front of a vehicle. 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 ...

3. 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- -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 fifth wheel ...

4. Trailer connectors in North America - Wikipedia

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

   7-pin round blade connector (SAE J2863) This is common for RVs and other large trailers which have additional loads beyond the basic for tail lights and brake/turn signals. The standard is defined by SAE J2863, Automotive Trailer Tow Connector . Reversing lamps, control current to block surge brakes when reversing.

5. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   A cab over semi-tractor. Tractor with an end-dump trailer. A FAW semi-trailer truck in China. A semi-trailer truck[ 1] (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 .

6. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   The three-point hitch ( British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [ 1][ 2] The three points resemble either a triangle, or the letter A. In engineering terms, three-point attachment is the simplest and the only statically determinate ...

7. Pintle - Wikipedia

   en.wikipedia.org/wiki/Pintle

   In electrical cubicle manufacture, a pintle hinge is a hinge with fixed and moving parts. The hinge has a pin "pintle" and can be both external and internal. The most common type consists of three parts. One part on the body of the cubicle, one part on the door and the third part is the pintle. In transportation, a pintle hitch is a type of tow ...