Joystick for control of cleaning vehicle functions

A self-propelled cleaning vehicle has cleaning gear including sweeping brushes, suction nozzle and associated equipment including spray nozzles for spraying clean water, and a wander hose. Control of the cleaning gear requires individual control of brush positions, altitude and loading, suction fan, water sprays, and other equipment. Control of all these functions is provided by means of a joystick having at its upper end an associated panel of finger or thumb-operable buttons or the like. These select cleaning gear programmes and change the function controlled by the joystick. In this way, the joystick provides means whereby arm and thumb control of a single lever enables detailed control of a multiplicity of functions to be provided.