A conveyor system for accurate weighing of a material where all system components are integrated as a single unit and are mounted on either a first or a second frame portion. A trailer hitch and a pair of wheels mounted on the first frame portion provide a portability feature of the conveyor system....http://www.google.es/patents/US6329613?utm_source=gb-gplus-sharePatente US6329613 - Portable conveyor belt scale
