Patent ID: 7322382

Claim:
A segment for a rehabilitating pipe that can be coupled to another similar segment in the longitudinal direction of a rehabilitating pipe to rehabilitate an existing pipe, the segment comprising: an inner plate having opposite ends spaced apart from one another in a circumferential direction and opposite sides spaced apart from one another in the longitudinal direction, and two side plates extending upright from respective sides of the inner plate, each side plate having an outer surface that forms a coupling surface, one coupling surface having in the longitudinal direction a protruding part and a recessed part continuous with the protruding part and the other coupling surface having in the longitudinal direction a recessed part and a protruding part whose shapes respectively conform to the shapes of the protruding part and the recessed part of the one coupling surface so that the protruding part and the recessed part of the one coupling surface can be brought into tight surface contact with a recessed part and a protruding part of another coupling surface of another similar segment and interfitted thereto when the one and another segments are mutually coupled in the longitudinal direction of the rehabilitating pipe.