Topic summary
Cardan shaft

Extracted from the Wikipedia article Drive shaft.
Cardan shaft park brakes
A cardan shaft park brake works on the drive shaft rather than the wheels. These brakes are commonly used on small trucks. This type of brake is prone to failure and has led to incidents where the truck has run away on a slope, leading to safety alerts being issued. Heavy vehicles that have this type of park brake usually have a ratchet handle similar to a car's hand brake or parking brake, as opposed to an air brake button or lever.