An assembly for forming a rollable piece of luggage having a U-shaped pull rod, two fastening members, a fastening frame, two caster members, and two locating members. The pull rod has two arms each having a retaining projection for engaging the fastening frame which is fastened with the shell of the...http://www.google.co.uk/patents/US5918710?utm_source=gb-gplus-sharePatent US5918710 - Do-it-yourself set for fastening a pull rod and casters with a luggage and the like
