A Cardan joint, also known as a universal joint, is a mechanical device that allows for the transmission of rotary motion between two shafts that are not in line with each other. It consists of two yokes connected by a cross-shaped component, enabling flexibility in movement while maintaining torque transfer. This design is commonly used in various applications, including vehicles and machinery. The Cardan joint was named after the Italian mathematician and engineer Gerolamo Cardano, who contributed to its development in the 16th century. Its ability to accommodate angular misalignment makes it essential in systems where shafts must connect at different angles, such as in automotive drive shafts and industrial equipment.