An apparatus for increasing the bending strength of tubes is provided. The apparatus may include an adapter and at least one sprint element. The adapter may have a shape that is matched to a cross-sectional shape of a tube end in such a manner that the adapter may be fitted to a tube connection of a...http://www.google.fr/patents/US20090194186?utm_source=gb-gplus-shareBrevet US20090194186 - INCREASING THE BENDING STRENGTH OF TUBES
Numéro de demande: 12/361,971 Numéro de publication: US 2009/0194186 A1 Date de dépôt: 29 janv. 2009 Brevet délivré: US7857009 ( Date de délivrance 28 déc. 2010)
