WIPER ARM FOR A SYSTEM FOR WIPING A PANE OF A MOTOR VEHICULE WITH A DEVICE FOR LATERAL SPRAYING OF A WASHING LIQUID

The invention relates to a device (11) for lateral projection of a washing liquid intended to be fixed to a wiper arm (3) of a windscreen wiping system of a motor vehicle window, the device comprising a supply cannula (35), a liquid distribution channel (39) and at least two liquid projection nozzles (28), the nozzles (28) and the supply cannula (35) being fluidically connected via the distribution channel (39). The nozzles (28) being arranged on either side of an axis (A) defined by the supply cannula (35). The invention also relates to a wiper blade arm (3) for a windscreen wiping system of a motor vehicle, comprising a lateral projection device (11) in order to allow spraying of each lateral side of the arm.