A modular endless track drive system for use on a track vehicle such as a bulldozer is made up of a number of polymeric drive modules interconnected with polymeric master links. Each drive module includes a plurality of drive members with lateral frictional drive faces for engagement with a drive wheel,...http://www.google.com.au/patents/US5040282?utm_source=gb-gplus-sharePatent US5040282 - Method of making a modular endless track drive system
