Screen wiper arm, especially for a motor vehicle
AssigneeValeo Systèmes d'Essuyage
InventorBruno Lisiecki
Life of this patent
Estimating the term…
Abstract
A screen wiper for a motor vehicle comprises a casing articulated on a head, which is secured by means of a prefitted nut on to the threaded terminal shank of the wiper drive spindle. The head has an aperture through which the threaded shank passes, and a circular base or washer portion is fixed to the nut. Around the aperture there is arranged a set of upstanding retaining lugs which extend parallel to the axis of the aperture, and which grip the base of the nut in such a way as to retain the nut centered on the aperture, but without preventing it from being able to rotate while being tightened on to the threaded shank.
Claims9
In combination, a screen wiper arm with a drive spindle and a nut securing the wiper arm to the drive spindle, the drive spindle having a terminal threaded shank, the wiper arm comprising a head and a casing articulated on the said head, the head being secured on the said threaded shank by means of the nut, the head having an aperture through which the threaded shank can pass with said aperture defining an axis, the nut including a base having a circular contour by means of which the nut is prefitted and retained within the said head substantially on the said axis of the aperture, the arm further including a set of retaining lugs carried by the said head around the said axis, each said retaining lug extending parallel to the said axis and gripping, by friction the said base of the nut, so as to retain the nut centred on the said aperture but without preventing rotation of the nut during an assembly operation whereby the nut is tightened on to the said threaded shank, wherein the said retaining lugs include means for restraining axial movement of the said base, the said restraining means adapted to maintain the nut spaced apart from the said head prior to assembly.
Dependencies are inferred from the claim text.