Patent ID: 8122796

Claim:
Multipurpose expansion work device for the cutting, incision or expansion of metal tubes, of the type comprising: a tubular support body having a longitudinal axis; a work tool axially insertable in a metal tube, the work tool having a tubular base fixed to the support body, and a plurality of elastically spreadable longitudinal arms which stretch out from said base of the work tool, each of said arms being externally provided with a respective operative edge intended to come into contact with an inner surface of the metal tube; and an expansion member for divaricating said elastic arms of the tool, said expansion member being provided at a first end with a conical divarication head having a lateral thrust surface and being operatively connected at a second end to a linear actuator to move the head in said work tool between a disengagement position and a divarication position of the elastic arms of the work tool against the inner surface of the metal tube, and in that it comprises manually operable stop means for adjusting the insertion depth of the tool inside the metal tube.