Patent Number: 7,101,307

Title: Methods and devices for altering the transmission ratio of a drive system

Abstract: The transmission ratio between a first motor and an output shaft is varied by changing the speed of a second motor. The first and second motors are coupled to the output shaft with a planetary gear set. The first and second motors may both add power to the drive system.

Inventors: Clauson; Luke W. (Redwood Shores, CA)

Assignee: Clauson; Luke W.

International Classification: B60K 5/08 (20060101); B60K 1/00 (20060101); B60K 6/00 (20060101)

Expiration Date: 9/05/02018