Abstract: The present invention relates to a drive unit, in particular for a windshield wiper system on a motor vehicle, comprising a drive motor, a gearing accommodated in a gear housing and following the drive motor, which gearing has an output shaft driven in pendulum fashion and a pinion seated on it in a manner protected against twisting as well as including a stop member for limiting the pendulum angle of the output shaft. The stop member is either swivellable with the pinion or firmly arranged on the output shaft. In order to obtain a good guidance and a reliable hold of the stop member it is pushed upon the output shaft by means of a ring-shaped portion. In particular the ring-shaped portion can simultaneously serve as a buffer disc for the pinon, so that in comparison with a known drive unit, piece parts can be saved.

Abstract: A windshield cleaning system, in which the wiper shaft has a through-going bore, into which a pipe is inserted, in order to form a washing liquid channel for a washer system. A nozzle body is locked with the pipe, wherein in addition to the locking device a sealing device is also provided, so that even after a long period of use, no washing liquid can escape at the passage between nozzle body and pipe.