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2. Wheel clamp - Wikipedia

   en.wikipedia.org/wiki/Wheel_clamp

   Wheel clamp as used by the Los Angeles Department of Transportation. A wheel clamp, also known as wheel boot, parking boot, or Denver boot, [1][2] is a device that is designed to prevent motor vehicles from being moved. In its most common form, it consists of a clamp that surrounds a vehicle wheel, designed to prevent removal of both itself and ...

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. Locking differential - Wikipedia

   en.wikipedia.org/wiki/Locking_differential

   Locking differential. A locking differential is a mechanical component, commonly used in vehicles, designed to overcome the chief limitation of a standard open differential by essentially "locking" both wheels on an axle together as if on a common shaft. This forces both wheels to turn in unison, regardless of the traction (or lack thereof ...

5. Lockrod - Wikipedia

   en.wikipedia.org/wiki/Lockrod

   Patented originally in 1912, the lockrod was first used to secure railroad boxcar doors. Today, sometimes confused with locking bars or bar locks, lockrods have evolved to secure virtually every trailer or container that has a swing door (a door that swings open and closed rather than rolls up). Roll up doors are sometimes used in place of ...

6. Wheellock - Wikipedia

   en.wikipedia.org/wiki/Wheellock

   A wheellock pistol or puffer, Augsburg, c. 1580. A wheellock, wheel-lock, or wheel lock is a friction-wheel mechanism which creates a spark that causes a firearm to fire. It was the next major development in firearms technology after the matchlock, and the first self-igniting firearm. Its name is from its rotating steel wheel to provide ignition.

7. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   The load index on a passenger-car tire is a two- or three-digit numerical code used to cross-reference a load & inflation table that will give the maximum load each tire can carry at a given pressure. The load index is sometimes used in conjunction with the load range, which appears elsewhere on the tire.