The present invention is an apparatus and method to control the steering of a tracked machine having a clutch/brake steering system. The tracked machine has a left drive and a right drive. The left drive has a clutch and brake and the right drive has a clutch and brake. The present invention includes...http://www.google.com.au/patents/US6141613?utm_source=gb-gplus-sharePatent US6141613 - Apparatus and method for controlling the steering of a tracked machine
