Patent ID: 8051524

Claim:
A multi-diameter elastic sealing module for pigs which is sent through the inside of a flexible or rigid pipe to move various fittings and remove internal incrustations from said pipe, impelled by a fluid which flows inside the above-mentioned pipe, and which is used as at least one of a complete pig or a sealing/impelling module of a multi-stage pig, which moves fittings coupled to it, the multi-diameter elastic sealing module comprising: a substantially cylindrical sealing/impelling element ( 1 ), the sealing/impelling element having a truncated cone formed at each end, a flexible core ( 2 ), formed as a hollow cylindrical body, which is covered by the sealing/impelling element ( 1 ), the flexible core having: coupling means for carrying out coupling operations formed on at least one end of the flexible core longitudinal slots ( 23 ), formed equally spaced in the cylindrical surface of the flexible core, the longitudinal slots extending from near a first end ( 21 ) of the flexible core ( 2 ) and terminating near a second end ( 22 ) of the flexible core ( 2 ), wherein the longitudinal slots form elastic strips ( 24 ) in the flexible core ( 2 ), a first, cylindrical, clamping element ( 3 ) having at least two segments with cross sections of different diameters, the first clamping element being coupled to the first end ( 21 ) of the flexible core ( 2 ), a second, cylindrical, clamping element ( 4 ) having at least two segments with cross sections of different diameters, the second clamping element being coupled to the second end ( 22 ) of the flexible core ( 2 ), a first fastening element ( 5 ) joined to the first clamping element ( 3 ), which fastens the first clamping element ( 3 ) to the first end ( 21 ) of the flexible core ( 2 ), a second fastening element ( 6 ) joined to the second clamping element ( 4 ), which fastens the second clamping element ( 4 ) to the second end ( 22 ) of the flexible core ( 2 ).