US Patent 9038786 Multifunctional castor

A multifunctional castor with steering, directional and brake functions and is provided with a mounting seat, a rotary seat, an engaging member, a wheel, a brake swing member, a longitudinal rod assembly, an engaging assembly, a transverse rod, a brake pedal and a brake-release pedal. Pressing down or pushing up the brake pedal can activate the steering, direction and brake functions of the castor, and then the steering, direction and brake functions of the castor can be deactivated by controlling the brake-release pedal.