A device for coupling to an object such as a pipe, particularly for joining pipes together, comprising a tubular sleeve of which at least one end portion has a wall that is weakened to facilitate radial deformation, a shape memory alloy driver having a portion of the sleeve other than the weakened portion...http://www.google.es/patents/US4872713?utm_source=gb-gplus-sharePatente US4872713 - Coupling device
