Patent ID: 7034421

Claim:
A driving device for a windshield wiper assembly of a motor vehicle comprising: a housing; an electric motor located in the housing connected with a rotating armature shaft having a first end portion and a second end portion; a gear unit located in the housing with a worm located on an intermediate portion of the armature shaft; a support bearing supporting one end of the armature shaft at the housing; and an axial thrust generating device located on an opposite end of the armature shaft from the support bearing and possessing a tapered sliding member supported in the housing for movement in the radial direction relative to the armature shaft and supported against the armature shaft so that axial force can be applied to the armature shaft in the direction of the support bearing by moving the tapered sliding member, wherein the armature shaft is supported in a roller bearing with an inner race located on the armature shaft and an outer race located in one of a gear housing and in the motor housing.