Gm Global Technolgoy Operations, Inc.

Valeo Corporation

Itt Automotive Electrical Systems, Inc.

William R Mack

Peter S Zhou

Ralph J Unterborn

Craig A Ham

Jeffrey T Weller

Harry C Buchanan, Jr

Jagmohan K Malhotra

This invention deals with a system and method for manufacturing a drive gear having a plurality of teeth in cross section where the teeth are situated on a drive shaft in a substantially parallel manner. The drive gear is characterized in that the teeth are substantially parallel to each other and contact mating driven teeth at points which define an arc which is not concentric about an axis of the driven gear. The drive gear is characterized in that it has multi-tooth contact points which do not contact the teeth of the mating gear at exactly the same contact point on the mating teeth, thereby lengthening the life of the driven gear as well as distributing the torque load to a plurality of teeth. A method and procedure for generating a drive gear having the features of the present invention is also disclosed.

Vehicle window drive system and method

A transmission for a windshield wiper includes a non-circular pinion gear having a closed pitch curve with a basic elliptical segment and a circular segment and a non-circular output gear having an open pitch curve with a third order elliptical segment and a circular segment. The pinion and the output gears mesh such that the basic elliptical and third order elliptical pitch curve segments roll against each other and the circular pitch curve segments roll against each other so that the gear ratio of the combination varies sinusoidally through a first included angle of output gear rotation and remains substantially constant through a second included angle of output gear rotation.

Windshield wiper transmission

Growing community of inventors

Kettering, OH, United States of America

William R Mack