GLASS WASHING APPARATUS FOR A MOTOR VEHICLE

A motor vehicle headlamp glass washing apparatus comprises a jet nozzle mounted on a retractable jet carrier and supplied selectively from a source of washing liquid under pressure. The jet carrier comprises a variable volume chamber, which is defined by a fixed element and a movable element which slides on the fixed element and which carries the jet nozzle. A spring acts between the fixed and movable elements to bias the movable element into a retracted position. Supply of liquid under pressure to the variable volume chamber initially moves the movable element against the action of the spring into a deployed position, and then supplies the liquid to the jet nozzle. The fixed element is a tube open at a free end and connected to the liquid source at its other end, the movable element comprising a closed body having an internal space communicating with the jet nozzle. This space is delimited by a first part sliding sealingly on the outside of the tube, and a second part penetrating into the tube so as to close the latter and movable outwardly in the tube under the action of the pressurized liquid so as to bring the interior of the tube into communication with the internal space in the movable element.