Wiper arm with pantograph dynamic action

A wiper arm with pantograph dynamic action, comprising:

• a main rod and a secondary rod,
• wherein the said main rod and secondary rod each comprises a negative lift surface profile with a cross section delimited by an upper side, a lower side, and, in a direction of the air flow, an anterior edge referred to as a leading edge and a posterior edge referred to as a trailing edge opposite the leading edge,
• wherein, in a position as mounted on a vehicle, the arm is positioned with respect to a surface of the vehicle that is to be wiped in such a way that the said lower sides of the cross sections of the rods face towards the surface that is to be wiped, so as to press the arm more firmly against the surface of the vehicle that is to be wiped, and
• wherein, in the position as mounted on the vehicle:
• the main rod and secondary rod are positioned on a plane of cross section substantially orthogonal to the surface of the vehicle that is to be wiped,
• a connector holds at least one end of the main rod and at least one end of the secondary rod on a horizontal plane,
• a portion of the secondary rod closest to the at least one end of the secondary rod held by the connector is bent downwards towards the surface of the vehicle that is to be wiped to vertically offset the secondary rod from the main rod, the vertical offset creates a flow duct between the main rod and the secondary rod in which a depression is created.