An apparatus and process for selectively expanding the wall of a tube by compression and subsequent radial expansion of one or more elastomeric bars lodged within longitudinal slots of a bushing positioned inside the tube. Expansion of the elastomeric bars against the inner surface of the tube results...http://www.google.fr/patents/US4422317?utm_source=gb-gplus-shareBrevet US4422317 - Apparatus and process for selectively expanding a tube
Apparatus and process for selectively expanding a tube
