Tube extractor

A tube extractor comprises a piston 13 movable within a cylinder 10 by a supply of fluid through a port 14, a broach member 50 secured to the piston 13 to move therewith, and a mandrel 60 secured to a clutch cage 63 of a clutch means 63, 70, 80 and kept stationary by a stationary clutch sleeve 70 engaging the cage 63 through balls 65 during the initial movement of the piston 13. Thus, a part 61 of the stationary mandrel 60 expands the teeth 51 of the broach member 50, during the initial movement, into the tube to be extracted from the sheet of a heat exchanger. Immediately thereafter an inner clutch sleeve 80 of the clutch means, pushed along by the piston 13, receives the balls 65 in its groove 82 thereby disengaging the sleeve 70 from the cage 63 and connecting said cage with the moving piston 13. Whence, further movement of piston 13, broach member 50 and inner sleeve 80 is transmitted to mandrel 60 via its connected cage 63. The mandrel 60 retracts along with members 13, 50 and 80 to extract the tube.