A tie device has a tie strap and a buckle engaging serrations on a free end of the tie strap retaining the free end of the tie strap in the buckle A passage extends through the buckle from an insertion end to an exit end. A cam action lock pawl is located in the passage. The lock pawl has a first resilient...http://www.google.es/patents/US7676892?utm_source=gb-gplus-sharePatente US7676892 - Tie device with cam action lock pawl
